ICD-10-CM > M00-M99 > M86-M90 > M90 > M90.5 > M90.52 M90.52 Osteonecrosis in diseases classified elsewhere, upper arm Non-Billable/Non-Specific Codes M90.521Osteonecrosis in diseases classified elsewhere, right upper armM90.522Osteonecrosis in diseases classified elsewhere, left upper armM90.529Osteonecrosis in diseases classified elsewhere, unspecified upper arm