ICD-10 Code C46.4 – Kaposi’s Sarcoma of Gastrointestinal Sites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C46.4 – Kaposi’s sarcoma of gastrointestinal sites
What it is
C46.4 identifies Kaposi’s sarcoma affecting the gastrointestinal tract. Use it when documentation specifies involvement of the stomach, intestines, or other GI sites.
Clinical signs
Clinical features vary; refer to documentation. GI Kaposi’s sarcoma may be found on endoscopy or imaging, often with mucosal lesions or bleeding.
When to use this code
Use C46.4 when the record clearly states Kaposi’s sarcoma in a gastrointestinal location. This applies whether the diagnosis is confirmed by pathology, endoscopy, or a clinician’s documented assessment. If the site is described only as “visceral” or is unclear, check documentation.
Do not use for
Do not use this code for Kaposi’s sarcoma limited to skin, lymph nodes, or other non-GI sites. If the gastrointestinal site is not documented, do not assume C46.4.
Coding tip
Capture the exact anatomic site in the note; if multiple sites are involved, code each documented site separately when supported.