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ICD-10-CM 2027 diagnosis code

K29.0Acute gastritis

Not billable — use a more specific code

K29.0 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K29.0

K29.0 is the ICD-10-CM diagnosis code for acute gastritis. It belongs to category K29 (gastritis and duodenitis), block K20-K31 (diseases of esophagus, stomach and duodenum) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within K29 (gastritis and duodenitis), K29.0 is specifically for acute gastritis. Related codes cover alcoholic gastritis (K29.2), chronic superficial gastritis (K29.3), chronic atrophic gastritis (K29.4), unspecified chronic gastritis (K29.5), other gastritis (K29.6), gastritis, unspecified (K29.7), duodenitis (K29.8) and gastroduodenitis, unspecified (K29.9).

To report this condition, pick the subcode that matches the documentation: K29.00 (without bleeding) and K29.01 (with bleeding).

Don't report K29.0 together with the conditions in its Excludes1 note: erosion (acute) of stomach (K25.-).

Use an additional code to identify: alcohol abuse and dependence (F10.-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under K29.0

Coding notes

Excludes1Not coded here — never report together with this code
  • erosion (acute) of stomach (K25.-)
Use additional codeAdd a secondary code to fully describe the condition
  • code to identify:
  • alcohol abuse and dependence (F10.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to K29.0.

› From K29 Gastritis and duodenitis
Excludes1
  • eosinophilic gastritis or gastroenteritis (K52.81)
  • Zollinger-Ellison syndrome (E16.4)

Broader instructions also apply from K20-K31 Diseases of esophagus, stomach and duodenum and Chapter 11: Diseases of the digestive system.

Codes whose notes reference K29.0

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about K29.0

Is K29.0 billable?

No. K29.0 is a header code. Report one of its more specific subcodes instead.