M12.041 (Chronic postrheumatic arthropathy [Jaccoud], right hand) compared with M12.049 (Chronic postrheumatic arthropathy [Jaccoud], unspecified hand), from the official CMS tabular data. M12.041 and M12.049 code the same condition on opposite sides.
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. M12.041 and M12.049 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.
| M12.041Chronic postrheumatic arthropathy [Jaccoud], right hand | M12.049Chronic postrheumatic arthropathy [Jaccoud], unspecified hand | |
|---|---|---|
| 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 | Chronic postrheumatic arthropathy [Jaccoud], right hand is a billable ICD-10-CM diagnosis code (M12.041). | Chronic postrheumatic arthropathy [Jaccoud], unspecified hand is a billable ICD-10-CM diagnosis code (M12.049). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources