M86.651 (Other chronic osteomyelitis, right thigh) compared with M86.659 (Other chronic osteomyelitis, unspecified thigh), from the official CMS tabular data. M86.651 and M86.659 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. M86.651 and M86.659 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.
| M86.651Other chronic osteomyelitis, right thigh | M86.659Other chronic osteomyelitis, unspecified thigh | |
|---|---|---|
| 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 chronic osteomyelitis, right thigh is a billable ICD-10-CM diagnosis code (M86.651). | Other chronic osteomyelitis, unspecified thigh is a billable ICD-10-CM diagnosis code (M86.659). |
| Use additional code | code (B95-B97) to identify infectious agent code to identify major osseous defect, if applicable (M89.7-) | code (B95-B97) to identify infectious agent code to identify major osseous defect, if applicable (M89.7-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources