ICD-10-CM 2027
ICD-10 code for enteritis
From the official ICD-10-CM alphabetic index entry “Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective)”. Page updated September 29, 2026.
About coding enteritis
The ICD-10-CM code for enteritis is K52.9 (Noninfective gastroenteritis and colitis, unspecified). The official index lists 141 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K52.9.
Within K52, choose K52.9 (Noninfective gastroenteritis and colitis, unspecified) only when documentation doesn't support a more specific option: gastroenteritis and colitis due to radiation (K52.0), toxic gastroenteritis and colitis (K52.1), allergic and dietetic gastroenteritis and colitis (K52.2), indeterminate colitis (K52.3) and other specified noninfective gastroenteritis and colitis (K52.8).
Don't report K52.9 together with the conditions in its Excludes1 note: diarrhea NOS (R19.7), functional diarrhea (K59.1), infectious gastroenteritis and colitis NOS (A09), neonatal diarrhea (noninfective) (P78.3) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific enteritis codes (official index)
- adenovirus A08.2 — Adenoviral enteritis
- aertrycke infection A02.0 — Salmonella enteritis
- allergic K52.29 — Other allergic and dietetic gastroenteritis and colitis
- with
- eosinophilic gastritis or gastroenteritis K52.81 — Eosinophilic gastritis or gastroenteritis
- food protein-induced enterocolitis syndrome K52.21 — Food protein-induced enterocolitis syndrome
- food protein-induced enteropathy K52.22 — Food protein-induced enteropathy
- FPIES K52.21 — Food protein-induced enterocolitis syndrome
- amebic (acute) A06.0 — Acute amebic dysentery
- with abscess
- chronic A06.1 — Chronic intestinal amebiasis
- with abscess
- nondysenteric A06.2 — Amebic nondysenteric colitis
- nondysenteric A06.2 — Amebic nondysenteric colitis
- astrovirus A08.32 — Astrovirus enteritis
- bacillary NOS A03.9 — Shigellosis, unspecified
- bacterial A04.9 — Bacterial intestinal infection, unspecified
- specified NEC A04.8 — Other specified bacterial intestinal infections
- calicivirus A08.31 — Calicivirus enteritis
- candidal B37.82 — Candidal enteritis
- Chilomastix A07.8 — Other specified protozoal intestinal diseases
- choleriformis A00.1 — Cholera due to Vibrio cholerae 01, biovar eltor
- chronic (noninfectious) K52.9 — Noninfective gastroenteritis and colitis, unspecified
- ulcerative
- cicatrizing (chronic)
- Clostridioides difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- Clostridium
- botulinum (food poisoning) A05.1 — Botulism food poisoning
- difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- coccidial A07.3 — Isosporiasis
- coxsackie virus A08.39 — Other viral enteritis
- dietetic K52.29 — Other allergic and dietetic gastroenteritis and colitis
- drug-induced K52.1 — Toxic gastroenteritis and colitis
- due to
- astrovirus A08.32 — Astrovirus enteritis
- calicivirus A08.31 — Calicivirus enteritis
- coxsackie virus A08.39 — Other viral enteritis
- drugs K52.1 — Toxic gastroenteritis and colitis
- echovirus A08.39 — Other viral enteritis
- enterovirus NEC A08.39 — Other viral enteritis
- food hypersensitivity K52.29 — Other allergic and dietetic gastroenteritis and colitis
- infectious organism (bacterial) (viral)
- torovirus A08.39 — Other viral enteritis
- Yersinia enterocolitica A04.6 — Enteritis due to Yersinia enterocolitica
- echovirus A08.39 — Other viral enteritis
- eltor A00.1 — Cholera due to Vibrio cholerae 01, biovar eltor
- enterovirus NEC A08.39 — Other viral enteritis
- eosinophilic K52.81 — Eosinophilic gastritis or gastroenteritis
- epidemic (infectious) A09 — Infectious gastroenteritis and colitis, unspecified
- fulminant K55.019 — Acute (reversible) ischemia of small intestine, extent unspecified
- gangrenous
- giardial A07.1 — Giardiasis [lambliasis]
- infectious NOS A09 — Infectious gastroenteritis and colitis, unspecified
- due to
- adenovirus A08.2 — Adenoviral enteritis
- Aerobacter aerogenes A04.8 — Other specified bacterial intestinal infections
- Arizona (bacillus) A02.0 — Salmonella enteritis
- bacteria NOS A04.9 — Bacterial intestinal infection, unspecified
- specified NEC A04.8 — Other specified bacterial intestinal infections
- Campylobacter A04.5 — Campylobacter enteritis
- Clostridioides difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- Clostridium difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- Clostridium perfringens A04.8 — Other specified bacterial intestinal infections
- Enterobacter aerogenes A04.8 — Other specified bacterial intestinal infections
- enterovirus A08.39 — Other viral enteritis
- Escherichia coli A04.4 — Other intestinal Escherichia coli infections
- enteroaggregative A04.4 — Other intestinal Escherichia coli infections
- enterohemorrhagic A04.3 — Enterohemorrhagic Escherichia coli infection
- enteroinvasive A04.2 — Enteroinvasive Escherichia coli infection
- enteropathogenic A04.0 — Enteropathogenic Escherichia coli infection
- enterotoxigenic A04.1 — Enterotoxigenic Escherichia coli infection
- specified NEC A04.4 — Other intestinal Escherichia coli infections
- specified
- bacteria NEC A04.8 — Other specified bacterial intestinal infections
- virus NEC A08.39 — Other viral enteritis
- Staphylococcus A04.8 — Other specified bacterial intestinal infections
- virus NEC A08.4 — Viral intestinal infection, unspecified
- specified type NEC A08.39 — Other viral enteritis
- Yersinia enterocolitica A04.6 — Enteritis due to Yersinia enterocolitica
- specified organism NEC A08.8 — Other specified intestinal infections
- influenzal
- ischemic K55.9 — Vascular disorder of intestine, unspecified
- acute K55.019 — Acute (reversible) ischemia of small intestine, extent unspecified
- chronic K55.1 — Chronic vascular disorders of intestine
- microsporidial A07.8 — Other specified protozoal intestinal diseases
- mucomembranous, myxomembranous
- mucous
- necroticans A05.2 — Foodborne Clostridium perfringens [Clostridium welchii] intoxication
- necrotizing of newborn
- neurogenic
- newborn necrotizing
- noninfectious K52.9 — Noninfective gastroenteritis and colitis, unspecified
- norovirus A08.11 — Acute gastroenteropathy due to Norwalk agent
- parasitic NEC B82.9 — Intestinal parasitism, unspecified
- paratyphoid (fever)
- protozoal A07.9 — Protozoal intestinal disease, unspecified
- specified NEC A07.8 — Other specified protozoal intestinal diseases
- radiation K52.0 — Gastroenteritis and colitis due to radiation
- regional (of) K50.90 — Crohn's disease, unspecified, without complications
- with
- complication K50.919 — Crohn's disease, unspecified, with unspecified complications
- abscess K50.914 — Crohn's disease, unspecified, with abscess
- fistula K50.913 — Crohn's disease, unspecified, with fistula
- intestinal obstruction K50.912 — Crohn's disease, unspecified, with intestinal obstruction
- rectal bleeding K50.911 — Crohn's disease, unspecified, with rectal bleeding
- specified complication NEC K50.918 — Crohn's disease, unspecified, with other complication
- colon
- duodenum
- ileum
- jejunum
- large bowel
- large intestine (colon) (rectum) K50.10 — Crohn's disease of large intestine without complications
- with
- complication K50.119 — Crohn's disease of large intestine with unspecified complications
- abscess K50.114 — Crohn's disease of large intestine with abscess
- fistula K50.113 — Crohn's disease of large intestine with fistula
- intestinal obstruction K50.112 — Crohn's disease of large intestine with intestinal obstruction
- rectal bleeding K50.111 — Crohn's disease of large intestine with rectal bleeding
- small intestine (duodenum) (ileum) (jejunum) involvement K50.80 — Crohn's disease of both small and large intestine without complications
- with
- complication K50.819 — Crohn's disease of both small and large intestine with unspecified complications
- abscess K50.814 — Crohn's disease of both small and large intestine with abscess
- fistula K50.813 — Crohn's disease of both small and large intestine with fistula
- intestinal obstruction K50.812 — Crohn's disease of both small and large intestine with intestinal obstruction
- rectal bleeding K50.811 — Crohn's disease of both small and large intestine with rectal bleeding
- specified complication NEC K50.818 — Crohn's disease of both small and large intestine with other complication
- specified complication NEC K50.118 — Crohn's disease of large intestine with other complication
- rectum
- small intestine (duodenum) (ileum) (jejunum) K50.00 — Crohn's disease of small intestine without complications
- with
- complication K50.019 — Crohn's disease of small intestine with unspecified complications
- abscess K50.014 — Crohn's disease of small intestine with abscess
- fistula K50.013 — Crohn's disease of small intestine with fistula
- intestinal obstruction K50.012 — Crohn's disease of small intestine with intestinal obstruction
- large intestine (colon) (rectum) involvement K50.80 — Crohn's disease of both small and large intestine without complications
- with
- complication K50.819 — Crohn's disease of both small and large intestine with unspecified complications
- abscess K50.814 — Crohn's disease of both small and large intestine with abscess
- fistula K50.813 — Crohn's disease of both small and large intestine with fistula
- intestinal obstruction K50.812 — Crohn's disease of both small and large intestine with intestinal obstruction
- rectal bleeding K50.811 — Crohn's disease of both small and large intestine with rectal bleeding
- specified complication NEC K50.818 — Crohn's disease of both small and large intestine with other complication
- rectal bleeding K50.011 — Crohn's disease of small intestine with rectal bleeding
- specified complication NEC K50.018 — Crohn's disease of small intestine with other complication
- rotaviral A08.0 — Rotaviral enteritis
- Salmonella, salmonellosis (arizonae) (cholerae-suis) (enteritidis) (typhimurium) A02.0 — Salmonella enteritis
- segmental
- septic A09 — Infectious gastroenteritis and colitis, unspecified
- Shigella
- small round structured NEC A08.19 — Acute gastroenteropathy due to other small round viruses
- spasmodic, spastic
- staphylococcal A04.8 — Other specified bacterial intestinal infections
- due to food A05.0 — Foodborne staphylococcal intoxication
- torovirus A08.39 — Other viral enteritis
- toxic NEC K52.1 — Toxic gastroenteritis and colitis
- due to
- Clostridioides difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- Clostridium difficile
- not specified as recurrent A04.72 — Enterocolitis due to Clostridium difficile, not specified as recurrent
- recurrent A04.71 — Enterocolitis due to Clostridium difficile, recurrent
- trichomonal A07.8 — Other specified protozoal intestinal diseases
- tuberculous A18.32 — Tuberculous enteritis
- typhosa A01.00 — Typhoid fever, unspecified
- ulcerative (chronic)
- viral A08.4 — Viral intestinal infection, unspecified
- adenovirus A08.2 — Adenoviral enteritis
- enterovirus A08.39 — Other viral enteritis
- Rotavirus A08.0 — Rotaviral enteritis
- small round structured NEC A08.19 — Acute gastroenteropathy due to other small round viruses
- specified NEC A08.39 — Other viral enteritis
- virus specified NEC A08.39 — Other viral enteritis
Don't confuse with (Excludes1 for K52.9)
Common questions about enteritis ICD-10 codes
What is the ICD-10 code for enteritis?
- K52.9 — Noninfective gastroenteritis and colitis, unspecified. More specific codes apply when the documentation supports them: A08.2, A02.0, K52.29, K52.81 and others below.
What is the ICD-10 code for adenovirus enteritis?
- A08.2 — Adenoviral enteritis.
What is the ICD-10 code for aertrycke infection enteritis?
- A02.0 — Salmonella enteritis.
What is the ICD-10 code for allergic enteritis?
- K52.29 — Other allergic and dietetic gastroenteritis and colitis.
What is the ICD-10 code for amebic enteritis?
- A06.0 — Acute amebic dysentery.
What is the ICD-10 code for astrovirus enteritis?
- A08.32 — Astrovirus enteritis.
What is the ICD-10 code for bacillary nos enteritis?
- A03.9 — Shigellosis, unspecified.
Is K52.9 billable?
- Yes. K52.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K52.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K52.9 as a principal diagnosis.
Is K52.9 a CC or MCC?
- No. K52.9 is neither a CC nor an MCC under MS-DRG v44.0.