Benign carcinoid tumor of the thymus

This code signifies a non-cancerous neuroendocrine tumor originating in the thymus gland. Carcinoid tumors are slow-growing and typically do not metastasize, but they can produce hormones that cause various symptoms. In the thymus, they are often discovered incidentally or due to local mass effects.

Use this code when documentation explicitly states a "benign carcinoid tumor of the thymus." This diagnosis is typically confirmed by pathology reports following biopsy or surgical excision. It applies to cases where the tumor is localized and shows no evidence of malignancy.

• Ensure the pathology report confirms "benign" and "carcinoid" histology.
• Distinguish from malignant thymic neoplasms (C37) or other benign thymic cysts/tumors (D15.0).
• Code any associated carcinoid syndrome symptoms separately, if present and documented.