ICD-10-CM · Chapter 11 · K00-K95
K26 Duodenal ulcer
Includes
- erosion (acute) of duodenum
- duodenum ulcer (peptic)
- postpyloric ulcer (peptic)
Excludes 1 (cannot be coded together)
- peptic ulcer NOS (K27.-)
Use Additional Code
- code to identify:
- alcohol abuse and dependence (F10.-)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| K26..0 | Acute duodenal ulcer with hemorrhage | Yes |
| K26..1 | Acute duodenal ulcer with perforation | Yes |
| K26..2 | Acute duodenal ulcer with both hemorrhage and perforation | Yes |
| K26..3 | Acute duodenal ulcer without hemorrhage or perforation | Yes |
| K26..4 | Chronic or unspecified duodenal ulcer with hemorrhage | Yes |
| K26..5 | Chronic or unspecified duodenal ulcer with perforation | Yes |
| K26..6 | Chronic or unspecified duodenal ulcer with both hemorrhage and perforation | Yes |
| K26..7 | Chronic duodenal ulcer without hemorrhage or perforation | Yes |
| K26..9 | Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation | Yes |
Last reviewed: September 2026