ICD-10-CM > M00-M99 > M60-M63 > M61 > M61.4 > M61.42 M61.42 Other calcification of muscle, upper arm Non-Billable/Non-Specific Codes M61.421Other calcification of muscle, right upper armM61.422Other calcification of muscle, left upper armM61.429Other calcification of muscle, unspecified upper arm