2026 ICD-10-CM Diagnosis Code K29.81Duodenitis with bleeding

ICD-10-CM Codes›K00–K95›K20-K31›K29

ICD-10-CM K29.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K29.81 is a billable ICD-10-CM diagnosis code for duodenitis with bleeding. 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. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 72 closely related codes. Coders also document this condition as hemorrhagic duodenitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastritis and duodenitis and Gastrointestinal hemorrhage.

Code Identity

ICD-10-CM Code
K29.81
Billable Status
Yes — Valid for Submission
Code Describes
Duodenitis with bleeding
Short Description
Duodenitis with bleeding
Same as the full description in the CMS dataset.
Parent Code
K29.8
Duodenitis

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK29Gastritis and duodenitis
This CodeK29.81Duodenitis with bleeding

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hemorrhagic duodenitis
  • Hemorrhagic enteritis of intestine

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR DIG007
Gastritis and duodenitis
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR DIG021
Gastrointestinal hemorrhage
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Duodenitis

    inflammation of the duodenum section of the small intestine (intestine, small). erosive duodenitis may cause bleeding in the upper gi tract and peptic ulcer.

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 K29.81 to ICD-9-CMHistory

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

ICD-9-CM
535.61 Duodenitis w hmrhg
Exact Match The mapping is direct, with no qualifiers.

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 K29.81Overview

What is the ICD-10 code for duodenitis with bleeding?

The ICD-10-CM code for duodenitis with bleeding is K29.81 (sometimes written as K2981). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is K29.81 (Duodenitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report duodenitis with bleeding on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K29.81 group to?

When duodenitis with bleeding 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.

Is K29.81 a CC or MCC?

CMS lists K29.81 as an MCC (major complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 72 closely related codes in its exclusion list.

What is the ICD-9 equivalent of K29.81?

Under the General Equivalence Mappings, duodenitis with bleeding converts to ICD-9-CM 535.61 (duodenitis w hmrhg). The mapping is a direct match.