M67 vs M77.9
M67 (Other disorders of synovium and tendon) compared with M77.9 (Enthesopathy, unspecified), 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. M67 carries an Excludes1 note covering M77.9: “tendinitis NOS (M77.9-)”
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
| M67Other disorders of synovium and tendon | M77.9Enthesopathy, unspecified | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Other disorders of synovium and tendon is a non-billable ICD-10-CM category code (M67). | Enthesopathy, unspecified is a billable ICD-10-CM diagnosis code (M77.9). |
| Includes | — | Bone spur NOS Capsulitis NOS Periarthritis NOS Tendinitis NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources