ICD-10 Code for Gastritis

The default ICD-10-CM 2027 code for gastritis (simple) is K29.70 – Gastritis, unspecified, without bleeding. More specific codes depend on the details documented, as listed in the official index (20 codes, 20 billable).

Main code: K29.70 – Gastritis, unspecified, without bleeding
Billable: Yes

Index entries for Gastritis

with bleeding – K29.71
acute (erosive) – K29.00
- with bleeding – K29.01
alcoholic – K29.20
- with bleeding – K29.21
allergic – K29.60
- with bleeding – K29.61
atrophic (chronic) – K29.40
- with bleeding – K29.41
chronic (antral) (fundal) – K29.50
- with bleeding – K29.51
- atrophic – K29.40
  - with bleeding – K29.41
- superficial – K29.30
  - with bleeding – K29.31
dietary counseling and surveillance – Z71.3
due to diet deficiency – E63.9
eosinophilic – K52.81
giant hypertrophic – K29.60
- with bleeding – K29.61
granulomatous – K29.60
- with bleeding – K29.61
hypertrophic (mucosa) – K29.60
- with bleeding – K29.61
nervous – F54
spastic – K29.60
- with bleeding – K29.61
specified NEC – K29.60
- with bleeding – K29.61
superficial chronic – K29.30
- with bleeding – K29.31
tuberculous – A18.83
viral NEC – A08.4

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.