M79.7 vs T79.A
M79.7 (Fibromyalgia) compared with T79.A (Traumatic compartment syndrome), 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. T79.A carries an Excludes1 note covering M79.7: “fibromyalgia (M79.7)”
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
| M79.7Fibromyalgia | T79.ATraumatic compartment syndrome | |
|---|---|---|
| Billing status | Billable | Non-billable header Report instead: T79.A0XA, T79.A0XD, T79.A0XS, T79.A11A, T79.A11D |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Fibromyalgia is a billable ICD-10-CM diagnosis code (M79.7). | Traumatic compartment syndrome is a non-billable ICD-10-CM category code (T79.A). |
| 7th character | — | The appropriate 7th character is to be added to each code from category T79 |
| Includes | Fibromyositis Fibrositis Myofibrositis | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources