2026 ICD-10-CM Diagnosis Code K27Peptic ulcer, site unspecified

ICD-10-CM Codes›K00–K95›K20-K31›K27

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

K27 is a non-billable ICD-10-CM category code for peptic ulcer, site unspecified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K27.0, K27.1, K27.2, and K27.3.

Code Identity

ICD-10-CM Code
K27
Billable Status
No — Non-Billable Category
Code Describes
Peptic ulcer, site unspecified
Chapter
K20-K31
Diseases of esophagus, stomach and duodenum

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK27Peptic ulcer, site unspecified
This CodeK27Peptic ulcer, site unspecified

Specific Coding for Peptic ulcer, site unspecifiedOverview

Non-specific codes like K27 require more characters. Use one of these billable codes instead:

  • Use K27.0 for Acute peptic ulcer, site unspecified, with hemorrhage

  • Use K27.1 for Acute peptic ulcer, site unspecified, with perforation

  • Use K27.2 for Acute peptic ulcer, site unspecified, with both hemorrhage and perforation

  • Use K27.3 for Acute peptic ulcer, site unspecified, without hemorrhage or perforation

  • Use K27.4 for Chronic or unspecified peptic ulcer, site unspecified, with hemorrhage

  • Use K27.5 for Chronic or unspecified peptic ulcer, site unspecified, with perforation

  • Use K27.6 for Chronic or unspecified peptic ulcer, site unspecified, with both hemorrhage and perforation

  • Use K27.7 for Chronic peptic ulcer, site unspecified, without hemorrhage or perforation

  • Use K27.9 for Peptic ulcer, site unspecified, unspecified as acute or chronic, without hemorrhage or perforation

Tabular List NotesGuidance

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

Includes

  • gastroduodenal ulcer NOS
  • peptic ulcer NOS

Use Additional Code

  • code to identify:
  • alcohol abuse and dependence F10

Type 1 Excludes

  • peptic ulcer of newborn P78.82

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.

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 K27Overview

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

No. This is a category header that groups the codes for peptic ulcer, site unspecified, and headers cannot be submitted on claims. Claims for peptic ulcer, site unspecified need a more specific code from this category, such as K27.0, K27.1, and K27.2.