M80 vs M84.40XK
M80 (Osteoporosis with current pathological fracture) compared with M84.40XK (Pathological fracture, unspecified site, subsequent encounter for fracture with nonunion), 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. M80 carries an Excludes1 note covering M84.40XK: “pathological fracture NOS (M84.4)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. M84.40XK carries an Excludes1 note covering M80: “pathological fracture in osteoporosis (M80.-)”
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
| M80Osteoporosis with current pathological fracture | M84.40XKPathological fracture, unspecified site, subsequent encounter for fracture with nonunion | |
|---|---|---|
| Billing status | Non-billable header Report instead: M80.00XA, M80.00XD, M80.00XG, M80.00XK, M80.00XP | 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 | Osteoporosis with current pathological fracture is a non-billable ICD-10-CM category code (M80). | Pathological fracture, unspecified site, subsequent encounter for fracture with nonunion is a billable ICD-10-CM diagnosis code (M84.40K). |
| 7th character | The appropriate 7th character is to be added to each code from category M80: | The appropriate 7th character is to be added to each code from subcategory M84.4: |
| Includes | osteoporosis with current fragility fracture | — |
| Use additional code | code to identify major osseous defect, if applicable (M89.7-) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources