CPT code 33425 represents an open mitral valve repair procedure performed with cardiopulmonary bypass to dilate a stenosed mitral valve. This high-acuity cardiac surgery is typically delivered in a hospital operating room with cardiothoracic surgical and perfusion teams. Nationally, procedures coded with CPT code 33425 are significant due to their resource intensity, implications for surgical quality metrics, and impact on inpatient cardiac surgery volumes and costs.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, payer coverage considerations and common modifiers used in billing, and an overview of typical sites of service. The publication also summarizes benchmarks relevant to utilization and reimbursement patterns, highlights important coding nuances for hospital billing lines, and outlines areas where policy updates and payer-specific edits commonly affect claim adjudication.

This summary provides clinicians, coding professionals, and policy analysts with a focused briefing on CPT code 33425: what the code denotes, why it matters in hospital-based cardiac care, and which payers and coding practices are most relevant for claims and policy review. Data not available in the input is noted where applicable.