M84.521 (Pathological fracture in neoplastic disease, right humerus) compared with M84.522 (Pathological fracture in neoplastic disease, left humerus), from the official CMS tabular data. M84.521 and M84.522 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. M84.521 and M84.522 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.
| M84.521Pathological fracture in neoplastic disease, right humerus | M84.522Pathological fracture in neoplastic disease, left humerus | |
|---|---|---|
| Billing status | Non-billable header Report instead: M84.521A, M84.521D, M84.521G, M84.521K, M84.521P | Non-billable header Report instead: M84.522A, M84.522D, M84.522G, M84.522K, M84.522P |
| 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 | Pathological fracture in neoplastic disease, right humerus is a non-billable ICD-10-CM category code (M84.521). | Pathological fracture in neoplastic disease, left humerus is a non-billable ICD-10-CM category code (M84.522). |
| 7th character | The appropriate 7th character is to be added to each code from subcategory M84.5: | The appropriate 7th character is to be added to each code from subcategory M84.5: |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources