ICD-10-CM > M00-M99 > M60-M63 > M60 > M60.1 > M60.11 M60.11 Interstitial myositis, shoulder Non-Billable/Non-Specific Codes M60.111Interstitial myositis, right shoulderM60.112Interstitial myositis, left shoulderM60.119Interstitial myositis, unspecified shoulder