ICD-10 Code K55.20 – Angiodysplasia of colon without hemorrhage (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K55.20 – Angiodysplasia of colon without hemorrhage
What it is
K55.20 identifies angiodysplasia in the colon without active bleeding. It means abnormal, fragile blood vessels are present in the large intestine, but no hemorrhage is documented.
Clinical signs
Clinical features vary; refer to documentation. This diagnosis may be noted on colonoscopy or imaging when vascular malformations are seen, but the record does not describe bleeding.
When to use this code
Use K55.20 when the provider documents colonic angiodysplasia and specifically states there is no hemorrhage. It is appropriate for incidental findings or follow-up evaluations where the lesion is present but not bleeding. If bleeding is documented, check documentation for the correct code.
Do not use for
Do not use this code for angiodysplasia with gastrointestinal bleeding or when the site is not the colon. If the documentation is unclear about hemorrhage, check documentation.
Coding tip
Confirm both the anatomic site and the absence of bleeding before assigning K55.20.