2026 ICD-10-CM Diagnosis Code K92.81Gastrointestinal mucositis (ulcerative)
ICD-10-CM Codes›K00–K95›K90-K95›K92
- Billable — Valid for Submission
- Not Chronic
K92.81 is a billable ICD-10-CM diagnosis code for gastrointestinal mucositis (ulcerative). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 391 through 392. Coders also document this condition as gastrointestinal mucositis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified gastrointestinal disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Gastrointestinal mucositis
- Ulcerative gastrointestinal mucositis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code Also
- type of associated therapy, such as:
- antineoplastic and immunosuppressive drugs T45.1X
- radiological procedure and radiotherapy Y84.2
Type 2 Excludes
- mucositis ulcerative of vagina and vulva N76.81
- nasal mucositis ulcerative J34.81
- oral mucositis ulcerative K12.3
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Mucositis (ulcerative) - K12.30
- gastrointestinal - K92.81
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Mucositis(ulcerative)
- gastrointestinal
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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
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Convert K92.81 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K92.81Overview
Is K92.81 (Other specified diseases of the digestive system) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report gastrointestinal mucositis (ulcerative) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K92.81 group to?
When gastrointestinal mucositis (ulcerative) is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, with relative weights from 0.7796 to 1.2683 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of K92.81?
Under the General Equivalence Mappings, gastrointestinal mucositis (ulcerative) converts to ICD-9-CM 538 (GI mucositis (ulceratve)). 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.
