M06.861 (Other specified rheumatoid arthritis, right knee) compared with M06.869 (Other specified rheumatoid arthritis, unspecified knee), from the official CMS tabular data. M06.861 and M06.869 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. M06.861 and M06.869 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.
| M06.861Other specified rheumatoid arthritis, right knee | M06.869Other specified rheumatoid arthritis, unspecified knee | |
|---|---|---|
| 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 | Other specified rheumatoid arthritis, right knee is a billable ICD-10-CM diagnosis code (M06.861). | Other specified rheumatoid arthritis, unspecified knee is a billable ICD-10-CM diagnosis code (M06.869). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources