K91.2 vs M80
K91.2 and M80 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
Postsurgical malabsorption, not elsewhere classified
- Chapter 11
- Diseases of the digestive system
- Section
- K90-K95
- Postsurgical blind loop syndrome
- Tachyalimentation
- Malabsorption › postgastrectomy
- Malabsorption › postsurgical
- Malnutrition › following gastrointestinal surgery
- Complication › surgical procedure › malabsorptionNEC (s) (from) (of)
Osteoporosis with current pathological fracture
- Chapter 13
- Diseases of the musculoskeletal system and connective tissue
- Section
- M80-M85
- osteoporosis with current fragility fracture
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027