2026 ICD-10-CM Diagnosis Code K25.9Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation

ICD-10-CM Codes›K00–K95›K20-K31›K25

ICD-10-CM K25.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K25.9 is a billable ICD-10-CM diagnosis code for gastric 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 384. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastroduodenal ulcer.

Code Identity

ICD-10-CM Code
K25.9
Billable Status
Yes — Valid for Submission
Code Describes
Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation
Short Description
Gastric ulcer, unsp as acute or chronic, w/o hemor or perf
Parent Code
K25
Gastric ulcer

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK25Gastric ulcer
This CodeK25.9Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anastomotic ulcer of stomach caused by drug
  • Anastomotic ulcer of stomach caused by Helicobacter pylori
  • Antral ulcer
  • Cancerous ulcer
  • Combined gastric AND duodenal ulcer
  • Esophagogastric ulcer
  • Gastric erosion
  • Gastric ulcer
  • Gastric ulcer caused by bacterium
  • Gastric ulcer caused by chemical
  • Gastric ulcer caused by cytomegalovirus
  • Gastric ulcer caused by drug
  • Gastric ulcer caused by fungus
  • Gastric ulcer caused by Helicobacter pylori
  • Gastric ulcer caused by Helicobacter pylori and non-steroidal anti-inflammatory agent
  • Gastric ulcer caused by ionizing radiation
  • Gastric ulcer caused by non-steroidal anti-inflammatory drug in therapeutic use
  • Gastric ulcer caused by virus
  • Gastric ulcer due to Crohn disease
  • Gastric ulcer due to Henoch-Schönlein purpura
  • Gastric ulcer due to parasitic infection
  • Gastric ulcer due to sarcoidosis
  • Gastric ulcer due to vasculitis
  • Gastric ulcer due to Zollinger-Ellison syndrome
  • Gastric ulcer induced by platelet aggregation inhibitor
  • Gastric ulcer without hemorrhage AND without perforation
  • Gastric ulcer without hemorrhage AND without perforation but with obstruction
  • Gastric ulcer without hemorrhage, without perforation AND without obstruction
  • Gastroduodenal disorder
  • Gastroesophageal erosion
  • Helicobacter-associated pyloric ulcer
  • Infection causing ulcer of stomach
  • Multiple gastric erosions
  • Multiple gastric ulcers
  • Peptic ulcer without hemorrhage AND without perforation but with obstruction
  • Prepyloric ulcer
  • Pyloric ulcer
  • Ulcer of stomach due to eosinophilic gastritis
  • Ulcer of stomach due to lymphocytic gastritis
  • Ulcerative cytomegalovirus lesion

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
      • stomach (eroded) (peptic) (round)

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 K25.9 to ICD-9-CMHistory

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

ICD-9-CM
531.90 Stomach 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 K25.9Overview

Is K25.9 (Gastric ulcer) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report gastric 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 K25.9 group to?

When gastric 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, 383, 384, 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 K25.9?

Under the General Equivalence Mappings, gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation converts to ICD-9-CM 531.90 (stomach 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.