ICD-10 Code for Gastroenteritis

The default ICD-10-CM 2027 code for gastroenteritis (acute) (chronic) (noninfectious) is K52.9 – Noninfective gastroenteritis and colitis, unspecified. More specific codes depend on the details documented, as listed in the official index (15 codes, 15 billable).

Main code: K52.9 – Noninfective gastroenteritis and colitis, unspecified
Billable: Yes
See also: Enteritis

Index entries for Gastroenteritis

allergic – K52.29
- with
  - eosinophilic gastritis or gastroenteritis – K52.81
  - food protein-induced enterocolitis syndrome – K52.21
  - food protein-induced enteropathy – K52.22
dietetic – K52.29 – see also Gastroenteritis, allergic
drug-induced – K52.1
due to
- Cryptosporidium – A07.2
- drugs – K52.1
- food poisoning – see Intoxication, foodborne
- radiation – K52.0
eosinophilic – K52.81
epidemic (infectious) – A09
food hypersensitivity – K52.29 – see also Gastroenteritis, allergic
infectious – see Enteritis, infectious
influenzal – see Influenza, with gastroenteritis
noninfectious – K52.9
- specified NEC – K52.89
rotaviral – A08.0
Salmonella – A02.0
toxic – K52.1
viral NEC – A08.4
- acute infectious – A08.39
  - type Norwalk – A08.11
- infantile (acute) – A08.39
- Norwalk agent – A08.11
- rotaviral – A08.0
- severe of infants – A08.39
- specified type NEC – A08.39

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.