Convert ICD-10 Code M18.50 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
M18.50 Oth unil sec osteoarth of 1st carpometacarp joint, unsp hand		715.24 Loc 2nd osteoarthro-hand
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 M18.50 - other unilateral secondary osteoarthritis of first carpometacarpal joint, unspecified hand based on the most recent General Equivalence Mappings (GEMS) information.