ICD-10-CM > M00-M99 > M86-M90 > M90 > M90.5 > M90.53 M90.53 Osteonecrosis in diseases classified elsewhere, forearm Non-Billable/Non-Specific Codes M90.531Osteonecrosis in diseases classified elsewhere, right forearmM90.532Osteonecrosis in diseases classified elsewhere, left forearmM90.539Osteonecrosis in diseases classified elsewhere, unspecified forearm