ICD-10-CM Code K52.9

Noninfective gastroenteritis and colitis, unspecified

Version 2020 Replaced Code Billable Code

Valid for Submission

K52.9 is a billable code used to specify a medical diagnosis of noninfective gastroenteritis and colitis, unspecified. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code K52.9 might also be used to specify conditions or terms like acute and chronic colitis, acute cecitis, acute gastroenteritis, acute gastroenteritis, benign infantile seizure with mild gastroenteritis syndrome, choanal atresia, etc

Short Description:Noninfective gastroenteritis and colitis, unspecified
Long Description:Noninfective gastroenteritis and colitis, unspecified

Replaced Code

This code was replaced in the 2020 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2019. This code was replaced for the FY 2020 (October 1, 2019 - September 30, 2020).

  • K52.3 - Indeterminate 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 K52.9:

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.
  • Colitis NOS
  • Enteritis NOS
  • Gastroenteritis NOS
  • Ileitis NOS
  • Jejunitis NOS
  • Sigmoiditis NOS

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • diarrhea NOS R19.7
  • functional diarrhea K59.1
  • infectious gastroenteritis and colitis NOS A09
  • neonatal diarrhea noninfective P78.3
  • psychogenic diarrhea F45.8

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 K52.9 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:

  • Acute and chronic colitis
  • Acute cecitis
  • Acute gastroenteritis
  • Acute gastroenteritis
  • Benign infantile seizure with mild gastroenteritis syndrome
  • Choanal atresia
  • Chronic colitis
  • Chronic diarrhea
  • Chronic diarrhea due to glucoamylase deficiency
  • Chronic diarrhea of infants AND/OR young children
  • Chronic diarrhea of infants AND/OR young children
  • Chronic diarrhea of unknown origin
  • Chronic diarrhea with villous atrophy syndrome
  • Chronic non-infectious enteritis of uncertain etiology
  • Chronic non-specific colitis
  • Colitis
  • Congenital atresia of nares
  • Congenital atresia of nasopharynx
  • Congenital atresia of pharynx
  • Congenital secretory diarrhea
  • Distal colitis
  • Diversion colitis
  • Enterocolitis
  • Exacerbation of non-infective colitis
  • Gastroenteritis
  • Hemorrhage of colon
  • Hemorrhagic colitis
  • Hemorrhagic enteritis
  • Hemorrhagic gastroenteritis
  • Idiopathic chronic inflammatory bowel disease
  • Idiopathic colitis
  • Ileitis
  • Immune dysregulation, inflammatory bowel disease, arthritis, recurrent infection syndrome
  • Infantile gastroenteritis
  • Infantile gastroenteritis
  • Inflammation of large intestine
  • Inflammatory bowel disease
  • Inflammatory disorder of digestive system
  • Inflammatory disorder of digestive tract
  • Inflammatory polyps co-occurrent and due to inflammatory bowel disease
  • Intractable diarrhea with choanal atresia and eye anomaly syndrome
  • Iritis with inflammatory bowel disease
  • Jejunitis
  • Juvenile arthritis of inflammatory bowel disease
  • Nonbacterial gastroenteritis of infant
  • Noninfectious colitis
  • Noninfectious enteritis
  • Noninfectious gastroenteritis
  • Noninfectious ileitis
  • Noninfectious jejunitis
  • Noninfectious sigmoiditis
  • Non-infective enteritis and colitis
  • Non-specific colitis
  • Obesity, colitis, hypothyroidism, cardiac hypertrophy, developmental delay syndrome
  • Pericolitis
  • Perisigmoiditis
  • Phlegmonous enteritis
  • Phlegmonous enteritis of duodenum
  • Secretory diarrhea
  • Seronegative arthritis
  • Seronegative arthritis secondary to inflammatory bowel disease
  • Sigmoiditis
  • Transient neonatal colitis
  • Typhlitis
  • Villous atrophy of intestine

Diagnostic Related Groups

The ICD-10 code K52.9 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 K52.9 to ICD-9

  • 558.9 - Noninf gastroenterit NEC (Approximate Flag)

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

Digestive Diseases

When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion.

Your digestive system is a series of hollow organs joined in a long, twisting tube. It runs from your mouth to your anus and includes your esophagus, stomach, and small and large intestines. Your liver, gallbladder and pancreas are also involved. They produce juices to help digestion.

There are many types of digestive disorders. The symptoms vary widely depending on the problem. In general, you should see your doctor if you have

  • Blood in your stool
  • Changes in bowel habits
  • Severe abdominal pain
  • Unintentional weight loss
  • Heartburn not relieved by antacids

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

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