CPT code 33370 covers percutaneous placement of cerebral embolic protection devices during the same session as a primary transcatheter aortic valve replacement (TAVR/TAVI). This adjunctive procedural code captures a preventative intervention intended to reduce periprocedural cerebral embolic events, a clinically significant concern for TAVR patients given the risk of stroke and neurocognitive injury.

Key national payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Coverage and payment policies for adjunctive cerebral protection vary across commercial plans and Medicare, with differences driven by evidence assessment, coding guidance, and bundled payment arrangements for TAVR episodes.

Readers will gain a concise overview of what 33370 represents clinically and operationally, typical sites of service, and which major payers are relevant to coverage discussions. The publication also outlines where to find benchmarks, common modifiers, and policy-relevant updates that affect billing and reimbursement for adjunctive embolic protection during TAVR. Data not available in the input is noted where applicable, and the piece is intended as a national-level reference for coding, clinical context, and payer policy considerations.