ICD-10 Code C46.50 – Kaposi’s sarcoma of unspecified lung (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C46.50 – Kaposi’s sarcoma of unspecified lung
What it is
C46.50 identifies Kaposi’s sarcoma involving the lung when the site is not further specified. Use it for a malignant vascular tumor documented in the lung without a more precise anatomic detail.
Clinical signs
Clinical features vary; refer to documentation. Pulmonary Kaposi’s sarcoma may be noted on imaging, bronchoscopy, or pathology, often with respiratory symptoms such as cough or shortness of breath.
When to use this code
Use this code when the provider documents Kaposi’s sarcoma of the lung but does not identify a more specific lung site. It also fits cases where the record confirms pulmonary involvement and the location remains unspecified. Code from the documented diagnosis, not suspicion alone.
Do not use for
Do not use C46.50 if the record specifies a different lung site or another organ affected by Kaposi’s sarcoma. Do not assign it for suspected disease or for non-pulmonary Kaposi’s sarcoma.
Coding tip
If the lung site is unclear, code the unspecified lung diagnosis only after confirming the documentation does not name a more specific location.