ICD-10-CM > M00-M99 > M60-M63 > M60 > M60.1 M60.1 Interstitial myositis Non-Billable/Non-Specific Codes M60.10Interstitial myositis of unspecified siteM60.11Interstitial myositis, shoulderM60.111Interstitial myositis, right shoulderM60.112Interstitial myositis, left shoulderM60.119Interstitial myositis, unspecified shoulderM60.12Interstitial myositis, upper armM60.121Interstitial myositis, right upper armM60.122Interstitial myositis, left upper armM60.129Interstitial myositis, unspecified upper armM60.13Interstitial myositis, forearmM60.131Interstitial myositis, right forearmM60.132Interstitial myositis, left forearmM60.139Interstitial myositis, unspecified forearmM60.14Interstitial myositis, handM60.141Interstitial myositis, right handM60.142Interstitial myositis, left handM60.149Interstitial myositis, unspecified handM60.15Interstitial myositis, thighM60.151Interstitial myositis, right thighM60.152Interstitial myositis, left thighM60.159Interstitial myositis, unspecified thighM60.16Interstitial myositis, lower legM60.161Interstitial myositis, right lower legM60.162Interstitial myositis, left lower legM60.169Interstitial myositis, unspecified lower legM60.17Interstitial myositis, ankle and footM60.171Interstitial myositis, right ankle and footM60.172Interstitial myositis, left ankle and footM60.179Interstitial myositis, unspecified ankle and footM60.18Interstitial myositis, other siteM60.19Interstitial myositis, multiple sites