2026 ICD-10-CM Diagnosis Code K28Gastrojejunal ulcer

ICD-10-CM Codes›K00–K95›K20-K31›K28

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

K28 is a non-billable ICD-10-CM category code for gastrojejunal ulcer, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K28.0, K28.1, K28.2, and K28.3.

Code Identity

ICD-10-CM Code
K28
Billable Status
No — Non-Billable Category
Code Describes
Gastrojejunal ulcer
Chapter
K20-K31
Diseases of esophagus, stomach and duodenum

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK28Gastrojejunal ulcer
This CodeK28Gastrojejunal ulcer

Specific Coding for Gastrojejunal ulcerOverview

Non-specific codes like K28 require more characters. Use one of these billable codes instead:

  • Use K28.0 for Acute gastrojejunal ulcer with hemorrhage

  • Use K28.1 for Acute gastrojejunal ulcer with perforation

  • Use K28.2 for Acute gastrojejunal ulcer with both hemorrhage and perforation

  • Use K28.3 for Acute gastrojejunal ulcer without hemorrhage or perforation

  • Use K28.4 for Chronic or unspecified gastrojejunal ulcer with hemorrhage

  • Use K28.5 for Chronic or unspecified gastrojejunal ulcer with perforation

  • Use K28.6 for Chronic or unspecified gastrojejunal ulcer with both hemorrhage and perforation

  • Use K28.7 for Chronic gastrojejunal ulcer without hemorrhage or perforation

  • Use K28.9 for Gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • anastomotic ulcer (peptic) or erosion
  • gastrocolic ulcer (peptic) or erosion
  • gastrointestinal ulcer (peptic) or erosion
  • gastrojejunal ulcer (peptic) or erosion
  • jejunal ulcer (peptic) or erosion
  • marginal ulcer (peptic) or erosion
  • stomal ulcer (peptic) or erosion

Use Additional Code

  • code to identify:
  • alcohol abuse and dependence F10

Type 1 Excludes

  • primary ulcer of small intestine K63.3

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

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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 K28Overview

Is K28 (Gastrojejunal ulcer) a billable code?

No. This is a category header that groups the codes for gastrojejunal ulcer, and headers cannot be submitted on claims. Claims for gastrojejunal ulcer need a more specific code from this category, such as K28.0, K28.1, and K28.2.