CDM v6.0

PERSON

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
person_id	A unique identifier for each person.	integer	Yes	Yes	No
gender_concept_id	A foreign key that refers to an identifier in the CONCEPT table for the unique gender of the person.	integer	Yes	No	Yes	CONCEPT	Gender
year_of_birth	The year of birth of the person. For data sources with date of birth, the year is extracted. For data sources where the year of birth is not available, the approximate year of birth is derived based on any age group categorization available.	integer	Yes	No	No
month_of_birth	The month of birth of the person. For data sources that provide the precise date of birth, the month is extracted and stored in this field.	integer	No	No	No
day_of_birth	The day of the month of birth of the person. For data sources that provide the precise date of birth, the day is extracted and stored in this field.	integer	No	No	No
birth_datetime	The date and time of birth of the person.	datetime	No	No	No
death_datetime	The date and time of death of the person.	datetime	No	No	No
race_concept_id	A foreign key that refers to an identifier in the CONCEPT table for the unique race of the person, belonging to the ‘’Race’’ vocabulary.	integer	Yes	No	Yes	CONCEPT	Race
ethnicity_concept_id	A foreign key that refers to the standard concept identifier in the Standardized Vocabularies for the ethnicity of the person, belonging to the ‘’Ethnicity’’ vocabulary.	integer	Yes	No	Yes	CONCEPT	Ethnicity
location_id	A foreign key to the place of residency for the person in the location table, where the detailed address information is stored.	integer	No	No	Yes	LOCATION
provider_id	A foreign key to the primary care provider the person is seeing in the provider table.	integer	No	No	Yes	PROVIDER
care_site_id	A foreign key to the site of primary care in the care_site table, where the details of the care site are stored.	integer	No	No	Yes	CARE_SITE
person_source_value	An (encrypted) key derived from the person identifier in the source data. This is necessary when a use case requires a link back to the person data at the source dataset.	varchar(50)	No	No	No
gender_source_value	The source code for the gender of the person as it appears in the source data. The person’s gender is mapped to a standard gender concept in the Standardized Vocabularies; the original value is stored here for reference.	varchar(50)	No	No	No
gender_source_concept_id	A foreign key to the gender concept that refers to the code used in the source.	Integer	Yes	No	Yes	CONCEPT
race_source_value	The source code for the race of the person as it appears in the source data. The person race is mapped to a standard race concept in the Standardized Vocabularies and the original value is stored here for reference.	varchar(50)	No	No	No
race_source_concept_id	A foreign key to the race concept that refers to the code used in the source.	Integer	Yes	No	Yes	CONCEPT
ethnicity_source_value	The source code for the ethnicity of the person as it appears in the source data. The person ethnicity is mapped to a standard ethnicity concept in the Standardized Vocabularies and the original code is, stored here for reference.	varchar(50)	No	No	No
ethnicity_source_concept_id	A foreign key to the ethnicity concept that refers to the code used in the source.	Integer	Yes	No	Yes	CONCEPT

OBSERVATION_PERIOD

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
observation_period_id	A unique identifier for each observation period.	integer	Yes	Yes	No
person_id	A foreign key identifier to the person for whom the observation period is defined. The demographic details of that person are stored in the person table.	integer	Yes	No	Yes	PERSON
observation_period_start_date	The start date of the observation period for which data are available from the data source.	date	Yes	No	No
observation_period_end_date	The end date of the observation period for which data are available from the data source.	date	Yes	No	No
period_type_concept_id	A foreign key identifier to the predefined concept in the Standardized Vocabularies reflecting the source of the observation period information, belonging to the ‘’Obs Period Type’’ vocabulary	Integer	Yes	No	Yes	CONCEPT	Type Concept

VISIT_OCCURRENCE

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
visit_occurrence_id	A unique identifier for each Person’’s visit or encounter at a healthcare provider.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person for whom the visit is recorded. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	Yes	PERSON
visit_concept_id	A foreign key that refers to a visit Concept identifier in the Standardized Vocabularies belonging to the ‘’Visit’’ Vocabulary.	integer	Yes	No	Yes	CONCEPT	Visit
visit_start_date	The start date of the visit.	date	No	No	No
visit_start_datetime	The date and time of the visit started.	datetime	Yes	No	No
visit_end_date	The end date of the visit. If this is a one-day visit the end date should match the start date.	date	No	No	No
visit_end_datetime	The date and time of the visit end.	datetime	Yes	No	No
visit_type_concept_id	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of source data from which the visit record is derived belonging to the ‘’Visit Type’’ vocabulary.	Integer	Yes	No	Yes	CONCEPT	Type Concept
provider_id	A foreign key to the provider in the provider table who was associated with the visit.	integer	No	No	No	PROVIDER
care_site_id	A foreign key to the care site in the care site table that was visited.	integer	No	No	No	CARE_SITE
visit_source_value	The source code for the visit as it appears in the source data.	varchar(50)	No	No	No
visit_source_concept_id	A foreign key to a Concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT
admitted_from_concept_id	A foreign key to the predefined concept in the Place of Service Vocabulary reflecting where the patient was admitted from.	integer	Yes	No	Yes	CONCEPT
admitted_from_source_value	The source code for where the patient was admitted from as it appears in the source data.	varchar(50)	No	No	No
discharge_to_concept_id	A foreign key to the predefined concept in the Place of Service Vocabulary reflecting the discharge disposition for a visit.	integer	Yes	No	Yes	CONCEPT
discharge_to_source_value	The source code for the discharge disposition as it appears in the source data.	varchar(50)	No	No	No
preceding_visit_occurrence_id	A foreign key to the VISIT_OCCURRENCE table of the visit immediately preceding this visit	integer	No	No	Yes	VISIT_OCCURRENCE

