M90.551 (Osteonecrosis in diseases classified elsewhere, right thigh) compared with M90.552 (Osteonecrosis in diseases classified elsewhere, left thigh), from the official CMS tabular data. M90.551 and M90.552 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. M90.551 and M90.552 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.
| M90.551Osteonecrosis in diseases classified elsewhere, right thigh | M90.552Osteonecrosis in diseases classified elsewhere, left 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 | Osteonecrosis in diseases classified elsewhere, right thigh is a billable ICD-10-CM diagnosis code (M90.551). | Osteonecrosis in diseases classified elsewhere, left thigh is a billable ICD-10-CM diagnosis code (M90.552). |
| Code first | underlying disease, such as: caisson disease (T70.3) | underlying disease, such as: caisson disease (T70.3) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources