M20.021 vs M20.029
M20.021 (Boutonnière deformity of right finger(s)) compared with M20.029 (Boutonnière deformity of unspecified finger(s)), from the official CMS tabular data. M20.021 and M20.029 code the same condition on opposite sides.
Can these codes be reported together?
Same condition, opposite side. M20.021 and M20.029 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
Side by side
| M20.021Boutonnière deformity of right finger(s) | M20.029Boutonnière deformity of unspecified finger(s) | |
|---|---|---|
| Billing status | Billable | 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 | Boutonnière deformity of right finger(s) is a billable ICD-10-CM diagnosis code (M20.021). | Boutonnière deformity of unspecified finger(s) is a billable ICD-10-CM diagnosis code (M20.029). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources