ICD-10-CM category
M63: Disorders of muscle in diseases classified elsewhere
Codes under M63 (Disorders of muscle in diseases classified elsewhere). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| M63.8 | Disorders of muscle in diseases classified elsewhere | — |
| M63.8 | Disorders of muscle in diseases classified elsewhere | — |
| M63.80 | Disorders of muscle in diseases classified elsewhere, unspecified site | ✓ |
| M63.80 | Disorders of muscle in diseases classified elsewhere, unspecified site | ✓ |
| M63.81 | Disorders of muscle in diseases classified elsewhere, shoulder | — |
| M63.81 | Disorders of muscle in diseases classified elsewhere, shoulder | — |
| M63.82 | Disorders of muscle in diseases classified elsewhere, upper arm | — |
| M63.82 | Disorders of muscle in diseases classified elsewhere, upper arm | — |
| M63.83 | Disorders of muscle in diseases classified elsewhere, forearm | — |
| M63.83 | Disorders of muscle in diseases classified elsewhere, forearm | — |
| M63.84 | Disorders of muscle in diseases classified elsewhere, hand | — |
| M63.84 | Disorders of muscle in diseases classified elsewhere, hand | — |
| M63.85 | Disorders of muscle in diseases classified elsewhere, thigh | — |
| M63.85 | Disorders of muscle in diseases classified elsewhere, thigh | — |
| M63.86 | Disorders of muscle in diseases classified elsewhere, lower leg | — |
| M63.86 | Disorders of muscle in diseases classified elsewhere, lower leg | — |
| M63.87 | Disorders of muscle in diseases classified elsewhere, ankle and foot | — |
| M63.87 | Disorders of muscle in diseases classified elsewhere, ankle and foot | — |
| M63.88 | Disorders of muscle in diseases classified elsewhere, other site | ✓ |
| M63.88 | Disorders of muscle in diseases classified elsewhere, other site | ✓ |
| M63.89 | Disorders of muscle in diseases classified elsewhere, multiple sites | ✓ |
| M63.89 | Disorders of muscle in diseases classified elsewhere, multiple sites | ✓ |
| M63.811 | Disorders of muscle in diseases classified elsewhere, right shoulder | ✓ |
| M63.811 | Disorders of muscle in diseases classified elsewhere, right shoulder | ✓ |
| M63.812 | Disorders of muscle in diseases classified elsewhere, left shoulder | ✓ |
| M63.812 | Disorders of muscle in diseases classified elsewhere, left shoulder | ✓ |
| M63.819 | Disorders of muscle in diseases classified elsewhere, unspecified shoulder | ✓ |
| M63.819 | Disorders of muscle in diseases classified elsewhere, unspecified shoulder | ✓ |
| M63.821 | Disorders of muscle in diseases classified elsewhere, right upper arm | ✓ |
| M63.821 | Disorders of muscle in diseases classified elsewhere, right upper arm | ✓ |
| M63.822 | Disorders of muscle in diseases classified elsewhere, left upper arm | ✓ |
| M63.822 | Disorders of muscle in diseases classified elsewhere, left upper arm | ✓ |
| M63.829 | Disorders of muscle in diseases classified elsewhere, unspecified upper arm | ✓ |
| M63.829 | Disorders of muscle in diseases classified elsewhere, unspecified upper arm | ✓ |
| M63.831 | Disorders of muscle in diseases classified elsewhere, right forearm | ✓ |
| M63.831 | Disorders of muscle in diseases classified elsewhere, right forearm | ✓ |
| M63.832 | Disorders of muscle in diseases classified elsewhere, left forearm | ✓ |
| M63.832 | Disorders of muscle in diseases classified elsewhere, left forearm | ✓ |
| M63.839 | Disorders of muscle in diseases classified elsewhere, unspecified forearm | ✓ |
| M63.839 | Disorders of muscle in diseases classified elsewhere, unspecified forearm | ✓ |
| M63.841 | Disorders of muscle in diseases classified elsewhere, right hand | ✓ |
| M63.841 | Disorders of muscle in diseases classified elsewhere, right hand | ✓ |
| M63.842 | Disorders of muscle in diseases classified elsewhere, left hand | ✓ |
| M63.842 | Disorders of muscle in diseases classified elsewhere, left hand | ✓ |
| M63.849 | Disorders of muscle in diseases classified elsewhere, unspecified hand | ✓ |
| M63.849 | Disorders of muscle in diseases classified elsewhere, unspecified hand | ✓ |
| M63.851 | Disorders of muscle in diseases classified elsewhere, right thigh | ✓ |
| M63.851 | Disorders of muscle in diseases classified elsewhere, right thigh | ✓ |
| M63.852 | Disorders of muscle in diseases classified elsewhere, left thigh | ✓ |
| M63.852 | Disorders of muscle in diseases classified elsewhere, left thigh | ✓ |
| M63.859 | Disorders of muscle in diseases classified elsewhere, unspecified thigh | ✓ |
| M63.859 | Disorders of muscle in diseases classified elsewhere, unspecified thigh | ✓ |
| M63.861 | Disorders of muscle in diseases classified elsewhere, right lower leg | ✓ |
| M63.861 | Disorders of muscle in diseases classified elsewhere, right lower leg | ✓ |
| M63.862 | Disorders of muscle in diseases classified elsewhere, left lower leg | ✓ |
| M63.862 | Disorders of muscle in diseases classified elsewhere, left lower leg | ✓ |
| M63.869 | Disorders of muscle in diseases classified elsewhere, unspecified lower leg | ✓ |
| M63.869 | Disorders of muscle in diseases classified elsewhere, unspecified lower leg | ✓ |
| M63.871 | Disorders of muscle in diseases classified elsewhere, right ankle and foot | ✓ |
| M63.871 | Disorders of muscle in diseases classified elsewhere, right ankle and foot | ✓ |
| M63.872 | Disorders of muscle in diseases classified elsewhere, left ankle and foot | ✓ |
| M63.872 | Disorders of muscle in diseases classified elsewhere, left ankle and foot | ✓ |
| M63.879 | Disorders of muscle in diseases classified elsewhere, unspecified ankle and foot | ✓ |
| M63.879 | Disorders of muscle in diseases classified elsewhere, unspecified ankle and foot | ✓ |
Frequently asked questions
What is ICD-10-CM code M63?
M63 is an ICD-10-CM category covering Disorders of muscle in diseases classified elsewhere. It contains 64 more specific diagnosis codes, 48 of which are billable.
Is M63 a billable code?
No — M63 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example M63.8 — Disorders of muscle in diseases classified elsewhere). 48 of the 64 codes under M63 are billable.
What codes fall under M63?
M63 includes M63.8, M63.8, M63.80, M63.80, M63.81, plus 59 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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