Convert ICD-10 Code M90.522 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
M90.522 Osteonecrosis in diseases classd elswhr, left upper arm		731.8 Bone involv in oth dis
Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.
M90.522 Osteonecrosis in diseases classd elswhr, left upper arm		733.49 Asept necrosis bone NEC
Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.

ICD-10 to ICD-9 crosswalk for code M90.522 - osteonecrosis in diseases classified elsewhere, left upper arm based on the most recent General Equivalence Mappings (GEMS) information.