CPT code 33504 denotes open surgical repair of a coronary artery that originates from the pulmonary artery, performed with the patient on cardiopulmonary bypass using a graft to reestablish coronary perfusion. This complex cardiothoracic procedure is clinically significant because it addresses congenital or acquired coronary anomalies that can cause myocardial ischemia and congestive heart failure; timely surgical correction can be lifesaving and may prevent progressive cardiac dysfunction. Nationally, the code represents high-acuity inpatient cardiac surgery typically billed to major commercial payers and Medicare.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, expected site-of-service and service type, and a summary of what to expect in payer coverage and billing practice. The publication outlines common billing modifiers associated with complex surgical services and points to related clinical and coding considerations. It is intended to help health system billing staff, clinical coders, and policy analysts understand the code’s clinical role and where it fits in inpatient cardiac surgical service lines.

Data not available in the input: Associated taxonomies, ICD-10 diagnoses, related codes, and detailed payer-specific reimbursement benchmarks.