2025 ICD-10-CM code C7B.04
(Active) Effective Date: N/A Secondary neuroendocrine tumors - Secondary carcinoid tumors Chapter 2: Neoplasms Feed
Secondary carcinoid tumor of the peritoneum.This indicates metastasis of carcinoid tumor to the peritoneum.
Medical necessity is based on the presence of metastatic carcinoid tumor in the peritoneum, requiring treatment or palliative care.
Physicians diagnose based on history, symptoms, physical exam, lab tests (CBC, tumor markers, serotonin), and imaging (CT, MRI, PET). Treatment depends on severity, prior treatment, health, and progression, and may include chemotherapy, radiation, and/or surgery.
In simple words: Carcinoid tumor has spread to the lining of your abdomen (peritoneum). This is a secondary cancer, meaning it originated elsewhere in the body.
Secondary carcinoid tumor of the peritoneum refers to the spread of carcinoid tumor cells from a primary site to the peritoneum (the lining of the abdominal cavity), usually via bloodstream or lymphatic channels.
Example 1: A patient with a history of lung carcinoid tumor presents with abdominal distension and pain. Imaging reveals multiple nodules in the peritoneum, consistent with metastatic carcinoid., During a routine follow-up of a patient treated for small intestinal carcinoid, a CT scan shows a small carcinoid deposit on the peritoneum., A patient undergoing surgery for appendicitis is found to have a small carcinoid tumor in the appendix and microscopic spread to the peritoneum.
Documentation should include the primary site of the carcinoid tumor, confirmation of peritoneal involvement (e.g., imaging, biopsy), and any associated symptoms or complications.
- Specialties:Oncology, gastroenterology, general surgery
- Place of Service:Inpatient Hospital, Outpatient Hospital, Physician's Office