2026 ICD-10-CM Diagnosis Code K29.01Acute gastritis with bleeding

ICD-10-CM Codes›K00–K95›K20-K31›K29

ICD-10-CM K29.01
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K29.01 is a billable ICD-10-CM diagnosis code for acute gastritis 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. Coders also document this condition as acute hemorrhagic gastritis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastritis and duodenitis and Gastrointestinal hemorrhage.

Code Identity

ICD-10-CM Code
K29.01
Billable Status
Yes — Valid for Submission
Code Describes
Acute gastritis with bleeding
Short Description
Acute gastritis with bleeding
Same as the full description in the CMS dataset.
Parent Code
K29.0
Acute gastritis

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK29Gastritis and duodenitis
This CodeK29.01Acute gastritis with bleeding

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute hemorrhagic gastritis

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.

    • Gastritis(simple)
      • acute (erosive)
        • with bleeding

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

  • Acute Gastritis

    acute inflammation of the stomach.

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 K29.01 to ICD-9-CMHistory

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

ICD-9-CM
535.01 Acute gastritis 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 K29.01Overview

Is K29.01 (Acute gastritis) a billable code?

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

What MS-DRG does K29.01 group to?

When acute gastritis 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.

What is the ICD-9 equivalent of K29.01?

Under the General Equivalence Mappings, acute gastritis with bleeding converts to ICD-9-CM 535.01 (acute gastritis w hmrhg). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.