K91.2 vs M80.8
K91.2 (Postsurgical malabsorption, not elsewhere classified) compared with M80.8 (Other osteoporosis with current pathological fracture), 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. K91.2 carries an Excludes1 note covering M80.8: “malabsorption osteoporosis, postsurgical (M80.8-, M81.8)”
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
| K91.2Postsurgical malabsorption, not elsewhere classified | M80.8Other osteoporosis with current pathological fracture | |
|---|---|---|
| Billing status | Billable | Non-billable header Report instead: M80.80XA, M80.80XD, M80.80XG, M80.80XK, M80.80XP |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Postsurgical malabsorption, not elsewhere classified is a billable ICD-10-CM diagnosis code (K91.2). | Other osteoporosis with current pathological fracture is a non-billable ICD-10-CM category code (M80.8). |
| 7th character | — | The appropriate 7th character is to be added to each code from category M80: |
| Includes | Postsurgical blind loop syndrome | osteoporosis with current fragility fracture Drug-induced osteoporosis with current pathological fracture Idiopathic osteoporosis with current pathological fracture Osteoporosis of disuse with current pathological fracture |
| Use additional code | — | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) 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