Summary & Overview
CPT 33702: Closure of Sinus of Valsalva–Coronary Artery Fistula
CPT code 33702 denotes surgical closure of a fistula between the sinus of Valsalva and a coronary artery, a rare but clinically significant cardiac repair intended to prevent rupture and downstream ischemic or hemodynamic complications. Nationally, this code represents a specialized cardiothoracic surgical service performed in operating rooms or cardiac surgery suites, typically within inpatient or advanced outpatient surgical settings. Its correct use affects hospital case mix, procedural tracking, and payer reimbursement for high-acuity cardiac interventions.
Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of clinical context for the procedure, common payer coverage considerations, and benchmarking elements relevant to utilization and billing practice. The publication outlines where CPT code 33702 fits within procedural coding for cardiac surgery, summarizes expected service settings, and flags common modifiers and operational issues for coding teams.
This summary is intended for coding professionals, revenue cycle managers, and clinicians involved in perioperative documentation. It highlights the clinical rationale for the procedure, operational implications for hospitals and surgical centers, and the key areas to review when assigning CPT code 33702.
Billing Code Overview
CPT code 33702 describes a surgical procedure to close a fistula between the sinus of Valsalva and a coronary artery. The procedure addresses an abnormal vascular connection to prevent rupture and related hemodynamic compromise.
Service Type: Surgical repair of cardiac fistula
Typical Site of Service: Operating room or cardiac surgery suite in an inpatient or specialized outpatient surgical facility
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Clinical & Coding Specifications
Clinical Context
A typical patient is an adult presenting with symptoms of a ruptured or enlarging sinus of Valsalva aneurysm creating a fistulous connection to a coronary artery, or an incidentally discovered sinus of Valsalva-to-coronary artery fistula at risk for rupture. Patients often have progressive dyspnea, chest pain, heart failure signs (volume overload, pulmonary edema), a new continuous murmur, or ischemic symptoms if coronary perfusion is compromised. Diagnostic workflow commonly includes transthoracic and transesophageal echocardiography to define the defect, coronary angiography or CT angiography to delineate the fistulous tract and coronary anatomy, and cardiac catheterization to assess hemodynamics.
The procedural setting is typically the cardiac operating room or a hybrid catheterization/operating suite with cardiothoracic surgery and interventional cardiology available. The procedure involves surgical exposure of the aortic root, identification of the sinus of Valsalva defect and fistulous connection to the coronary artery, and closure of the fistula by direct suture, patch repair, or coronary artery reconstruction to prevent rupture and restore normal coronary flow. Typical perioperative steps include general anesthesia, intraoperative transesophageal echocardiography for localization and assessment of repair, cardiopulmonary bypass as needed, and postoperative ICU monitoring for hemodynamics and myocardial ischemia. Usual sites of service are the inpatient operating room, hybrid OR, or cardiac catheterization lab when a hybrid endovascular approach is used.
Coding Specifications
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