2026 ICD-10-CM Diagnosis Code K52.0Gastroenteritis and colitis due to radiation

ICD-10-CM Codes›K00–K95›K50-K52›K52

ICD-10-CM K52.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K52.0 is a billable ICD-10-CM diagnosis code for gastroenteritis and colitis due to radiation. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 393 through 395. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Noninfectious gastroenteritis.

Code Identity

ICD-10-CM Code
K52.0
Billable Status
Yes — Valid for Submission
Code Describes
Gastroenteritis and colitis due to radiation
Short Description
Gastroenteritis and colitis due to radiation
Same as the full description in the CMS dataset.
Parent Code
K52
Other and unspecified noninfective gastroenteritis and colitis

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK50-K52Noninfective enteritis and colitis
CategoryK52Other and unspecified noninfective gastroenteritis and colitis
This CodeK52.0Gastroenteritis and colitis due to radiation

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute radiation colitis
  • Acute radiation enteritis of intestine
  • Chronic inflammation of small intestine caused by radiation
  • Chronic radiation colitis
  • Chronic radiation enteropathy of intestine
  • Colitis caused by radiation
  • Noninfective enteritis and colitis
  • Radiation enteritis of intestine
  • Radiation enterocolitis
  • Radiation gastritis
  • Radiation gastroenteritis
  • Radiation induced enteritis of small intestine

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Colitis(acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)
      • due to radiation
    • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
      • radiation
    • Enterocolitis
      • radiation
    • Gastroenteritis(acute) (chronic) (noninfectious)
      • due to
        • radiation

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DIG022
Noninfectious gastroenteritis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

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.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert K52.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
558.1 Radiation gastroenterit
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K52.0Overview

Is K52.0 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report gastroenteritis and colitis due to radiation on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K52.0 group to?

When gastroenteritis and colitis due to radiation is the principal diagnosis on an inpatient stay, it groups to MS-DRG 393, 394, 395, with relative weights from 0.6490 to 1.5993 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K52.0?

Under the General Equivalence Mappings, gastroenteritis and colitis due to radiation converts to ICD-9-CM 558.1 (radiation gastroenterit). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.