ICD-10-CM
ICD-10 code for Duodenal ulcer: K26.9
The closest CDC title for "Duodenal ulcer" is K26.9, Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation. K26.9 is a billable code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
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Codes under K26, then other CDC titles that name duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation
A header groups codes and is not billed. A billable code is one you can report.
- K26Duodenal ulcerHeader
- K26.0Acute duodenal ulcer with hemorrhageBillable
- K26.1Acute duodenal ulcer with perforationBillable
- K26.2Acute duodenal ulcer with both hemorrhage and perforationBillable
- K26.3Acute duodenal ulcer without hemorrhage or perforationBillable
- K26.4Chronic or unspecified duodenal ulcer with hemorrhageBillable
- K26.5Chronic or unspecified duodenal ulcer with perforationBillable
- K26.6Chronic or unspecified duodenal ulcer with both hemorrhage and perforationBillable
- K26.7Chronic duodenal ulcer without hemorrhage or perforationBillable
- K26.9Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforationBillable
Use additional code
The CDC tabular list says to add the code named here after this one when it applies.
From K26. A note on a category applies to every code under it.
Use additional code to identify:
Excludes1
Excludes1 means these codes are not reported together.
From K26. A note on a category applies to every code under it.
Related conditions
Related pages
- K26.9 code detailsNotes, nearby codes, CMS-HCC group
- Category K26Every code under it
- Chapter 11Diseases of the digestive system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Duodenal ulcer?
The closest CDC title for "Duodenal ulcer" is K26.9, Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation. K26.9 is a billable code.
Is K26.9 billable?
Yes. K26.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to K26.9?
The CDC tabular list gives 1 Excludes1 note (not coded together), 2 "use additional code" notes for K26.9 and the categories above it. They are listed on this page.
What chapter is K26.9 in?
Chapter 11. Diseases of the digestive system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.