2026 ICD-10-CM Diagnosis Code K29Gastritis and duodenitis

ICD-10-CM Codes›K00–K95›K20-K31›K29

ICD-10-CM K29
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K29 is a non-billable ICD-10-CM category code for gastritis and duodenitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K29.00, K29.01, K29.20, and K29.21.

Code Identity

ICD-10-CM Code
K29
Billable Status
No — Non-Billable Category
Code Describes
Gastritis and duodenitis
Chapter
K20-K31
Diseases of esophagus, stomach and duodenum

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK29Gastritis and duodenitis
This CodeK29Gastritis and duodenitis

Specific Coding for Gastritis and duodenitisOverview

Non-specific codes like K29 require more characters. Use one of these billable codes instead:

  • K29.0 for Acute gastritis

  • Use K29.00 for Acute gastritis without bleeding

  • Use K29.01 for Acute gastritis with bleeding

  • K29.2 for Alcoholic gastritis

  • Use K29.20 for Alcoholic gastritis without bleeding

  • Use K29.21 for Alcoholic gastritis with bleeding

  • K29.3 for Chronic superficial gastritis

  • Use K29.30 for Chronic superficial gastritis without bleeding

  • Use K29.31 for Chronic superficial gastritis with bleeding

  • K29.4 for Chronic atrophic gastritis

  • Use K29.40 for Chronic atrophic gastritis without bleeding

  • Use K29.41 for Chronic atrophic gastritis with bleeding

  • K29.5 for Unspecified chronic gastritis

  • Use K29.50 for Unspecified chronic gastritis without bleeding

  • Use K29.51 for Unspecified chronic gastritis with bleeding

  • K29.6 for Other gastritis

  • Use K29.60 for Other gastritis without bleeding

  • Use K29.61 for Other gastritis with bleeding

  • K29.7 for Gastritis, unspecified

  • Use K29.70 for Gastritis, unspecified, without bleeding

  • Use K29.71 for Gastritis, unspecified, with bleeding

  • K29.8 for Duodenitis

  • Use K29.80 for Duodenitis without bleeding

  • Use K29.81 for Duodenitis with bleeding

  • K29.9 for Gastroduodenitis, unspecified

  • Use K29.90 for Gastroduodenitis, unspecified, without bleeding

  • Use K29.91 for Gastroduodenitis, unspecified, with bleeding

Tabular List NotesGuidance

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

Type 1 Excludes

  • eosinophilic gastritis or gastroenteritis K52.81
  • Zollinger-Ellison syndrome E16.4

Patient EducationClinical

Stomach Disorders

Your stomach is an organ between your esophagus and small intestine. It is where digestion of protein begins. The stomach has three tasks. It stores swallowed food. It mixes the food with stomach acids. Then it sends the mixture on to the small intestine.

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 K29Overview

Is K29 (Gastritis and duodenitis) a billable code?

No. This is a category header that groups the codes for gastritis and duodenitis, and headers cannot be submitted on claims. Claims for gastritis and duodenitis need a more specific code from this category, such as K29.00, K29.01, and K29.20.