K26Header code — not billable
Duodenal ulcer
- Chapter
- 11. Diseases of the digestive system
- Category
- K26
- Effective date
- October 1, 2026
Related codes in category K26
K26.0Acute duodenal ulcer with hemorrhageYesK26.1Acute duodenal ulcer with perforationYesK26.2Acute duodenal ulcer with both hemorrhage and perforationYesK26.3Acute duodenal ulcer without hemorrhage or perforationYesK26.4Chronic or unspecified duodenal ulcer with hemorrhageYesK26.5Chronic or unspecified duodenal ulcer with perforationYesK26.6Chronic or unsp duodenal ulcer w both hemorrhage and perfYesK26.7Chronic duodenal ulcer without hemorrhage or perforationYesK26.9Duodenal ulcer, unsp as acute or chronic, w/o hemor or perfYes
Frequently asked questions
What is ICD-10 code K26?
K26 is an ICD-10-CM diagnosis code for Duodenal ulcer.
Is K26 a billable code?
No. K26 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is K26 in?
K26 falls under Chapter 11: Diseases of the digestive system.
When did K26 become effective?
K26 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to K26?
K26 belongs to category K26, which includes 9 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.