M48.51XA vs M84.58
M48.51XA (Collapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, initial encounter for fracture) compared with M84.58 (Pathological fracture in neoplastic disease, other specified site), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. M48.51XA carries an Excludes1 note covering M84.58: “pathological fracture of vertebra due to neoplasm (M84.58)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| M48.51XACollapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, initial encounter for fracture | M84.58Pathological fracture in neoplastic disease, other specified site | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| 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 | Collapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, initial encounter for fracture is a billable ICD-10-CM diagnosis code (M48.51A). | Pathological fracture in neoplastic disease, other specified site is a non-billable ICD-10-CM category code (M84.58). |
| 7th character | The appropriate 7th character is to be added to each code from subcategory M48.5: | The appropriate 7th character is to be added to each code from subcategory M84.5: |
| Includes | — | Pathological fracture in neoplastic disease, vertebrae |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources