ICD-10-CM > M00-M99 > M86-M90 > M90 > M90.8 > M90.83 M90.83 Osteopathy in diseases classified elsewhere, forearm Non-Billable/Non-Specific Codes M90.831Osteopathy in diseases classified elsewhere, right forearmM90.832Osteopathy in diseases classified elsewhere, left forearmM90.839Osteopathy in diseases classified elsewhere, unspecified forearm