ICD-10-CM Alphabetic Index · FY 2026 31 Entries

Gastroenteritis in the ICD-10-CM Index ICD-10-CM

The main term Gastroenteritis (acute) (chronic) (noninfectious) carries 31 index entries pointing to 15 ICD-10-CM codes. The default entry is K52.9, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.

✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026

Index Entries

Codes Referenced

K52.9

Default Code

Letter

31 of 31 shown

ICD-10-CM

Index Entries Under Gastroenteritis 31 entries · 15 codes

Gastroenteritis (acute) (chronic) (noninfectious) K52.9

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

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Related Index Terms

Intoxication All index terms starting with G Index to Diseases and Injuries ICD-10-CM Code Lookup

Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.