2026 ICD-10-CM Diagnosis Code K28.0Acute gastrojejunal ulcer with hemorrhage

ICD-10-CM Codes›K00–K95›K20-K31›K28

ICD-10-CM K28.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K28.0 is a billable ICD-10-CM diagnosis code for acute gastrojejunal ulcer with hemorrhage. 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 75 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastrointestinal hemorrhage.

Code Identity

ICD-10-CM Code
K28.0
Billable Status
Yes — Valid for Submission
Code Describes
Acute gastrojejunal ulcer with hemorrhage
Short Description
Acute gastrojejunal ulcer with hemorrhage
Same as the full description in the CMS dataset.
Parent Code
K28
Gastrojejunal ulcer

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK28Gastrojejunal ulcer
This CodeK28.0Acute gastrojejunal ulcer with hemorrhage

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute gastric ulcer with obstruction
  • Acute gastrojejunal ulcer with hemorrhage
  • Acute gastrojejunal ulcer with hemorrhage and obstruction
  • Acute gastrojejunal ulcer with hemorrhage but without obstruction
  • Acute gastrojejunal ulcer with obstruction
  • Acute peptic ulcer with hemorrhage AND obstruction
  • Acute peptic ulcer with hemorrhage but without obstruction
  • Gastrojejunal ulcer with hemorrhage AND obstruction
  • Gastrojejunal ulcer with hemorrhage but without obstruction
  • Peptic ulcer with hemorrhage but without obstruction

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

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 K28.0 to ICD-9-CMHistory

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

ICD-9-CM
534.00 Ac marginal ulcer w hem
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 K28.0Overview

What is the ICD-10 code for acute gastrojejunal ulcer with hemorrhage?

The ICD-10-CM code for acute gastrojejunal ulcer with hemorrhage is K28.0 (sometimes written as K280). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is K28.0 (Gastrojejunal ulcer) a billable code?

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

What MS-DRG does K28.0 group to?

When acute gastrojejunal ulcer with hemorrhage 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 K28.0 a CC or MCC?

CMS lists K28.0 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 75 closely related codes in its exclusion list.

What is the ICD-9 equivalent of K28.0?

Under the General Equivalence Mappings, acute gastrojejunal ulcer with hemorrhage converts to ICD-9-CM 534.00 (ac marginal ulcer w hem). The mapping is approximate, so confirm the match fits the documentation.