M85.451 (Solitary bone cyst, right pelvis) compared with M85.459 (Solitary bone cyst, unspecified pelvis), from the official CMS tabular data. M85.451 and M85.459 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. M85.451 and M85.459 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.
| M85.451Solitary bone cyst, right pelvis | M85.459Solitary bone cyst, unspecified pelvis | |
|---|---|---|
| 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 | Solitary bone cyst, right pelvis is a billable ICD-10-CM diagnosis code (M85.451). | Solitary bone cyst, unspecified pelvis is a billable ICD-10-CM diagnosis code (M85.459). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources