2027 ICD-10-CM Diagnosis Code K29Gastritis and duodenitis

ICD-10-CM Codes›K00–K95›K20-K31›K29

ICD-10-CM K29
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Gastritis and duodenitis
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K29: its own notes plus those printed at block K20-K31 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

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

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block K20-K31 Diseases of esophagus, stomach and duodenum applies to 106 codes
From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name K29, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming K29: they are not reported together with it, unless the two conditions are unrelated.

  • K92.2 Gastrointestinal hemorrhage, unspecified
    gastritis and duodenitis with hemorrhage (K29.-)

Code First 1

These codes say to code first a condition named in the note, and K29 is one of the conditions named.

  • Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
    aspirin gastritis (K29.-)

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K29Overview

What is the ICD-10 code for gastritis and duodenitis?

K29 is the ICD-10-CM category for gastritis and duodenitis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can K29 be reported with K52.81?

Not as a rule. The Excludes1 note on K29 lists "eosinophilic gastritis or gastroenteritis (K52.81)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).