K31.A11 vs K57.00
K31.A11 (Gastric intestinal metaplasia without dysplasia, involving the antrum) compared with K57.00 (Diverticulitis of small intestine with perforation and abscess without bleeding), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. K31.A11 carries an Excludes2 note covering K57.00: “diverticulum of duodenum (K57.00-K57.13)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| K31.A11Gastric intestinal metaplasia without dysplasia, involving the antrum | K57.00Diverticulitis of small intestine with perforation and abscess without bleeding | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Gastric intestinal metaplasia without dysplasia, involving the antrum is a billable ICD-10-CM diagnosis code (K31.A11). | Diverticulitis of small intestine with perforation and abscess without bleeding is a billable ICD-10-CM diagnosis code (K57.00). |
| 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