2026 ICD-10-CM Diagnosis Code K27.0Acute peptic ulcer, site unspecified, with hemorrhage

ICD-10-CM Codes›K00–K95›K20-K31›K27

ICD-10-CM K27.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K27.0 is a billable ICD-10-CM diagnosis code for acute peptic ulcer, site unspecified, 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. Coders also document this condition as acute peptic ulcer with hemorrhage. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastrointestinal hemorrhage.

Code Identity

ICD-10-CM Code
K27.0
Billable Status
Yes — Valid for Submission
Code Describes
Acute peptic ulcer, site unspecified, with hemorrhage
Short Description
Acute peptic ulcer, site unspecified, with hemorrhage
Same as the full description in the CMS dataset.
Parent Code
K27
Peptic ulcer, site unspecified

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK27Peptic ulcer, site unspecified
This CodeK27.0Acute peptic ulcer, site unspecified, with hemorrhage

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute peptic ulcer with hemorrhage
  • Acute peptic ulcer with hemorrhage AND obstruction
  • Acute peptic 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.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • peptic (site unspecified)
        • acute
          • with
            • hemorrhage

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 K27.0 to ICD-9-CMHistory

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

ICD-9-CM
533.00 Ac peptic ulcer w hemorr
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 K27.0Overview

Is K27.0 (Peptic ulcer, site unspecified) a billable code?

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

What MS-DRG does K27.0 group to?

When acute peptic ulcer, site unspecified, 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.

What is the ICD-9 equivalent of K27.0?

Under the General Equivalence Mappings, acute peptic ulcer, site unspecified, with hemorrhage converts to ICD-9-CM 533.00 (ac peptic ulcer w hemorr). 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.