ICD-10-CM > M00-M99 > M60-M63 > M62 > M62.1 > M62.13 M62.13 Other rupture of muscle (nontraumatic), forearm Non-Billable/Non-Specific Codes M62.131Other rupture of muscle (nontraumatic), right forearmM62.132Other rupture of muscle (nontraumatic), left forearmM62.139Other rupture of muscle (nontraumatic), unspecified forearm