K26 Duodenal ulcer

⚠ Non-Billable ICD-10-CM 2026
Open K26 in Web App →

The ICD-10-CM code for Duodenal ulcer is K26 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
K20-K31: Diseases of esophagus, stomach and duodenum (K20-K31)
Category K26
10 codes (9 billable)
FY2026 Status
Stable since FY2024
Includes
  • erosion (acute) of duodenum
  • duodenum ulcer (peptic)
  • postpyloric ulcer (peptic)
Excludes1
Not coded here. These conditions should NOT be coded together with K26.
  • peptic ulcer NOS (K27.-)
Use Additional Code
  • code to identify:
  • alcohol abuse and dependence (F10.-)

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.11

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

K26.0 Acute duodenal ulcer with hemorrhage K26.1 Acute duodenal ulcer with perforation K26.2 Acute duodenal ulcer with both hemorrhage and perforation K26.3 Acute duodenal ulcer without hemorrhage or perforation K26.4 Chronic or unspecified duodenal ulcer with hemorrhage K26.5 Chronic or unspecified duodenal ulcer with perforation K26.6 Chronic or unspecified duodenal ulcer with both hemorrhage and perforation K26.7 Chronic duodenal ulcer without hemorrhage or perforation K26.9 Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation

Related Codes in K26

K26.0 Acute duodenal ulcer with hemorrhage K26.1 Acute duodenal ulcer with perforation K26.2 Acute duodenal ulcer with both hemorrhage and perforation K26.3 Acute duodenal ulcer without hemorrhage or perforation K26.4 Chronic or unspecified duodenal ulcer with hemorrhage K26.5 Chronic or unspecified duodenal ulcer with perforation K26.6 Chronic or unspecified duodenal ulcer with both hemorrhage and perforation K26.7 Chronic duodenal ulcer without hemorrhage or perforation K26.9 Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation
Search all 70,000+ ICD-10-CM codes →
Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

Get HCC Mappings, Clinical Summaries, and More

Access premium features including HCC risk adjustment, FDA drug indications, AI coding assistant, and comprehensive clinical context.

Start Free Trial