ICD-10-CM > M00-M99 > M60-M63 > M60 > M60.8 M60.8 Other myositis Non-Billable/Non-Specific Codes M60.80Other myositis, unspecified siteM60.81Other myositis shoulderM60.811Other myositis, right shoulderM60.812Other myositis, left shoulderM60.819Other myositis, unspecified shoulderM60.82Other myositis, upper armM60.821Other myositis, right upper armM60.822Other myositis, left upper armM60.829Other myositis, unspecified upper armM60.83Other myositis, forearmM60.831Other myositis, right forearmM60.832Other myositis, left forearmM60.839Other myositis, unspecified forearmM60.84Other myositis, handM60.841Other myositis, right handM60.842Other myositis, left handM60.849Other myositis, unspecified handM60.85Other myositis, thighM60.851Other myositis, right thighM60.852Other myositis, left thighM60.859Other myositis, unspecified thighM60.86Other myositis, lower legM60.861Other myositis, right lower legM60.862Other myositis, left lower legM60.869Other myositis, unspecified lower legM60.87Other myositis, ankle and footM60.871Other myositis, right ankle and footM60.872Other myositis, left ankle and footM60.879Other myositis, unspecified ankle and footM60.88Other myositis, other siteM60.89Other myositis, multiple sites