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ICD-10-CM 2027 diagnosis code

K52.0Gastroenteritis and colitis due to radiation

✓ Billable / specificCC — complication/comorbidity

K52.0 is a valid, billable ICD-10-CM code for gastroenteritis and colitis due to radiation. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K52.0

K52.0 is the ICD-10-CM diagnosis code for gastroenteritis and colitis due to radiation. It belongs to category K52 (other and unspecified noninfective gastroenteritis and colitis), block K50-K52 (noninfective enteritis and colitis) and chapter 11 (diseases of the digestive system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within K52 (other and unspecified noninfective gastroenteritis and colitis), K52.0 is specifically for gastroenteritis and colitis due to radiation. Related codes cover toxic gastroenteritis and colitis (K52.1), allergic and dietetic gastroenteritis and colitis (K52.2), indeterminate colitis (K52.3), other specified noninfective gastroenteritis and colitis (K52.8) and noninfective gastroenteritis and colitis, unspecified (K52.9).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 558.1 (gastroenteritis and colitis due to radiation).

Notes that apply from higher levels

Instructions written at a parent level also apply to K52.0.

Broader instructions also apply from K50-K52 Noninfective enteritis and colitis and Chapter 11: Diseases of the digestive system.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to K52.0.

Codes whose notes reference K52.0

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 558.1Gastroenteritis and colitis due to radiationexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about K52.0

Is K52.0 billable?

Yes. K52.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K52.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K52.0 as a principal diagnosis.

Is K52.0 a CC or MCC?

K52.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does K52.0 group to?

K52.0 is used in the MS-DRG v44.0 logic for MS-DRG 393 (Other Digestive System Diagnoses with MCC), MS-DRG 394 (Other Digestive System Diagnoses with CC) and MS-DRG 395 (Other Digestive System Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for K52.0?

The CMS General Equivalence Mappings map K52.0 to ICD-9-CM 558.1.