M21 vs M95
M21 (Other acquired deformities of limbs) compared with M95 (Other acquired deformities of musculoskeletal system and connective tissue), 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. M95 carries an Excludes2 note covering M21: “acquired deformities of limbs (M20-M21)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| M21Other acquired deformities of limbs | M95Other acquired deformities of musculoskeletal system and connective tissue | |
|---|---|---|
| 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 | Other acquired deformities of limbs is a non-billable ICD-10-CM category code (M21). | Other acquired deformities of musculoskeletal system and connective tissue is a non-billable ICD-10-CM category code (M95). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources