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ICD-10-CM 2027 diagnosis code

K92.81Gastrointestinal mucositis (ulcerative)

✓ Billable / specificCC — complication/comorbidity

K92.81 is a valid, billable ICD-10-CM code for gastrointestinal mucositis (ulcerative). 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 K92.81

K92.81 is the ICD-10-CM diagnosis code for gastrointestinal mucositis (ulcerative). It belongs to category K92 (other diseases of digestive system), block K90-K95 (other diseases of the digestive system) 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 K92.8 (other specified diseases of the digestive system), K92.81 is specifically for gastrointestinal mucositis (ulcerative). Related codes cover other specified diseases of the digestive system (K92.89).

The conditions in its Excludes2 note aren't part of K92.81, but may be coded alongside it if the patient has both: mucositis (ulcerative) of vagina and vulva (N76.81), nasal mucositis (ulcerative) (J34.81) and oral mucositis (ulcerative) (K12.3-).

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 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), 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 538 (gastrointestinal mucositis (ulcerative)).

Coding notes

Excludes2Not included here — may be reported together if both conditions exist
  • mucositis (ulcerative) of vagina and vulva (N76.81)
  • nasal mucositis (ulcerative) (J34.81)
  • oral mucositis (ulcerative) (K12.3-)
Code alsoTwo codes may be needed; sequencing depends on circumstances
  • type of associated therapy, such as:
  • antineoplastic and immunosuppressive drugs (T45.1X-)
  • radiological procedure and radiotherapy (Y84.2)

Notes that apply from higher levels

Instructions written at a parent level also apply to K92.81.

› From K92 Other diseases of digestive system
Excludes1
  • neonatal gastrointestinal hemorrhage (P54.0-P54.3)

Broader instructions also apply from Chapter 11: Diseases of the digestive system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to K92.81.

Codes whose notes reference K92.81

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 →
  • 538Gastrointestinal mucositis (ulcerative)exact

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 K92.81

Is K92.81 billable?

Yes. K92.81 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K92.81 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K92.81 as a principal diagnosis.

Is K92.81 a CC or MCC?

K92.81 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does K92.81 group to?

K92.81 is used in the MS-DRG v44.0 logic for MS-DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC) and MS-DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without 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 K92.81?

The CMS General Equivalence Mappings map K92.81 to ICD-9-CM 538.