CPT code 37243 represents an endovascular embolization procedure in which a physician intentionally partially or completely blocks blood flow to a target area to treat benign or malignant tumors (including uterine fibroids) or to induce organ ischemia or infarction. This code is used nationally for reporting image-guided vascular occlusion when embolic agents or devices are employed to achieve devascularization. The code matters because embolization is a key minimally invasive option across oncology, gynecology, and vascular therapy, with implications for utilization, facility resource planning, and payer coverage policy.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical intent and settings for the procedure, typical sites of service, and the payer landscape relevant to national coverage. The publication also summarizes common billing considerations, associated service line context, and related coding references where available. Data not available in the input is noted where relevant. This summary equips clinicians, billing staff, and policy analysts with the core facts needed to interpret and classify claims involving CPT code 37243 and to understand its role in current procedural care.