CPT code 35606 identifies an open vascular bypass procedure using a synthetic graft to bypass a blockage in the subclavian artery. This operation restores arterial inflow to the upper extremity and can protect cerebral perfusion when vertebral circulation is at risk. As an operative vascular code, it carries implications for inpatient surgical scheduling, perioperative resource use, and reimbursement across major national payers.

Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for the procedure, typical sites of service, common modifiers used with operative codes, and where to look for coding and billing guidance. The publication provides benchmarks and payer policy summaries, highlights documentation elements relevant to surgical vascular bypass, and outlines areas where payers commonly apply medical necessity reviews or prior authorization requirements.

This summary is intended for billing managers, vascular surgeons, revenue cycle professionals, and policy analysts seeking a national-level briefing on coding considerations and payer engagement for synthetic subclavian artery bypass procedures represented by CPT code 35606.