CPT code 34451 represents an open surgical venous thrombectomy involving incisions in the leg and abdomen to access and remove thrombus from the vena cava, iliac, or femoropopliteal veins. This code captures a definitive surgical approach to venous clot removal, used in cases where endovascular techniques are unsuitable or when rapid mechanical clot extraction is necessary. The procedure has implications for acute limb- and life-saving care and for utilization patterns in vascular and general surgery services nationwide. Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for 34451, typical sites of service, and the types of surgical teams that perform it. The publication also presents payer coverage considerations, commonly used modifiers (listed separately), and benchmarks where available. Policy and billing updates that affect documentation, preauthorization expectations, and inpatient-versus-outpatient site-of-service determinations are summarized for national stakeholders. Clinical context explains indications for open thrombectomy versus alternative endovascular management, and operational notes address typical service lines and resource implications. Data not available in the input is noted where applicable.