K31.A1 vs K57.00
K31.A1 (Gastric intestinal metaplasia without dysplasia) 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.A1 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.A1Gastric intestinal metaplasia without dysplasia | K57.00Diverticulitis of small intestine with perforation and abscess without bleeding | |
|---|---|---|
| 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 | Gastric intestinal metaplasia without dysplasia is a non-billable ICD-10-CM category code (K31.A1). | 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