2026 ICD-10-CM Diagnosis Code K26.6Chronic or unspecified duodenal ulcer with both hemorrhage and perforation

ICD-10-CM Codes›K00–K95›K20-K31›K26

ICD-10-CM K26.6
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K26.6 is a billable ICD-10-CM diagnosis code for chronic or unspecified duodenal ulcer with both hemorrhage and perforation. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 377 through 379. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastrointestinal hemorrhage.

Code Identity

ICD-10-CM Code
K26.6
Billable Status
Yes — Valid for Submission
Code Describes
Chronic or unspecified duodenal ulcer with both hemorrhage and perforation
Short Description
Chronic or unsp duodenal ulcer w both hemorrhage and perf
Parent Code
K26
Duodenal ulcer

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK26Duodenal ulcer
This CodeK26.6Chronic or unspecified duodenal ulcer with both hemorrhage and perforation

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic duodenal ulcer with hemorrhage
  • Chronic duodenal ulcer with hemorrhage AND obstruction
  • Chronic duodenal ulcer with hemorrhage AND perforation
  • Chronic duodenal ulcer with hemorrhage AND with perforation but without obstruction
  • Chronic duodenal ulcer with hemorrhage, with perforation AND with obstruction
  • Chronic duodenal ulcer with obstruction
  • Chronic duodenal ulcer with perforation
  • Chronic duodenal ulcer with perforation AND obstruction
  • Chronic peptic ulcer with hemorrhage AND obstruction
  • Chronic peptic ulcer with hemorrhage AND perforation
  • Chronic peptic ulcer with hemorrhage, with perforation AND with obstruction
  • Chronic peptic ulcer with perforation AND obstruction
  • Duodenal ulcer with hemorrhage AND obstruction
  • Duodenal ulcer with hemorrhage AND perforation
  • Duodenal ulcer with hemorrhage AND with perforation but without obstruction
  • Duodenal ulcer with hemorrhage but without obstruction
  • Duodenal ulcer with hemorrhage, with perforation AND with obstruction
  • Duodenal ulcer with perforation AND obstruction
  • Duodenal ulcer with perforation but without obstruction

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • duodenum, duodenal (eroded) (peptic)
        • with
          • hemorrhage
            • and perforation
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • duodenum, duodenal (eroded) (peptic)
        • chronic (erosive)
          • with
            • hemorrhage
              • and perforation

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DIG021
Gastrointestinal hemorrhage
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Duodenal Ulcer

    a peptic ulcer located in the duodenum.

Patient EducationClinical

Gastrointestinal Bleeding

Your digestive or gastrointestinal (GI) tract includes the esophagus, stomach, small intestine, large intestine or colon, rectum, and anus. Bleeding can come from any of these areas. The amount of bleeding can be so small that only a lab test can find it.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert K26.6 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
532.60 Chr duoden ulc hem/perf
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K26.6Overview

Is K26.6 (Duodenal ulcer) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report chronic or unspecified duodenal ulcer with both hemorrhage and perforation on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K26.6 group to?

When chronic or unspecified duodenal ulcer with both hemorrhage and perforation is the principal diagnosis on an inpatient stay, it groups to MS-DRG 377, 378, 379, with relative weights from 0.6304 to 1.8280 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K26.6?

Under the General Equivalence Mappings, chronic or unspecified duodenal ulcer with both hemorrhage and perforation converts to ICD-9-CM 532.60 (chr duoden ulc hem/perf). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.