2025 ICD-10-CM code C7A.091
(Active) Effective Date: N/A Neoplasms - Malignant neuroendocrine tumors of the thymus 2: Neoplasms Feed
Malignant carcinoid tumor of the thymus.
Medical necessity is established by the presence of a malignant carcinoid tumor of the thymus confirmed by biopsy and imaging, along with associated signs and symptoms. Treatment is medically necessary to prevent further growth and spread of the cancer.
The provider diagnoses the condition based on history, symptoms, and physical examination. Laboratory tests include CBC which may show decreased white blood cells, increased ESR, and decreased hemoglobin with biopsy of the thymus tumor. Imaging tests include computerized tomography (CT) scans, magnetic resonance imaging (MRI), and positron emission tomography (PET) scans for staging malignancy. Depending on the stage of the cancer, treatment involves chemotherapy, radiation therapy, hormone therapy, and surgery to remove the tumor.
In simple words: A malignant carcinoid tumor of the thymus is a rare type of cancer that starts in the thymus, a small organ in your chest that's part of your immune system.It happens when certain cells in the thymus grow out of control.
Malignant carcinoid tumor of the thymus (an organ of the immune system that produces T-cells) refers to a type of neuroendocrine tumor (NET) that consists of abnormal growth of neuroendocrine cells of the thymus.
Example 1: A 60-year-old male presents with persistent cough, chest pain, and shortness of breath. Imaging reveals a mass in the thymus. Biopsy confirms malignant carcinoid tumor., A patient with myasthenia gravis undergoes a thymectomy. Pathology reveals an incidental malignant carcinoid tumor., A patient experiences symptoms of carcinoid syndrome (flushing, diarrhea, wheezing) and is found to have a malignant carcinoid tumor of the thymus.
Documentation should include symptoms, physical exam findings, imaging results (CT, MRI, PET), biopsy results confirming the diagnosis, and staging information.
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