ICD-10-CM Code K52.1

Toxic gastroenteritis and colitis

Version 2020 Billable Code

Valid for Submission

K52.1 is a billable code used to specify a medical diagnosis of toxic gastroenteritis and colitis. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code K52.1 might also be used to specify conditions or terms like antibiotic enterocolitis, antibiotic-associated diarrhea, chemical colitis, diarrhea due to alcohol intake, diarrhea due to drug, diarrhea due to drug, etc

Short Description:Toxic gastroenteritis and colitis
Long Description:Toxic gastroenteritis and colitis

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code K52.1:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Drug-induced gastroenteritis and colitis

Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

Use Additional Code

Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
  • code for adverse effect, if applicable, to identify drug T36 T50

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code K52.1 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Antibiotic enterocolitis
  • Antibiotic-associated diarrhea
  • Chemical colitis
  • Diarrhea due to alcohol intake
  • Diarrhea due to drug
  • Diarrhea due to drug
  • Diarrhea due to drug
  • Diarrhea due to ingestion of unabsorbable substances
  • Diarrhea due to laxative abuse
  • Diarrheic shellfish poisoning
  • Drug-induced colitis
  • Drug-induced enteritis
  • Drug-induced malabsorption
  • Gastroenteritis caused by drug
  • Non-infective diarrhea
  • Non-infective diarrhea
  • Non-steroidal anti-inflammatory drug-induced colitis
  • Non-steroidal anti-inflammatory drug-induced enteropathy
  • Osmotic diarrhea
  • Soap colitis
  • Toxic effect from eating shellfish
  • Toxic enteritis of small intestine caused by drug
  • Toxic enteritis of small intestine caused by substance
  • Toxic enteritis of small intestine caused by substance
  • Toxic gastroenteritis

Diagnostic Related Groups

The ICD-10 code K52.1 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert K52.1 to ICD-9

  • 558.2 - Toxic gastroenteritis

Code Classification

  • Diseases of the digestive system (K00–K93)
    • Noninfective enteritis and colitis (K50-K52)
      • Other and unsp noninfective gastroenteritis and colitis (K52)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Have you ever had the "stomach flu?" What you probably had was gastroenteritis - not a type of flu at all. Gastroenteritis is an inflammation of the lining of the intestines caused by a virus, bacteria, or parasites. Viral gastroenteritis is the second most common illness in the U.S. The cause is often a norovirus infection. It spreads through contaminated food or water or by contact with an infected person. The best prevention is frequent hand washing.

Symptoms of gastroenteritis include diarrhea, abdominal pain, vomiting, headache, fever, and chills. Most people recover with no treatment.

The most common problem with gastroenteritis is dehydration. This happens if you do not drink enough fluids to replace what you lose through vomiting and diarrhea. Dehydration is most common in babies, young children, older adults, and people with weak immune systems.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

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