ICD-10 Code for Enteritis
Also indexed as (acute) (diarrheal) (hemorrhagic) (noninfective)
The ICD-10-CM code for enteritis is K52.9 — Noninfective gastroenteritis and colitis, unspecified. This is the code the Alphabetic Index gives for enteritis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
BillableUnspecified
K52.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which enteritis code should you use?
The Alphabetic Index lists 76 codes under Enteritis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| adenovirus | A08.2 | Adenoviral enteritis | |
| aertrycke infection | A02.0 | Salmonella enteritis | |
| allergic | K52.29 | Other allergic and dietetic gastroenteritis and colitis | |
| amebic | A06.0 | Acute amebic dysentery | |
| astrovirus | A08.32 | Astrovirus enteritis | |
| bacillary NOS | A03.9 | Shigellosis, unspecified | |
| bacterial | A04.9 | Bacterial intestinal infection, unspecified | |
| 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 | K52.9 | Noninfective gastroenteritis and colitis, unspecified | |
| 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 | |
| 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 | A09 | Infectious gastroenteritis and colitis, unspecified | |
| fulminant | K55.019 | Acute (reversible) ischemia of small intestine, extent unspecified | |
| giardial | A07.1 | Giardiasis [lambliasis] | |
| infectious NOS | A09 | Infectious gastroenteritis and colitis, unspecified | |
| ischemic | K55.9 | Vascular disorder of intestine, unspecified | |
| microsporidial | A07.8 | Other specified protozoal intestinal diseases | |
| necroticans | A05.2 | Foodborne Clostridium perfringens [Clostridium welchii] intoxication | |
| noninfectious | K52.9 | Noninfective gastroenteritis and colitis, unspecified | |
| norovirus | A08.11 | Acute gastroenteropathy due to Norwalk agent | |
| parasitic NEC | B82.9 | Intestinal parasitism, unspecified | |
| protozoal | A07.9 | Protozoal intestinal disease, unspecified | |
| radiation | K52.0 | Gastroenteritis and colitis due to radiation | |
| regional | K50.90 | Crohn's disease, unspecified, without complications | |
| rotaviral | A08.0 | Rotaviral enteritis | |
| Salmonella, salmonellosis | A02.0 | Salmonella enteritis | |
| septic | A09 | Infectious gastroenteritis and colitis, unspecified | |
| small round structured NEC | A08.19 | Acute gastroenteropathy due to other small round viruses | |
| staphylococcal | A04.8 | Other specified bacterial intestinal infections | |
| torovirus | A08.39 | Other viral enteritis | |
| toxic NEC | K52.1 | Toxic gastroenteritis and colitis | |
| trichomonal | A07.8 | Other specified protozoal intestinal diseases | |
| tuberculous | A18.32 | Tuberculous enteritis | |
| typhosa | A01.00 | Typhoid fever, unspecified | |
| viral | A08.4 | Viral intestinal infection, unspecified |
Enteritis amebic
Enteritis bacterial
| specified NEC | A04.8 | Other specified bacterial intestinal infections |
Enteritis Clostridioides difficile
Enteritis Clostridium
Enteritis 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 | |
| torovirus | A08.39 | Other viral enteritis | |
| Yersinia enterocolitica | A04.6 | Enteritis due to Yersinia enterocolitica |
Enteritis infectious NOS
| specified organism NEC | A08.8 | Other specified intestinal infections | |
| due to › adenovirus | A08.2 | Adenoviral enteritis | |
| due to › Aerobacter aerogenes | A04.8 | Other specified bacterial intestinal infections | |
| due to › Arizona | A02.0 | Salmonella enteritis | |
| due to › bacteria NOS | A04.9 | Bacterial intestinal infection, unspecified | |
| due to › Campylobacter | A04.5 | Campylobacter enteritis | |
| due to › Clostridium perfringens | A04.8 | Other specified bacterial intestinal infections | |
| due to › Enterobacter aerogenes | A04.8 | Other specified bacterial intestinal infections | |
| due to › enterovirus | A08.39 | Other viral enteritis | |
| due to › Escherichia coli | A04.4 | Other intestinal Escherichia coli infections | |
| due to › Staphylococcus | A04.8 | Other specified bacterial intestinal infections | |
| due to › virus NEC | A08.4 | Viral intestinal infection, unspecified | |
| due to › Yersinia enterocolitica | A04.6 | Enteritis due to Yersinia enterocolitica | |
| due to › bacteria NOS › specified NEC | A04.8 | Other specified bacterial intestinal infections | |
| due to › Clostridioides difficile › not specified as recurrent | A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent | |
| due to › Clostridioides difficile › recurrent | A04.71 | Enterocolitis due to Clostridium difficile, recurrent | |
| due to › Clostridium difficile › not specified as recurrent | A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent | |
| due to › Clostridium difficile › recurrent | A04.71 | Enterocolitis due to Clostridium difficile, recurrent | |
| due to › Escherichia coli › enteroaggregative | A04.4 | Other intestinal Escherichia coli infections | |
| due to › Escherichia coli › enterohemorrhagic | A04.3 | Enterohemorrhagic Escherichia coli infection | |
| due to › Escherichia coli › enteroinvasive | A04.2 | Enteroinvasive Escherichia coli infection | |
| due to › Escherichia coli › enteropathogenic | A04.0 | Enteropathogenic Escherichia coli infection | |
| due to › Escherichia coli › enterotoxigenic | A04.1 | Enterotoxigenic Escherichia coli infection | |
| due to › Escherichia coli › specified NEC | A04.4 | Other intestinal Escherichia coli infections | |
| due to › specified › bacteria NEC | A04.8 | Other specified bacterial intestinal infections | |
| due to › specified › virus NEC | A08.39 | Other viral enteritis | |
| due to › virus NEC › specified type NEC | A08.39 | Other viral enteritis |
Enteritis ischemic
Enteritis protozoal
| specified NEC | A07.8 | Other specified protozoal intestinal diseases |
Enteritis regional
| large intestine | K50.10 | Crohn's disease of large intestine without complications | |
| small intestine | K50.00 | Crohn's disease of small intestine without complications | |
| with › complication | K50.919 | Crohn's disease, unspecified, with unspecified complications | |
| with › complication › abscess | K50.914 | Crohn's disease, unspecified, with abscess | |
| with › complication › fistula | K50.913 | Crohn's disease, unspecified, with fistula | |
| with › complication › intestinal obstruction | K50.912 | Crohn's disease, unspecified, with intestinal obstruction | |
| with › complication › rectal bleeding | K50.911 | Crohn's disease, unspecified, with rectal bleeding | |
| with › complication › specified complication NEC | K50.918 | Crohn's disease, unspecified, with other complication | |
| large intestine › with › complication | K50.119 | Crohn's disease of large intestine with unspecified complications | |
| small intestine › with › complication | K50.019 | Crohn's disease of small intestine with unspecified complications | |
| large intestine › with › complication › abscess | K50.114 | Crohn's disease of large intestine with abscess | |
| large intestine › with › complication › fistula | K50.113 | Crohn's disease of large intestine with fistula | |
| large intestine › with › complication › intestinal obstruction | K50.112 | Crohn's disease of large intestine with intestinal obstruction |
Enteritis staphylococcal
| due to food | A05.0 | Foodborne staphylococcal intoxication |
Enteritis viral
Enteritis allergic
| with › eosinophilic gastritis or gastroenteritis | K52.81 | Eosinophilic gastritis or gastroenteritis | |
| with › food protein-induced enterocolitis syndrome | K52.21 | Food protein-induced enterocolitis syndrome | |
| with › food protein-induced enteropathy | K52.22 | Food protein-induced enteropathy | |
| with › FPIES | K52.21 | Food protein-induced enterocolitis syndrome |
Enteritis toxic NEC
| due to › Clostridioides difficile › not specified as recurrent | A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent | |
| due to › Clostridioides difficile › recurrent | A04.71 | Enterocolitis due to Clostridium difficile, recurrent | |
| due to › Clostridium difficile › not specified as recurrent | A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent | |
| due to › Clostridium difficile › recurrent | A04.71 | Enterocolitis due to Clostridium difficile, recurrent |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources