ICD-10-CM > M00-M99 > M60-M63 > M62 > M62.4 > M62.42 M62.42 Contracture of muscle, upper arm Non-Billable/Non-Specific Codes M62.421Contracture of muscle, right upper armM62.422Contracture of muscle, left upper armM62.429Contracture of muscle, unspecified upper arm