Convert ICD-10 Code I20.0 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
I20.0 Unstable angina		411.1 Intermed coronary synd
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

ICD-10 to ICD-9 crosswalk for code I20.0 - unstable angina based on the most recent General Equivalence Mappings (GEMS) information.