M21.831 (Other specified acquired deformities of right forearm) compared with M21.832 (Other specified acquired deformities of left forearm), from the official CMS tabular data. M21.831 and M21.832 code the same condition on opposite sides. MedCoder-derived
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. M21.831 and M21.832 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.
| M21.831Other specified acquired deformities of right forearm | M21.832Other specified acquired deformities of left forearm | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | M00-M99 — Diseases of the musculoskeletal system and connective tissue | M00-M99 — Diseases of the musculoskeletal system and connective tissue |
| Definition | Other specified acquired deformities of right forearm is a billable ICD-10-CM diagnosis code (M21.831). | Other specified acquired deformities of left forearm is a billable ICD-10-CM diagnosis code (M21.832). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources