| ICD-10 Code | Description |
| M60.10 | Interstitial myositis of unspecified site |
| M60.111 | Interstitial myositis, right shoulder |
| M60.112 | Interstitial myositis, left shoulder |
| M60.119 | Interstitial myositis, unspecified shoulder |
| M60.121 | Interstitial myositis, right upper arm |
| M60.122 | Interstitial myositis, left upper arm |
| M60.129 | Interstitial myositis, unspecified upper arm |
| M60.131 | Interstitial myositis, right forearm |
| M60.132 | Interstitial myositis, left forearm |
| M60.139 | Interstitial myositis, unspecified forearm |
| M60.141 | Interstitial myositis, right hand |
| M60.142 | Interstitial myositis, left hand |
| M60.149 | Interstitial myositis, unspecified hand |
| M60.151 | Interstitial myositis, right thigh |
| M60.152 | Interstitial myositis, left thigh |
| M60.159 | Interstitial myositis, unspecified thigh |
| M60.161 | Interstitial myositis, right lower leg |
| M60.162 | Interstitial myositis, left lower leg |
| M60.169 | Interstitial myositis, unspecified lower leg |
| M60.171 | Interstitial myositis, right ankle and foot |
| M60.172 | Interstitial myositis, left ankle and foot |
| M60.179 | Interstitial myositis, unspecified ankle and foot |
| M60.18 | Interstitial myositis, other site |
| M60.19 | Interstitial myositis, multiple sites |
