CPT code 93573 represents pulmonary artery angiography performed during cardiac catheterization, a diagnostic invasive imaging service that visualizes the right and left pulmonary arteries and assesses pulmonary blood flow. This procedure is clinically important for evaluating pulmonary vascular anatomy and hemodynamics in patients with suspected pulmonary embolism, pulmonary hypertension, congenital heart disease, or other cardiopulmonary conditions. Nationally, accurate coding and documentation of this service affect clinical records, utilization tracking, and payer adjudication for invasive cardiology services.

Key payers commonly involved in coverage and reimbursement for this service include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of what CPT code 93573 represents, typical sites of service, and the clinical context in which the procedure is used. The publication also summarizes benchmarks and policy-relevant topics readers should consider, such as coding guidance, documentation expectations, and where to locate payer-specific coverage rules. Data not available in the input will be noted where applicable. The content is intended for national audiences including clinicians, billing professionals, and policy analysts seeking concise information on the code's clinical role and administrative implications.