ICD-10-CM > M00-M99 > M60-M63 > M60 > M60.0 > M60.02 M60.02 Infective myositis, upper arm Non-Billable/Non-Specific Codes M60.021Infective myositis, right upper armM60.022Infective myositis, left upper armM60.029Infective myositis, unspecified upper arm