ICD-10-CM · Chapter 11 · K00-K95
K31 Other diseases of stomach and duodenum
Includes
- functional disorders of stomach
Excludes 2 (not included here)
- diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
- diverticulum of duodenum (K57.00-K57.13)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| K31..0 | Acute dilatation of stomach | Yes |
| K31..1 | Adult hypertrophic pyloric stenosis | Yes |
| K31..B | Hypertrophic pyloric stenosis, in childhood | Yes |
| K31..2 | Hourglass stricture and stenosis of stomach | Yes |
| K31..3 | Pylorospasm, not elsewhere classified | Yes |
| K31..4 | Gastric diverticulum | Yes |
| K31..5 | Obstruction of duodenum | Yes |
| K31..6 | Fistula of stomach and duodenum | Yes |
| K31..7 | Polyp of stomach and duodenum | Yes |
| K31..8 | Other specified diseases of stomach and duodenum | No |
| K31..81 | Angiodysplasia of stomach and duodenum | No |
| K31..811 | Angiodysplasia of stomach and duodenum with bleeding | Yes |
| K31..819 | Angiodysplasia of stomach and duodenum without bleeding | Yes |
| K31..82 | Dieulafoy lesion (hemorrhagic) of stomach and duodenum | Yes |
| K31..83 | Achlorhydria | Yes |
| K31..84 | Gastroparesis | Yes |
| K31..89 | Other diseases of stomach and duodenum | Yes |
| K31..9 | Disease of stomach and duodenum, unspecified | Yes |
| K31..A | Gastric intestinal metaplasia | No |
| K31..A0 | Gastric intestinal metaplasia, unspecified | Yes |
| K31..A1 | Gastric intestinal metaplasia without dysplasia | No |
| K31..A11 | Gastric intestinal metaplasia without dysplasia, involving the antrum | Yes |
| K31..A12 | Gastric intestinal metaplasia without dysplasia, involving the body (corpus) | Yes |
| K31..A13 | Gastric intestinal metaplasia without dysplasia, involving the fundus | Yes |
| K31..A14 | Gastric intestinal metaplasia without dysplasia, involving the cardia | Yes |
| K31..A15 | Gastric intestinal metaplasia without dysplasia, involving multiple sites | Yes |
| K31..A19 | Gastric intestinal metaplasia without dysplasia, unspecified site | Yes |
| K31..A2 | Gastric intestinal metaplasia with dysplasia | No |
| K31..A21 | Gastric intestinal metaplasia with low grade dysplasia | Yes |
| K31..A22 | Gastric intestinal metaplasia with high grade dysplasia | Yes |
| K31..A29 | Gastric intestinal metaplasia with dysplasia, unspecified | Yes |
Last reviewed: September 2026