K31.81 (Angiodysplasia of stomach and duodenum) compared with K55.021 (Focal (segmental) acute infarction of small intestine), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Distinct conditions — both may be reported.
“angioectasia (angiodysplasia) duodenum (K31.81-)”
An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.
Source: CMS ICD-10-CM tabular instructional notes
Yes, when both are documented. K55.021 carries an Excludes2 note covering K31.81: “angioectasia (angiodysplasia) duodenum (K31.81-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
| K31.81Angiodysplasia of stomach and duodenum | K55.021Focal (segmental) acute infarction of small intestine | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Angiodysplasia of stomach and duodenum is a non-billable ICD-10-CM category code (K31.81). | Focal (segmental) acute infarction of small intestine is a billable ICD-10-CM diagnosis code (K55.021). |
| Includes | functional disorders of stomach | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources