ICD-10-CM > M00-M99 > M86-M90 > M90 > M90.5 > M90.51 M90.51 Osteonecrosis in diseases classified elsewhere, shoulder Non-Billable/Non-Specific Codes M90.511Osteonecrosis in diseases classified elsewhere, right shoulderM90.512Osteonecrosis in diseases classified elsewhere, left shoulderM90.519Osteonecrosis in diseases classified elsewhere, unspecified shoulder