Summary & Overview
CPT 33501: Coronary Artery Fistula Ligation
CPT code 33501 represents surgical ligation or closure of a coronary artery fistula performed without cardiopulmonary bypass. This procedure addresses abnormal vascular connections between a coronary artery and a pulmonary vein or a cardiac chamber to reduce risks such as thrombus, endocarditis, and aneurysm rupture. Nationally, the code is relevant to cardiac surgeons, hospital billing operations, and payers managing high-acuity cardiovascular encounters.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, typical settings where it is performed, and the payer landscape covered in the analysis. The publication outlines benchmarking considerations, common billing modifiers associated with cardiac surgical services, and the clinical rationale that supports use of the code.
The content is intended to help coding and revenue cycle staff, clinical leaders, and policy analysts understand what CPT code 33501 denotes, where the service is typically delivered, and which major commercial and public payers are relevant to reimbursement and coverage discussions. Data not available in the input is clearly noted where applicable.
Billing Code Overview
CPT code 33501 describes a surgical procedure in which the provider ties off or closes a fistula between a coronary artery and either a pulmonary vein or a cardiac chamber without using cardiopulmonary bypass. The procedure is performed to prevent complications such as thrombus formation, endocarditis, or aneurysm rupture.
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Service type: Cardiac surgical procedure to ligate or close a coronary artery fistula
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Typical site of service: Inpatient or outpatient surgical setting with cardiovascular surgical capability (operating room or cardiac surgical suite)
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult referred for surgical correction of a coronary artery fistula discovered during evaluation for chest pain, exertional dyspnea, or incidental finding on coronary angiography or echocardiography. The patient may present with a continuous murmur, signs of ischemia, heart failure symptoms, or progressive left-to-right shunt physiology. Preoperative workup includes transthoracic or transesophageal echocardiography, cardiac catheterization with coronary angiography to define fistula origin and termination, and standard preoperative labs and imaging.
The procedure 33501 is an open surgical ligation/closure of the coronary artery fistula performed without cardiopulmonary bypass. Typical workflow: preoperative cardiac imaging and catheterization; informed consent and risk assessment; general anesthesia; median sternotomy or limited thoracotomy exposure depending on anatomy; identification of the fistulous connection between a coronary artery and a cardiac chamber or pulmonary vein; surgical ligation or oversewing of the fistula with preservation of coronary artery flow; intraoperative assessment of myocardial perfusion and hemostasis; closure and postoperative monitoring in a cardiac care unit. Postoperative care includes telemetry, echocardiographic follow-up to confirm closure, and routine wound and anticoagulation management as indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 |