CONDITION_OCCURRENCE

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
condition_occurrence_id	A unique identifier for each Condition Occurrence event.	bigint	Yes	Yes	No
person_id	A foreign key identifier to the Person who is experiencing the condition. The demographic details of that Person are stored in the PERSON table.	bigint	Yes	No	Yes	PERSON
condition_concept_id	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies belonging to the ‘’Condition’’ domain.	integer	Yes	No	Yes	CONCEPT	Condition
condition_start_date	The date when the instance of the Condition is recorded.	date	No	No	No
condition_start_datetime	The date and time when the instance of the Condition is recorded.	datetime	Yes	No	No
condition_end_date	The date when the instance of the Condition is considered to have ended.	date	No	No	No
condition_end_datetime	The date when the instance of the Condition is considered to have ended.	datetime	No	No	No
condition_type_concept_id	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the source data from which the Condition was recorded, the level of standardization, and the type of occurrence. These belong to the ‘’Condition Type’’ vocabulary	integer	Yes	No	Yes	CONCEPT	Type Concept
condition_status_concept_id	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies reflecting the point of care at which the Condition was diagnosed.	integer	Yes	No	Yes	CONCEPT
stop_reason	The reason that the Condition was no longer present, as indicated in the source data.	varchar(20)	No	No	No
provider_id	A foreign key to the Provider in the PROVIDER table who was responsible for capturing (diagnosing) the Condition.	integer	No	No	Yes	PROVIDER
visit_occurrence_id	A foreign key to the visit in the VISIT_OCCURRENCE table during which the Condition was determined (diagnosed).	integer	No	No	Yes	VISIT_OCCURRENCE
visit_detail_id	A foreign key to the visit in the VISIT_DETAIL table during which the Condition was determined (diagnosed).	integer	No	No	Yes	VISIT_DETAIL
condition_source_value	The source code for the Condition as it appears in the source data. This code is mapped to a Standard Condition Concept in the Standardized Vocabularies and the original code is stored here for reference.	varchar(50)	No	No	No
condition_source_concept_id	A foreign key to a Condition Concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT
condition_status_source_value	The source code for the condition status as it appears in the source data. This code is mapped to a Standard Concept in the Standardized Vocabularies and the original code is stored here for reference.	varchar(50)	No	No	No

DRUG_EXPOSURE

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
drug_exposure_id	A system-generated unique identifier for each Drug utilization event.	bigint	Yes	Yes	No
person_id	A foreign key identifier to the Person who is subjected to the Drug. The demographic details of that Person are stored in the PERSON table.	bigint	Yes	No	Yes	PERSON
drug_concept_id	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies belonging to the ‘’Drug’’ domain.	integer	Yes	No	Yes	CONCEPT	Drug
drug_exposure_start_date	The start date for the current instance of Drug utilization. Valid entries include a start date of a prescription, the date a prescription was filled, or the date on which a Drug administration procedure was recorded.	date	No	No	No
drug_exposure_start_datetime	The start date and time for the current instance of Drug utilization. Valid entries include a start datetime of a prescription, the date and time a prescription was filled, or the date and time on which a Drug administration procedure was recorded.	datetime	Yes	No	No
drug_exposure_end_date	The end date for the current instance of Drug utilization. Depending on different sources, it could be a known or an inferred date and denotes the last day at which the patient was still exposed to Drug.	date	Yes	No	No
drug_exposure_end_datetime	The end date and time for the current instance of Drug utilization. Depending on different sources, it could be a known or an inferred date and time and denotes the last day at which the patient was still exposed to Drug.	datetime	Yes	No	No
verbatim_end_date	The known end date of a drug_exposure as provided by the source.	date	No	No	No
drug_type_concept_id	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of Drug Exposure recorded. It indicates how the Drug Exposure was represented in the source data and belongs to the ‘’Drug Type’’ vocabulary.	integer	Yes	No	Yes	CONCEPT	Type Concept
stop_reason	The reason the Drug was stopped. Reasons include regimen completed, changed, removed, etc.	varchar(20)	No	No	No
refills	The number of refills after the initial prescription. The initial prescription is not counted, values start with null.	integer	No	No	No
quantity	The quantity of drug as recorded in the original prescription or dispensing record.	float	No	No	No
days_supply	The number of days of supply of the medication as prescribed. This reflects the intention of the provider for the length of exposure.	integer	No	No	No
sig	The directions (‘’signetur’’) on the Drug prescription as recorded in the original prescription (and printed on the container) or dispensing record.	varchar(MAX)	No	No	No
route_concept_id	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies reflecting the route of administration and belonging to the ‘’Route’’ domain.	integer	Yes	No	Yes	CONCEPT
lot_number	An identifier assigned to a particular quantity or lot of Drug product from the manufacturer.	varchar(50)	No	No	No
provider_id	A foreign key to the provider in the PROVIDER table who initiated (prescribed or administered) the Drug Exposure.	integer	No	No	Yes	PROVIDER
visit_occurrence_id	A foreign key to the Visit in the VISIT_OCCURRENCE table during which the Drug Exposure was initiated.	integer	No	No	Yes	VISIT_OCCURRENCE
visit_detail_id	A foreign key to the Visit Detail in the VISIT_DETAIL table during which the Drug Exposure was initiated.	integer	No	No	Yes	VISIT_DETAIL
drug_source_value	The source code for the Drug as it appears in the source data. This code is mapped to a Standard Drug concept in the Standardized Vocabularies and the original code is, stored here for reference.	varchar(50)	No	No	No
drug_source_concept_id	A foreign key to a Drug Concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT
route_source_value	The information about the route of administration as detailed in the source.	varchar(50)	No	No	No
dose_unit_source_value	The information about the dose unit as detailed in the source.	varchar(50)	No	No	No

PROCEDURE_OCCURRENCE

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
procedure_occurrence_id	A system-generated unique identifier for each Procedure Occurrence.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person who is subjected to the Procedure. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	Yes	PERSON
procedure_concept_id	A foreign key that refers to a standard procedure Concept identifier in the Standardized Vocabularies.	integer	Yes	No	Yes	CONCEPT	Procedure
procedure_date	The date on which the Procedure was performed.	date	No	No	No
procedure_datetime	The date and time on which the Procedure was performed.	datetime	Yes	No	No
procedure_type_concept_id	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of source data from which the procedure record is derived, belonging to the ‘Procedure Type’ vocabulary.	integer	Yes	No	Yes	CONCEPT	Type Concept
modifier_concept_id	A foreign key to a Standard Concept identifier for a modifier to the Procedure (e.g. bilateral). These concepts are typically distinguished by ‘Modifier’ concept classes (e.g., ‘CPT4 Modifier’ as part of the ‘CPT4’ vocabulary).	integer	Yes	No	Yes	CONCEPT
quantity	The quantity of procedures ordered or administered.	integer	No	No	No
provider_id	A foreign key to the provider in the PROVIDER table who was responsible for carrying out the procedure.	integer	No	No	No	PROVIDER
visit_occurrence_id	A foreign key to the Visit in the VISIT_OCCURRENCE table during which the Procedure was carried out.	integer	No	No	No	VISIT_OCCURRENCE
visit_detail_id	A foreign key to the Visit Detail in the VISIT_DETAIL table during which the Procedure was carried out.	integer	No	No	No	VISIT_DETAIL
procedure_source_value	The source code for the Procedure as it appears in the source data. This code is mapped to a standard procedure Concept in the Standardized Vocabularies and the original code is, stored here for reference. Procedure source codes are typically ICD-9-Proc, CPT-4, HCPCS or OPCS-4 codes.	varchar(50)	No	No	No
procedure_source_concept_id	A foreign key to a Procedure Concept that refers to the code used in the source.	integer	Yes	No	No	CONCEPT
modifier_source_value	The source code for the qualifier as it appears in the source data.	varchar(50)	No	No	No

DEVICE_EXPOSURE

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
device_exposure_id	A system-generated unique identifier for each Device Exposure.	bigint	Yes	Yes	No
person_id	A foreign key identifier to the Person who is subjected to the Device. The demographic details of that Person are stored in the PERSON table.	bigint	Yes	No	Yes	PERSON
device_concept_id	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies belonging to the ‘Device’ domain.	integer	Yes	No	Yes	CONCEPT	Device
device_exposure_start_date	The date the Device or supply was applied or used.	date	No	No	No
device_exposure_start_datetime	The date and time the Device or supply was applied or used.	datetime	Yes	No	No
device_exposure_end_date	The date use of the Device or supply was ceased.	date	No	No	No
device_exposure_end_datetime	The date and time use of the Device or supply was ceased.	datetime	No	No	No
device_type_concept_id	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of Device Exposure recorded. It indicates how the Device Exposure was represented in the source data and belongs to the ‘Device Type’ domain.	integer	Yes	No	Yes	CONCEPT	Type Concept
unique_device_id	A UDI or equivalent identifying the instance of the Device used in the Person.	varchar(50)	No	No	No
quantity	The number of individual Devices used in the exposure.	integer	No	No	No
provider_id	A foreign key to the provider in the PROVIDER table who initiated or administered the Device.	integer	No	No	Yes	PROVIDER
visit_occurrence_id	A foreign key to the visit in the VISIT_OCCURRENCE table during which the Device was used.	integer	No	No	Yes	VISIT_OCCURRENCE
visit_detail_id	A foreign key to the visit detail record in the VISIT_DETAIL table during which the Device was used.	integer	No	No	Yes	VISIT_DETAIL
device_source_value	The source code for the Device as it appears in the source data. This code is mapped to a Standard Device Concept in the Standardized Vocabularies and the original code is stored here for reference.	varchar(50)	No	No	No
device_source_concept_id	A foreign key to a Device Concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT

MEASUREMENT

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
measurement_id	A unique identifier for each Measurement.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person about whom the measurement was recorded. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	Yes	PERSON
measurement_concept_id	A foreign key to the standard measurement concept identifier in the Standardized Vocabularies. These belong to the ‘Measurement’ domain, but could overlap with the ‘Observation’ domain (see #3 below).	integer	Yes	No	Yes	CONCEPT	Measurement
measurement_date	The date of the Measurement.	date	No	No	No
measurement_datetime	The date and time of the Measurement. Some database systems don’t have a datatype of time. To accommodate all temporal analyses, datatype datetime can be used (combining measurement_date and measurement_time forum discussion)	datetime	Yes	No	No
measurement_time	The time of the Measurement. This is present for backwards compatibility and will be deprecated in an upcoming version	varchar(10)	No	No	No
measurement_type_concept_id	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the provenance from where the Measurement record was recorded. These belong to the ‘Meas Type’ vocabulary	integer	Yes	No	Yes	CONCEPT	Type Concept
operator_concept_id	A foreign key identifier to the predefined Concept in the Standardized Vocabularies reflecting the mathematical operator that is applied to the value_as_number. Operators are <, <=, =, >=, > and these concepts belong to the ‘Meas Value Operator’ domain.	integer	No	No	Yes	CONCEPT
value_as_number	A Measurement result where the result is expressed as a numeric value.	float	No	No	No
value_as_concept_id	A foreign key to a Measurement result represented as a Concept from the Standardized Vocabularies (e.g., positive/negative, present/absent, low/high, etc.). These belong to the ‘Meas Value’ domain	integer	No	No	Yes	CONCEPT
unit_concept_id	A foreign key to a Standard Concept ID of Measurement Units in the Standardized Vocabularies that belong to the ‘Unit’ domain.	integer	No	No	Yes	CONCEPT	Unit
range_low	The lower limit of the normal range of the Measurement result. The lower range is assumed to be of the same unit of measure as the Measurement value.	float	No	No	No
range_high	The upper limit of the normal range of the Measurement. The upper range is assumed to be of the same unit of measure as the Measurement value.	float	No	No	No
provider_id	A foreign key to the provider in the PROVIDER table who was responsible for initiating or obtaining the measurement.	integer	No	No	Yes	PROVIDER
visit_occurrence_id	A foreign key to the Visit in the VISIT_OCCURRENCE table during which the Measurement was recorded.	integer	No	No	Yes	VISIT_OCCURRENCE
visit_detail_id	A foreign key to the Visit Detail in the VISIT_DETAIL table during which the Measurement was recorded.	integer	No	No	Yes	VISIT_DETAIL
measurement_source_value	The Measurement name as it appears in the source data. This code is mapped to a Standard Concept in the Standardized Vocabularies and the original code is stored here for reference.	varchar(50)	No	No	No
measurement_source_concept_id	A foreign key to a Concept in the Standard Vocabularies that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT
unit_source_value	The source code for the unit as it appears in the source data. This code is mapped to a standard unit concept in the Standardized Vocabularies and the original code is stored here for reference.	varchar(50)	No	No	No
value_source_value	The source value associated with the content of the value_as_number or value_as_concept_id as stored in the source data.	varchar(50)	No	No	No

VISIT_DETAIL

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
visit_detail_id	A unique identifier for each Person’s visit or encounter at a healthcare provider.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person for whom the visit is recorded. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	Yes	PERSON
visit_detail_concept_id	A foreign key that refers to a visit Concept identifier in the Standardized Vocabularies belonging to the ‘Visit’ Vocabulary.	integer	Yes	No	Yes	CONCEPT	Visit
visit_detail_start_date	The start date of the visit.	date	No	No	No
visit_detail_start_datetime	The date and time of the visit started.	datetime	Yes	No	No
visit_detail_end_date	The end date of the visit. If this is a one-day visit the end date should match the start date.	date	No	No	No
visit_detail_end_datetime	The date and time of the visit end.	datetime	Yes	No	No
visit_detail_type_concept_id	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of source data from which the visit record is derived belonging to the ‘Visit Type’ vocabulary.	Integer	Yes	No	Yes
provider_id	A foreign key to the provider in the provider table who was associated with the visit.	integer	No	No	Yes	PROVIDER
care_site_id	A foreign key to the care site in the care site table that was visited.	integer	No	No	Yes	CARE_SITE
visit_detail_source_value	The source code for the visit as it appears in the source data.	string(50)	No	No	No
visit_detail_source_concept_id	A foreign key to a Concept that refers to the code used in the source.	Integer	Yes	No	Yes	CONCEPT
admitted_from_source_value	The source code for the admitting source as it appears in the source data.	Varchar(50)	No	No	No
admitted_from_concept_id	A foreign key to the predefined concept in the ‘Place of Service’ Vocabulary reflecting the admitting source for a visit.	Integer	Yes	No	Yes	CONCEPT
discharge_to_source_value	The source code for the discharge disposition as it appears in the source data.	Varchar(50)	No	No	No
discharge_to_concept_id	A foreign key to the predefined concept in the ‘Place of Service’ Vocabulary reflecting the discharge disposition for a visit.	Integer	Yes	No	Yes	CONCEPT
preceding_visit_detail_id	A foreign key to the VISIT_DETAIL table of the visit immediately preceding this visit	Integer	No	No	Yes	VISIT_DETAIL
visit_detail_parent_id	A foreign key to the VISIT_DETAIL table record to represent the immediate parent visit-detail record.	Integer	No	No	Yes	VISIT_DETAIL
visit_occurrence_id	A foreign key that refers to the record in the VISIT_OCCURRENCE table. This is a required field, because for every visit_detail is a child of visit_occurrence and cannot exist without a corresponding parent record in visit_occurrence.	Integer	Yes	No	Yes	VISIT_OCCURRENCE

NOTE

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
note_id	A unique identifier for each note.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person about whom the Note was recorded. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	Yes	PERSON
note_event_id	A foreign key identifier to the event (e.g. Measurement, Procedure, Visit, Drug Exposure, etc) record during which the note was recorded.	integer	No	No	No
note_event_field_concept_id	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the field to which the note_event_id is referring.	integer	No	No	No	CONCEPT
note_date	The date the note was recorded.	date	No	No	No
note_datetime	The date and time the note was recorded.	datetime	Yes	No	No
note_type_concept_id	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the type, origin or provenance of the Note. These belong to the ‘Note Type’ vocabulary	integer	Yes	No	Yes	CONCEPT	Type Concept
note_class_concept_id	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the HL7 LOINC Document Type Vocabulary classification of the note.	integer	Yes	No	Yes	CONCEPT
note_title	The title of the Note as it appears in the source.	varchar(250)	No	No	No
note_text	The content of the Note.	varchar(MAX)	Yes	No	No
encoding_concept_id	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the note character encoding type	integer	Yes	No	Yes	CONCEPT
language_concept_id	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the language of the note	integer	Yes	No	Yes	CONCEPT
provider_id	A foreign key to the Provider in the PROVIDER table who took the Note.	integer	No	No	Yes
visit_occurrence_id	A foreign key to the Visit in the VISIT_OCCURRENCE table when the Note was taken.	integer	No	No	Yes	VISIT_OCCURRENCE
visit_detail_id	A foreign key to the Visit in the VISIT_DETAIL table when the Note was taken.	integer	No	No	Yes	VISIT_DETAIL
note_source_value	The source value associated with the origin of the Note	varchar(50)	No	No	No

NOTE_NLP

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table
note_nlp_id	A unique identifier for each term extracted from a note.	integer	Yes	Yes	No
note_id	A foreign key to the Note table note the term was	integer	Yes	No	No
section_concept_id	A foreign key to the predefined Concept in the Standardized Vocabularies representing the section of the extracted term.	integer	Yes	No	Yes	NOTE
snippet	A small window of text surrounding the term.	varchar(250)	No	No	No
offset	Character offset of the extracted term in the input note.	varchar(50)	No	No	No
lexical_variant	Raw text extracted from the NLP tool.	varchar(250)	Yes	No	No
note_nlp_concept_id	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the normalized concept for the extracted term. Domain of the term is represented as part of the Concept table.	integer	Yes	No	Yes	CONCEPT
note_nlp_source_concept_id	A foreign key to a Concept that refers to the code in the source vocabulary used by the NLP system	integer	Yes	No	Yes	CONCEPT
nlp_system	Name and version of the NLP system that extracted the term.Useful for data provenance.	varchar(250)	No	No	No
nlp_date	The date of the note processing.Useful for data provenance.	date	Yes	No	No
nlp_datetime	The date and time of the note processing. Useful for data provenance.	datetime	No	No	No
term_exists	A summary modifier that signifies presence or absence of the term for a given patient. Useful for quick querying.	varchar(1)	No	No	No
term_temporal	An optional time modifier associated with the extracted term. (for now “past” or “present” only). Standardize it later.	varchar(50)	No	No	No
term_modifiers	A compact description of all the modifiers of the specific term extracted by the NLP system. (e.g. “son has rash” ? “negated=no,subject=family, certainty=undef,conditional=false,general=false”).	varchar(2000)	No	No	No

SURVEY_CONDUCT

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table
SURVEY_CONDUCT_ID	Unique identifier for each completed survey.	integer	Yes	Yes	No
PERSON_ID	A foreign key identifier to the Person in the PERSON table about whom the survey was completed.	integer	Yes	No	Yes	PERSON
SURVEY_CONCEPT_ID	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the name and identity of the survey.	integer	Yes	No	Yes	CONCEPT
SURVEY_START_DATE	Date on which the survey was started.	date	No	No	No
SURVEY_START_DATETIME	Date and time the survey was started.	datetime	Yes	No	No
SURVEY_END_DATE	Date on which the survey was completed.	date	No	No	No
SURVEY_END_DATETIME	Date and time the survey was completed.	datetime	Yes	No	No
PROVIDER_ID	A foreign key to the provider in the provider table who was associated with the survey completion.	integer	No	No	Yes	PROVIDER
ASSISTED_CONCEPT_ID	A foreign key to the predefined Concept identifier in the Standardized Vocabularies indicating whether the survey was completed with assistance.	integer	Yes	No	Yes
RESPONDENT_TYPE_CONCEPT_ID	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the respondent type. Example: Research Associate, Patient.	integer	Yes	No	Yes	CONCEPT
TIMING_CONCEPT_ID	A foreign key to the predefined Concept identifier in the Standardized Vocabularies that refers to a certain timing. Example: 3 month follow-up, 6 month follow-up.	integer	Yes	No	Yes
COLLECTION_METHOD_CONCEPT_ID	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the data collection method (e.g. Paper, Telephone, Electronic Questionnaire).	integer	Yes	No	No	CONCEPT
ASSISTED_SOURCE_VALUE	Source value representing whether patient required assistance to complete the survey. Example: “Completed without assistance”, ”Completed with assistance”.	varchar(50)	No	No	No
RESPONDENT_TYPE_SOURCE_VALUE	Source code representing role of person who completed the survey.	varchar(100)	No	No	No
TIMING_SOURCE_VALUE	Text string representing the timing of the survey. Example: Baseline, 6-month follow-up.	varchar(100)	No	No	No
COLLECTION_METHOD_SOURCE_VALUE	The collection method as it appears in the source data.	varchar(100)	No	No	No
SURVEY_SOURCE_VALUE	The survey name/title as it appears in the source data.	varchar(100)	No	No	No
SURVEY_SOURCE_CONCEPT_ID	A foreign key to a predefined Concept that refers to the code for the survey name/title used in the source.	integer	Yes	No	Yes	CONCEPT
SURVEY_SOURCE_IDENTIFIER	Unique identifier for each completed survey in source system.	varchar(100)	No	No	No
VALIDATED_SURVEY_CONCEPT_ID	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the validation status of the survey.	integer	Yes	No	Yes	CONCEPT
VALIDATED_SURVEY_SOURCE_VALUE	Source value representing the validation status of the survey.	integer	No	No	No
SURVEY_VERSION_NUMBER	Version number of the questionnaire or survey used.	varchar(20)	No	No	No
VISIT_OCCURRENCE_ID	A foreign key to the VISIT_OCCURRENCE table during which the survey was completed	integer	No	No	Yes	VISIT_OCCURRENCE
RESPONSE_VISIT_OCCURRENCE_ID	A foreign key to the visit in the VISIT_OCCURRENCE table during which treatment was carried out that relates to this survey.	integer	No	No	Yes	VISIT_OCCURRENCE

OBSERVATION

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
observation_id	A unique identifier for each observation.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person about whom the observation was recorded. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	Yes	PERSON
observation_concept_id	A foreign key to the standard observation concept identifier in the Standardized Vocabularies.	integer	Yes	No	Yes	CONCEPT
observation_date	The date of the observation.	date	No	No	No
observation_datetime	The date and time of the observation.	datetime	Yes	No	No
observation_type_concept_id	A foreign key to the predefined concept identifier in the Standardized Vocabularies reflecting the type of the observation.	integer	Yes	No	Yes	CONCEPT	Type Concept
value_as_number	The observation result stored as a number. This is applicable to observations where the result is expressed as a numeric value.	float	No	No	No
value_as_string	The observation result stored as a string. This is applicable to observations where the result is expressed as verbatim text.	varchar(60)	No	No	No
value_as_concept_id	A foreign key to an observation result stored as a Concept ID. This is applicable to observations where the result can be expressed as a Standard Concept from the Standardized Vocabularies (e.g., positive/negative, present/absent, low/high, etc.).	Integer	No	No	Yes	CONCEPT
qualifier_concept_id	A foreign key to a Standard Concept ID for a qualifier (e.g., severity of drug-drug interaction alert)	integer	No	No	Yes	CONCEPT
unit_concept_id	A foreign key to a Standard Concept ID of measurement units in the Standardized Vocabularies.	integer	No	No	Yes	CONCEPT	Unit
provider_id	A foreign key to the provider in the PROVIDER table who was responsible for making the observation.	integer	No	No	Yes	PROVIDER
visit_occurrence_id	A foreign key to the visit in the VISIT_OCCURRENCE table during which the observation was recorded.	integer	No	No	Yes	VISIT_OCCURRENCE
visit_detail_id	A foreign key to the visit in the VISIT_DETAIL table during which the observation was recorded.	integer	No	No	Yes	VISIT_DETAIL
observation_source_value	The observation code as it appears in the source data. This code is mapped to a Standard Concept in the Standardized Vocabularies and the original code is, stored here for reference.	varchar(50)	No	No	No
observation_source_concept_id	A foreign key to a Concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT
unit_source_value	The source code for the unit as it appears in the source data. This code is mapped to a standard unit concept in the Standardized Vocabularies and the original code is, stored here for reference.	varchar(50)	No	No	No
qualifier_source_value	The source value associated with a qualifier to characterize the observation	varchar(50)	No	No	No
observation_event_id	A foreign key to an event table (e.g., PROCEDURE_OCCURRENCE_ID).	integer	No	No	No
obs_event_field_concept_id	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies referring to the field represented in the OBSERVATION_EVENT_ID.	integer	Yes	No	Yes	CONCEPT
value_as_datetime	The observation result stored as a datetime value. This is applicable to observations where the result is expressed as a point in time.	datetime	No	No	No

SPECIMEN

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
specimen_id	A unique identifier for each specimen.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person for whom the Specimen is recorded.	integer	Yes	No	Yes	PERSON
specimen_concept_id	A foreign key referring to a Standard Concept identifier in the Standardized Vocabularies for the Specimen.	integer	Yes	No	Yes	CONCEPT
specimen_type_concept_id	A foreign key referring to the Concept identifier in the Standardized Vocabularies reflecting the system of record from which the Specimen was represented in the source data.	integer	Yes	No	Yes	CONCEPT	Type Concept
specimen_date	The date the specimen was obtained from the Person.	date	No	No	No
specimen_datetime	The date and time on the date when the Specimen was obtained from the person.	datetime	Yes	No	No
quantity	The amount of specimen collection from the person during the sampling procedure.	float	No	No	No
unit_concept_id	A foreign key to a Standard Concept identifier for the Unit associated with the numeric quantity of the Specimen collection.	integer	No	No	Yes	CONCEPT
anatomic_site_concept_id	A foreign key to a Standard Concept identifier for the anatomic location of specimen collection.	integer	Yes	No	Yes	CONCEPT
disease_status_concept_id	A foreign key to a Standard Concept identifier for the Disease Status of specimen collection.	integer	Yes	No	Yes	CONCEPT
specimen_source_id	The Specimen identifier as it appears in the source data.	varchar(50)	No	No	No
specimen_source_value	The Specimen value as it appears in the source data. This value is mapped to a Standard Concept in the Standardized Vocabularies and the original code is, stored here for reference.	varchar(50)	No	No	No
unit_source_value	The information about the Unit as detailed in the source.	varchar(50)	No	No	No
anatomic_site_source_value	The information about the anatomic site as detailed in the source.	varchar(50)	No	No	No
disease_status_source_value	The information about the disease status as detailed in the source.	varchar(50)	No	No	No

FACT_RELATIONSHIP

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table
domain_concept_id_1	The concept representing the domain of fact one, from which the corresponding table can be inferred.	integer	Yes	No	Yes	CONCEPT
fact_id_1	The unique identifier in the table corresponding to the domain of fact one.	integer	Yes	No	No
domain_concept_id_2	The concept representing the domain of fact two, from which the corresponding table can be inferred.	integer	Yes	No	Yes	CONCEPT
fact_id_2	The unique identifier in the table corresponding to the domain of fact two.	integer	Yes	No	No
relationship_concept_id	A foreign key to a Standard Concept ID of relationship in the Standardized Vocabularies.	integer	Yes	No	Yes	CONCEPT

LOCATION

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)
location_id	A unique identifier for each geographic location.	integer	Yes	Yes	No
address_1	The address field 1, typically used for the street address, as it appears in the source data.	varchar(50)	No	No	No
address_2	The address field 2, typically used for additional detail such as buildings, suites, floors, as it appears in the source data.	varchar(50)	No	No	No
city	The city field as it appears in the source data.	varchar(50)	No	No	No
state	The state field as it appears in the source data.	varchar(2)	No	No	No
zip	The zip or postal code.	varchar(9)	No	No	No
county	The county.	varchar(20)	No	No	No
country	The country	varchar(100)	No	No	No
location_source_value	The verbatim information that is used to uniquely identify the location as it appears in the source data.	varchar(50)	No	No	No
latitude	The geocoded latitude	float	No	No	No
longitude	The geocoded longitude	float	No	No	No

LOCATION_HISTORY

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table
location_id	A foreign key to the location table.	integer	Yes	No	Yes	LOCATION
relationship_type_concept_id	The type of relationship between location and entity.	varchar(50)	Yes	No	Yes	CONCEPT
domain_id	The domain of the entity that is related to the location. Either PERSON, PROVIDER, or CARE_SITE.	varchar(50)	Yes	No	No
entity_id	The unique identifier for the entity. References either person_id, provider_id, or care_site_id, depending on domain_id.	integer	Yes	No	No
start_date	The date the relationship started.	date	Yes	No	No
end_date	The date the relationship ended.	date	No	No	No

CARE_SITE

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table
care_site_id	A unique identifier for each Care Site.	integer	Yes	Yes	No
care_site_name	The verbatim description or name of the Care Site as in data source	varchar(255)	No	No	No
place_of_service_concept_id	A foreign key that refers to a Place of Service Concept ID in the Standardized Vocabularies.	integer	Yes	No	Yes	CONCEPT
location_id	A foreign key to the geographic Location in the LOCATION table, where the detailed address information is stored.	integer	No	No	No
care_site_source_value	The identifier for the Care Site in the source data, stored here for reference.	varchar(50)	No	No	No
place_of_service_source_value	The source code for the Place of Service as it appears in the source data, stored here for reference.	varchar(50)	No	No	No

PROVIDER

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
provider_id	A unique identifier for each Provider.	integer	Yes	Yes	No
provider_name	A description of the Provider.	varchar(255)	No	No	No
npi	The National Provider Identifier (NPI) of the provider.	varchar(20)	No	No	No
dea	The Drug Enforcement Administration (DEA) number of the provider.	varchar(20)	No	No	No
specialty_concept_id	A foreign key to a Standard Specialty Concept ID in the Standardized Vocabularies.	integer	Yes	No	Yes	CONCEPT
care_site_id	A foreign key to the main Care Site where the provider is practicing.	integer	No	No	Yes	CARE_SITE
year_of_birth	The year of birth of the Provider.	integer	No	No	No
gender_concept_id	The gender of the Provider.	integer	Yes	No	Yes	CONCEPT	Gender
provider_source_value	The identifier used for the Provider in the source data, stored here for reference.	varchar(50)	No	No	No
specialty_source_value	The source code for the Provider specialty as it appears in the source data, stored here for reference.	varchar(50)	No	No	No
specialty_source_concept_id	A foreign key to a Concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT
gender_source_value	The gender code for the Provider as it appears in the source data, stored here for reference.	varchar(50)	No	No	No
gender_source_concept_id	A foreign key to a Concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT

PAYER_PLAN_PERIOD

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table
payer_plan_period_id	A identifier for each unique combination of payer, plan, family code and time span.	integer	Yes	Yes	Yes	PERSON
person_id	A foreign key identifier to the Person covered by the payer. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	Yes	PERSON
contract_person_id	A foreign key identifier to the person_id in person table, for the person who is the primary subscriber/contract owner for the record in the payer_plan_period table. Maybe the same person or different person, depending on who is the primary subscriber/contract owner.	integer	No	No	No
payer_plan_period_start_date	The start date of the payer plan period.	date	Yes	No	No
payer_plan_period_end_date	The end date of the payer plan period.	date	Yes	No	No
payer_concept_id	A foreign key that refers to a standard Payer concept identifier in the Standarized Vocabularies	integer	Yes	No	Yes	CONCEPT
payer_source_value	The source code for the payer as it appears in the source data.	varchar(50)	No	No	No
payer_source_concept_id	A foreign key to a payer concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT
plan_concept_id	A foreign key that refers to a standard plan concept identifier that represents the health benefit plan in the Standardized Vocabularies.	integer	Yes	No	Yes	CONCEPT
plan_source_value	The source code for the Person’s health benefit plan as it appears in the source data.	varchar(50)	No	No	No
plan_source_concept_id	A foreign key to a plan concept that refers to the plan code used in the source data.	integer	Yes	No	Yes	CONCEPT
contract_concept_id	A foreign key to a standard concept representing the reason justifying the contract between person_id and contract_person_id.	integer	Yes	No	Yes	CONCEPT
contract_source_value	The source code representing the reason justifying the contract. Usually it is family relationship like a spouse, domestic partner, child etc.	integer	No	No	No
contract_source_concept_id	A foreign key to a concept that refers to the code used in the source as the reason justifying the contract.	integer	Yes	No	Yes	CONCEPT
sponsor_concept_id	A foreign key that refers to a concept identifier that represents the sponsor in the Standardized Vocabularies.	integer	Yes	No	Yes	CONCEPT
sponsor_source_value	The source code for the Person’s sponsor of the health plan as it appears in the source data.	varchar(50)	No	No	No
sponsor_source_concept_id	A foreign key to a sponsor concept that refers to the sponsor code used in the source data.	integer	Yes	No	Yes	CONCEPT
family_source_value	The source code for the Person’s family as it appears in the source data.	varchar(50)	No	No	No
stop_reason_concept_id	A foreign key that refers to a standard termination reason that represents the reason for the termination in the Standardized Vocabularies.	integer	Yes	No	Yes	CONCEPT
stop_reason_source_value	The reason for stop-coverage as it appears in the source data.	varchar(50)	No	No	No
stop_reason_source_concept_id	A foreign key to a stop-coverage concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT

COST

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table
cost_id	A unique identifier for each COST record.	integer	Yes	Yes	No
person_id	A unique identifier for each PERSON.	integer	Yes	No	Yes	PERSON
cost_event_id	A foreign key identifier to the event (e.g. Measurement, Procedure, Visit, Drug Exposure, etc) record for which cost data are recorded.	integer	Yes	No	No
cost_event_field_concept_id	A foreign key identifier to a concept in the CONCEPT table representing the identity of the field represented by COST_EVENT_ID	integer	Yes	No	Yes	CONCEPT
cost_concept_id	A foreign key that refers to a Standard Cost Concept identifier in the Standardized Vocabularies belonging to the ‘Cost’ vocabulary.	integer	Yes	No	Yes	CONCEPT
cost_type_concept_id	A foreign key identifier to a concept in the CONCEPT table for the provenance or the source of the COST data and belonging to the ‘Cost Type’ vocabulary	integer	Yes	No	Yes	CONCEPT
cost_source_concept_id	A foreign key to a Cost Concept that refers to the code used in the source.	integer	Yes	No	Yes	CONCEPT
cost_source_value	The source value for the cost as it appears in the source data	varchar(50)	No	No	No
currency_concept_id	A foreign key identifier to the concept representing the 3-letter code used to delineate international currencies, such as USD for US Dollar. These belong to the ‘Currency’ vocabulary	integer	Yes	No	Yes	CONCEPT
cost	The actual financial cost amount	float	Yes	No	No
incurred_date	The first date of service of the clinical event corresponding to the cost as in table capturing the information (e.g. date of visit, date of procedure, date of condition, date of drug etc).	date	Yes	No	No
billed_date	The date a bill was generated for a service or encounter	date	No	No	No
paid_date	The date payment was received for a service or encounter	date	No	No	No
revenue_code_concept_id	A foreign key referring to a Standard Concept ID in the Standardized Vocabularies for Revenue codes belonging to the ‘Revenue Code’ vocabulary.	integer	Yes	No	Yes	CONCEPT
drg_concept_id	A foreign key referring to a Standard Concept ID in the Standardized Vocabularies for DRG codes belonging to the ‘DRG’ vocabulary.	integer	Yes	No	Yes
revenue_code_source_value	The source value for the Revenue code as it appears in the source data, stored here for reference.	varchar(50)	No	No	No
drg_source_value	The source value for the 3-digit DRG source code as it appears in the source data, stored here for reference.	varchar(50)	No	No	No
payer_plan_period_id	A foreign key to the PAYER_PLAN_PERIOD table, where the details of the Payer, Plan and Family are stored. Record the payer_plan_id that relates to the payer who contributed to the paid_by_payer field.	integer	No	No	Yes

DRUG_ERA

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain	FK Class
drug_era_id	A unique identifier for each Drug Era.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person who is subjected to the Drug during the fDrug Era. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	Yes	PERSON
drug_concept_id	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies for the Ingredient Concept.	integer	Yes	No	Yes	CONCEPT	Drug	Ingredient
drug_era_start_datetime	The start date for the Drug Era constructed from the individual instances of Drug Exposures. It is the start date of the very first chronologically recorded instance of conutilization of a Drug.	datetime	Yes	No	No
drug_era_end_datetime	The end date for the drug era constructed from the individual instance of drug exposures. It is the end date of the final continuously recorded instance of utilization of a drug.	datetime	Yes	No	No
drug_exposure_count	The number of individual Drug Exposure occurrences used to construct the Drug Era.	integer	No	No	No
gap_days	The number of days that are not covered by DRUG_EXPOSURE records that wer	integer	No	No	No

DOSE_ERA

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain	FK Class
dose_era_id	A unique identifier for each Dose Era.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person who is subjected to the drug during the drug era. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	Yes	PERSON
drug_concept_id	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies for the active Ingredient Concept.	integer	Yes	No	Yes	CONCEPT	Drug	Ingredient
unit_concept_id	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies for the unit concept.	integer	Yes	No	Yes	CONCEPT	Unit
dose_value	The numeric value of the dose.	float	Yes	No	No
dose_era_start_datetime	The start date for the drug era constructed from the individual instances of drug exposures. It is the start date of the very first chronologically recorded instance of utilization of a drug.	datetime	Yes	No	No
dose_era_end_datetime	The end date for the drug era constructed from the individual instance of drug exposures. It is the end date of the final continuously recorded instance of utilization of a drug.	datetime	Yes	No	No

CONDITION_ERA

CDM Field	User Guide	Datatype	Required	Primary Key	Foreign Key (FK)	FK Table	FK Domain
condition_era_id	A unique identifier for each Condition Era.	integer	Yes	Yes	No
person_id	A foreign key identifier to the Person who is experiencing the Condition during the Condition Era. The demographic details of that Person are stored in the PERSON table.	integer	Yes	No	No	PERSON
condition_concept_id	A foreign key that refers to a standard Condition Concept identifier in the Standardized Vocabularies.	integer	Yes	No	No	CONCEPT	Condition
condition_era_start_datetime	The start date for the Condition Era constructed from the individual instances of Condition Occurrences. It is the start date of the very first chronologically recorded instance of the condition.	datetime	Yes	No	No
condition_era_end_datetime	The end date for the Condition Era constructed from the individual instances of Condition Occurrences. It is the end date of the final continuously recorded instance of the Condition.	datetime	Yes	No	No
condition_occurrence_count	The number of individual Condition Occurrences used to construct the condition era.	integer	No	No	No