ICD-10-CM Alphabetic Index · FY 2026 182 Entries

Enteritis in the ICD-10-CM Index ICD-10-CM

The main term Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) carries 182 index entries pointing to 76 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

182

Index Entries

Codes Referenced

K52.9

Default Code

Letter

182 of 182 shown

ICD-10-CM

Index Entries Under Enteritis 182 entries · 76 codes

Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) K52.9

adenovirus A08.2

aertrycke infection A02.0

allergic K52.29

with

eosinophilic gastritis or gastroenteritis K52.81

food protein-induced enterocolitis syndrome K52.21

food protein-induced enteropathy K52.22

FPIES K52.21

amebic (acute) A06.0

with abscess see Abscess, amebic

chronic A06.1

with abscess see Abscess, amebic

nondysenteric A06.2

astrovirus A08.32

bacillary NOS A03.9

bacterial A04.9

specified NEC A04.8

calicivirus A08.31

candidal B37.82

Chilomastix A07.8

choleriformis A00.1

chronic (noninfectious) K52.9

ulcerative see Colitis, ulcerative

cicatrizing (chronic) see Enteritis, regional, small intestine

Clostridioides difficile

not specified as recurrent A04.72

recurrent A04.71

Clostridium

botulinum (food poisoning) A05.1

difficile

not specified as recurrent A04.72

recurrent A04.71

coccidial A07.3

coxsackie virus A08.39

dietetic K52.29 see also Enteritis, allergic

drug-induced K52.1

due to

astrovirus A08.32

calicivirus A08.31

coxsackie virus A08.39

drugs K52.1

echovirus A08.39

enterovirus NEC A08.39

food hypersensitivity K52.29 see also Enteritis, allergic

infectious organism (bacterial) (viral) see Enteritis, infectious

torovirus A08.39

Yersinia enterocolitica A04.6

echovirus A08.39

eltor A00.1

enterovirus NEC A08.39

eosinophilic K52.81

epidemic (infectious) A09

fulminant K55.019 see also Ischemia, intestine, acute

gangrenous see Enteritis, infectious

giardial A07.1

infectious NOS A09

due to

adenovirus A08.2

Aerobacter aerogenes A04.8

Arizona (bacillus) A02.0

bacteria NOS A04.9

specified NEC A04.8

Campylobacter A04.5

Clostridioides difficile

not specified as recurrent A04.72

recurrent A04.71

Clostridium difficile

not specified as recurrent A04.72

recurrent A04.71

Clostridium perfringens A04.8

Enterobacter aerogenes A04.8

enterovirus A08.39

Escherichia coli A04.4

enteroaggregative A04.4

enterohemorrhagic A04.3

enteroinvasive A04.2

enteropathogenic A04.0

enterotoxigenic A04.1

specified NEC A04.4

specified

bacteria NEC A04.8

virus NEC A08.39

Staphylococcus A04.8

virus NEC A08.4

specified type NEC A08.39

Yersinia enterocolitica A04.6

specified organism NEC A08.8

influenzal see Influenza, with, digestive manifestations

ischemic K55.9

acute K55.019 see also Ischemia, intestine, acute

chronic K55.1

microsporidial A07.8

mucomembranous, myxomembranous see Syndrome, irritable bowel

mucous see Syndrome, irritable bowel

necroticans A05.2

necrotizing of newborn see Enterocolitis, necrotizing, in newborn

neurogenic see Syndrome, irritable bowel

newborn necrotizing see Enterocolitis, necrotizing, in newborn

noninfectious K52.9

norovirus A08.11

parasitic NEC B82.9

paratyphoid (fever) see Fever, paratyphoid

protozoal A07.9

specified NEC A07.8

radiation K52.0

regional (of) K50.90

with

complication K50.919

abscess K50.914

fistula K50.913

intestinal obstruction K50.912

rectal bleeding K50.911

specified complication NEC K50.918

colon see Enteritis, regional, large intestine

duodenum see Enteritis, regional, small intestine

ileum see Enteritis, regional, small intestine

jejunum see Enteritis, regional, small intestine

large bowel see Enteritis, regional, large intestine

large intestine (colon) (rectum) K50.10

with

complication K50.119

abscess K50.114

fistula K50.113

intestinal obstruction K50.112

rectal bleeding K50.111

small intestine (duodenum) (ileum) (jejunum) involvement K50.80

with

complication K50.819

abscess K50.814

fistula K50.813

intestinal obstruction K50.812

rectal bleeding K50.811

specified complication NEC K50.818

specified complication NEC K50.118

rectum see Enteritis, regional, large intestine

small intestine (duodenum) (ileum) (jejunum) K50.00

with

complication K50.019

abscess K50.014

fistula K50.013

intestinal obstruction K50.012

large intestine (colon) (rectum) involvement K50.80

with

complication K50.819

abscess K50.814

fistula K50.813

intestinal obstruction K50.812

rectal bleeding K50.811

specified complication NEC K50.818

rectal bleeding K50.011

specified complication NEC K50.018

rotaviral A08.0

Salmonella, salmonellosis (arizonae) (cholerae-suis) (enteritidis) (typhimurium) A02.0

segmental see Enteritis, regional

septic A09

Shigella see Infection, Shigella

small round structured NEC A08.19

spasmodic, spastic see Syndrome, irritable bowel

staphylococcal A04.8

due to food A05.0

torovirus A08.39

toxic NEC K52.1

due to

Clostridioides difficile

not specified as recurrent A04.72

recurrent A04.71

Clostridium difficile

not specified as recurrent A04.72

recurrent A04.71

trichomonal A07.8

tuberculous A18.32

typhosa A01.00

ulcerative (chronic) see Colitis, ulcerative

viral A08.4

adenovirus A08.2

enterovirus A08.39

Rotavirus A08.0

small round structured NEC A08.19

specified NEC A08.39

virus specified NEC A08.39

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Related Index Terms

Enterocolitis Syndrome All index terms starting with E 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.