ICD-10-CM > M00-M99 > M60-M63 > M61 > M61.4 > M61.43 M61.43 Other calcification of muscle, forearm Non-Billable/Non-Specific Codes M61.431Other calcification of muscle, right forearmM61.432Other calcification of muscle, left forearmM61.439Other calcification of muscle, unspecified forearm