2026 ICD-10-CM Diagnosis Code K28.9Gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation

ICD-10-CM Codes›K00–K95›K20-K31›K28

ICD-10-CM K28.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K28.9 is a billable ICD-10-CM diagnosis code for gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 380 through 382. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastroduodenal ulcer.

Code Identity

ICD-10-CM Code
K28.9
Billable Status
Yes — Valid for Submission
Code Describes
Gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation
Short Description
Gastrojejunal ulcer, unsp as acute or chr, w/o hemor or perf
Parent Code
K28
Gastrojejunal ulcer

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK28Gastrojejunal ulcer
This CodeK28.9Gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anastomotic ulcer due to Zollinger-Ellison syndrome
  • Cancerous ulcer
  • Erosion of gastrointestinal anastomosis
  • Gastric ulcer without hemorrhage AND without perforation but with obstruction
  • Gastrocolic ulcer
  • Gastrointestinal anastomotic ulcer due to Crohn disease
  • Gastrointestinal ulcer
  • Gastrointestinal ulceration due to sepsis
  • Gastrojejunal ulcer
  • Gastrojejunal ulcer without hemorrhage AND without perforation
  • Gastrojejunal ulcer without hemorrhage AND without perforation but with obstruction
  • Gastrojejunal ulcer without hemorrhage, without perforation AND without obstruction
  • Jejunal ulcer
  • Parastomal ulceration
  • Peptic ulcer without hemorrhage AND without perforation but with obstruction
  • Peristomal skin complication

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
      • gastrojejunal (peptic)

Clinical ClassificationClinical

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

CCSR DIG005
Gastroduodenal ulcer
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Peptic Ulcer

A peptic ulcer is a sore in the lining of your stomach or your duodenum, the first part of your small intestine. A burning stomach pain is the most common symptom. The pain:

Read the full article at MedlinePlus

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

Convert K28.9 to ICD-9-CMHistory

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

ICD-9-CM
534.90 Gastrojejunal ulcer NOS
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 K28.9Overview

Is K28.9 (Gastrojejunal ulcer) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K28.9 group to?

When gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation is the principal diagnosis on an inpatient stay, it groups to MS-DRG 380, 381, 382, with relative weights from 0.8006 to 1.9622 depending on complications. Higher weights mean higher Medicare reimbursement.

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

Under the General Equivalence Mappings, gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation converts to ICD-9-CM 534.90 (gastrojejunal ulcer NOS). The mapping is approximate, so confirm the match fits the documentation.

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.