2027 ICD-10-CM Diagnosis Code K52.0Gastroenteritis and colitis due to radiation
ICD-10-CM Codes›K00–K95›K50-K52›K52
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 393 through 395. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 1 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Noninfectious gastroenteritis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute inflammation of intestine caused by ionizing radiation
- Acute radiation colitis
- Chronic inflammation of intestine caused by ionizing radiation
- Chronic inflammation of small intestine caused by ionizing radiation
- Chronic radiation colitis
- Colitis caused by ionizing radiation
- Gastritis caused by ionizing radiation
- Inflammation of intestine caused by ionizing radiation
- Inflammation of small intestine caused by ionizing radiation
- Noninfective enteritis and colitis
- Radiation enterocolitis
- Radiation gastroenteritis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K52.0: its own notes plus those printed at block K50-K52 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- noninfective inflammatory bowel disease
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name K52.0, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming K52.0: they are not reported together with it, unless the two conditions are unrelated.
- T66 Radiation sickness, unspecifiedradiation gastroenteritis and colitis (K52.0)
Excludes2 2
These codes carry an Excludes2 note naming K52.0: its condition is not part of those codes, and both may be reported when the patient has both.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) See Also: Enteritis; K52.9
due to radiation K52.0
Enterocolitis See Also: Enteritis; K52.9
radiation K52.0
Gastroenteritis (acute) (chronic) (noninfectious) See Also: Enteritis; K52.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Colonic Diseases
Your colon, also known as the large intestine, is part of your digestive system. It's a long, hollow tube at the end of your digestive tract where your body makes and stores stool. Many disorders affect the colon's ability to work properly. Some of these include:
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.
Code HistoryHistory
Questions About K52.0Overview
What is the ICD-10 code for gastroenteritis and colitis due to radiation?
The ICD-10-CM code for gastroenteritis and colitis due to radiation is K52.0 (sometimes written as K520). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 394, 395, 393, with relative weights from 0.6379 to 1.5877 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K52.0 a CC or MCC?
CMS lists K52.0 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 1 closely related codes in its exclusion list.
Can K52.0 be reported with a code from K58?
Not as a rule. The Excludes1 note at block K50-K52, which applies to K52.0, lists "irritable bowel syndrome (K58.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
