Convert ICD-10 Code H21.263 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
H21.263 Iris atrophy (essential) (progressive), bilateral		364.51 Progressive iris atrophy
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 H21.263 - iris atrophy (essential) (progressive), bilateral based on the most recent General Equivalence Mappings (GEMS) information.