ICD-10-CM > M00-M99 > M60-M63 > M62 > M62.0 > M62.03 M62.03 Separation of muscle (nontraumatic), forearm Non-Billable/Non-Specific Codes M62.031Separation of muscle (nontraumatic), right forearmM62.032Separation of muscle (nontraumatic), left forearmM62.039Separation of muscle (nontraumatic), unspecified forearm