A18.09 vs M63
A18.09 (Other musculoskeletal tuberculosis) compared with M63 (Disorders of muscle in diseases classified elsewhere), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. M63 carries an Excludes1 note covering A18.09: “myopathy in tuberculosis (A18.09)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| A18.09Other musculoskeletal tuberculosis | M63Disorders of muscle in diseases classified elsewhere | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Other musculoskeletal tuberculosis is a billable ICD-10-CM diagnosis code (A18.09). | Disorders of muscle in diseases classified elsewhere is a non-billable ICD-10-CM category code (M63). |
| Includes | infections due to Mycobacterium tuberculosis and Mycobacterium bovis Tuberculous myositis Tuberculous synovitis Tuberculous tenosynovitis | — |
| Use additional code | code, if applicable, for associated cachexia (E88.A) | — |
| Code first | — | underlying disease, such as: leprosy (A30.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources