M84.477 (Pathological fracture, right toe(s)) compared with M84.479 (Pathological fracture, unspecified toe(s)), from the official CMS tabular data. M84.477 and M84.479 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. M84.477 and M84.479 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.
| M84.477Pathological fracture, right toe(s) | M84.479Pathological fracture, unspecified toe(s) | |
|---|---|---|
| Billing status | Non-billable header Report instead: M84.477A, M84.477D, M84.477G, M84.477K, M84.477P | Non-billable header Report instead: M84.479A, M84.479D, M84.479G, M84.479K, M84.479P |
| 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, right toe(s) is a non-billable ICD-10-CM category code (M84.477). | Pathological fracture, unspecified toe(s) is a non-billable ICD-10-CM category code (M84.479). |
| 7th character | The appropriate 7th character is to be added to each code from subcategory M84.4: | The appropriate 7th character is to be added to each code from subcategory M84.4: |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources