ICD-10 Code K94.03 – Colostomy malfunction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K94.03 – Colostomy malfunction
What it is
K94.03 identifies a problem with a colostomy that is not functioning as intended. Use it when the record documents malfunction, breakdown, or failure of the colostomy itself.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings may include poor stoma function, leakage, obstruction, or appliance problems related to the colostomy.
When to use this code
Use K94.03 when the provider documents colostomy malfunction as the reason for evaluation or care. It applies when the issue is specifically tied to the colostomy rather than the underlying bowel disease.
Code it for encounters addressing malfunction, revision assessment, or complications noted in the chart. If the documentation only describes skin irritation, infection, or a different ostomy issue, check documentation before assigning this code.
Do not use for
Do not use this code for routine ostomy care or an uncomplicated, functioning colostomy. Do not assign it when the problem is better described by another complication code.
Coding tip
Confirm that the provider links the complication directly to the colostomy before coding K94.03.