CPT code 33418 represents percutaneous repair of a narrowed, stiff mitral valve performed with cardiopulmonary bypass and possible prosthesis placement. This invasive, image-guided cardiac procedure addresses mitral stenosis or structural abnormalities that restrict flow between the left atrium and left ventricle. Nationally, the code matters for hospital cardiovascular service lines, procedural reimbursement, and indexing of transcatheter mitral interventions in specialty reporting.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise outline of clinical context for the procedure, typical site-of-service considerations, and the payer landscape covered in the analysis. The publication summarizes benchmark metrics, common billing modifiers encountered, and related policy or coding clarifications relevant to facilities and cardiovascular clinicians. It also provides links between the clinical procedure and coding practice to support accurate claims submission and administrative documentation.

The content is intended for national audiences including hospital administrators, cardiothoracic program managers, and clinical coders seeking clear context on CPT code 33418, its clinical application, and payer considerations.