M24.6 vs M43.2
M24.6 (Ankylosis of joint) compared with M43.2 (Fusion of spine), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. M24.6 carries an Excludes2 note covering M43.2: “spine (M43.2-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| M24.6Ankylosis of joint | M43.2Fusion of spine | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| 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 | Ankylosis of joint is a non-billable ICD-10-CM category code (M24.6). | Fusion of spine is a non-billable ICD-10-CM category code (M43.2). |
| Includes | — | Ankylosis of spinal joint |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources