ICD-10 Code C46.5 – Kaposi’s sarcoma of lung (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C46.5 – Kaposi’s sarcoma of lung
What it is
C46.5 identifies Kaposi’s sarcoma involving the lung. Use this code when documentation specifies pulmonary Kaposi’s sarcoma, a malignant vascular tumor affecting lung tissue.
Clinical signs
Findings may include respiratory symptoms and radiographic lung lesions, but clinical features vary; refer to documentation. Diagnosis is usually supported by imaging, pathology, or specialist assessment.
When to use this code
Use C46.5 when the provider documents Kaposi’s sarcoma in the lung or pulmonary involvement of Kaposi’s sarcoma. Apply it for confirmed disease in lung tissue, not just skin or another organ. If the note is unclear about site, check documentation before coding.
Do not use for
Do not use this code for Kaposi’s sarcoma limited to skin, lymph nodes, or other nonpulmonary sites. Check documentation if the lung is only suspected or not specifically identified.
Coding tip
Code the documented anatomic site exactly; pulmonary involvement is coded differently from cutaneous or unspecified Kaposi’s sarcoma.