M12.851 (Other specific arthropathies, not elsewhere classified, right hip) compared with M12.859 (Other specific arthropathies, not elsewhere classified, unspecified hip), from the official CMS tabular data. M12.851 and M12.859 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. M12.851 and M12.859 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.
| M12.851Other specific arthropathies, not elsewhere classified, right hip | M12.859Other specific arthropathies, not elsewhere classified, unspecified hip | |
|---|---|---|
| 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 specific arthropathies, not elsewhere classified, right hip is a billable ICD-10-CM diagnosis code (M12.851). | Other specific arthropathies, not elsewhere classified, unspecified hip is a billable ICD-10-CM diagnosis code (M12.859). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources