diff --git a/edi/parser.py b/edi/parser.py
index 6f39f92..17215c2 100644
--- a/edi/parser.py
+++ b/edi/parser.py
@@ -72,7 +72,7 @@ def format_time(value):
     return ":".join([value[:2],value[2:] ])[:5]
 def format_proc(value):
     if ':' in value :
-        return {"procedure_type":value.split(':')[0].strip(),"procedure_code":value.split(':')[1].strip()}
+        return {"type":value.split(':')[0].strip(),"code":value.split(':')[1].strip()}
     else:
         return value
 def format_diag(value):