Summary & Overview
CPT 33505: Repair of Anomalous Coronary Artery via Pulmonary Artery Tunnel
CPT code 33505 represents an open cardiothoracic surgical repair that creates a tunnel in the pulmonary artery to access an anomalous coronary artery and reimplant it onto the aorta. This procedure addresses congestive heart failure and myocardial ischemia caused by anomalous coronary artery origin, most commonly performed in infants with congenital heart disease and occasionally in adults. Nationally, this code denotes a high-acuity, inpatient surgical service with implications for surgical quality, perioperative resource use, and specialized pediatric and adult cardiac programs.
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, typical sites of service, and the scope of services represented by the code. The publication outlines common modifiers and coding considerations, prevailing payer coverage frameworks, and benchmarks where available. It also summarizes policy and payment nuances that affect utilization and billing for this high-complexity surgical intervention.
This summary serves clinicians, coding professionals, and policy analysts seeking a national-level briefing on clinical intent, coding classification, payer coverage landscape, and the operational setting for CPT code 33505.
Billing Code Overview
CPT code 33505 describes a surgical procedure in which the provider creates a tunnel inside the pulmonary artery to access the opening of an anomalous coronary artery and anastomoses (joins) that coronary artery to the aorta. This operation is performed to treat congestive heart failure related to anomalous coronary artery origins, most often in infants with congenital heart defects and occasionally in adults.
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Service type: Open cardiothoracic surgical repair for correction of anomalous coronary artery origin
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Typical site of service: Inpatient hospital operating room, often within pediatric or adult cardiothoracic surgical units
Clinical & Coding Specifications
Clinical Context
An infant or young child presents with signs of congestive heart failure (feeding difficulty, poor weight gain, tachypnea, hepatomegaly) or an adult with unexplained ischemia and a congenital coronary anomaly. Diagnostic workup includes transthoracic echocardiography and cardiac catheterization with coronary angiography or cardiac CT to identify an anomalous coronary artery originating from the pulmonary artery (e.g., ALCAPA). After multidisciplinary review (pediatric or adult congenital cardiac surgery, cardiology, anesthesiology), the patient is taken to the operating room. Under general endotracheal anesthesia, median sternotomy and cardiopulmonary bypass are established. The surgeon creates an intrapulmonary artery tunnel or button reimplantation to access and mobilize the anomalous coronary ostium, then anastomoses the coronary artery to the aorta to restore systemic coronary perfusion. Postoperative care includes ICU monitoring, inotropic support as needed, serial echocardiography to assess ventricular function, and outpatient follow-up with cardiology for growth and function monitoring. Typical site of service is an inpatient tertiary care hospital or children's hospital with cardiothoracic surgery capability. Service type: open cardiothoracic surgical correction of anomalous coronary origin from the pulmonary artery.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Standard primary procedure code | Rarely used in modifier reporting; primary identification of the principal procedure when required by some payors |