Summary & Overview
CPT 33516: Coronary Artery Bypass with Six or More Vein Grafts
CPT code 33516 represents a major cardiac surgical service: coronary artery bypass grafting (CABG) using six or more vein grafts to reestablish coronary blood flow, improve myocardial function, and reduce ischemic symptoms such as angina. This procedure is significant nationally because it is associated with high resource use, extended inpatient stays, and critical implications for surgical capacity, quality measurement, and reimbursement policy across payers.
Key payers commonly relevant to coverage and payment for this service include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, typical sites of care, and the service line implications for hospital billing and case management. The publication also outlines benchmarking elements, common modifiers and billing considerations, and related coding references where available.
The report is designed to inform hospital finance leaders, coding professionals, and policy analysts about how CPT code 33516 is used in clinical practice and claims submission, the operational impacts of high-complexity CABG cases, and areas to monitor for payer policy updates and quality metrics. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 33516 describes a coronary artery bypass grafting (CABG) procedure using six or more vein grafts. The provider diverts blood flow from damaged coronary vessels by grafting in six or more vein segments taken from another site, such as the leg, to restore circulation, improve cardiac function, and reduce symptoms such as angina.
Service Type: Surgical — Coronary artery bypass grafting with multiple vein grafts
Typical Site of Service: Inpatient hospital — operating room and postoperative cardiac surgical unit
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with multivessel coronary artery disease and progressive exertional angina is evaluated after coronary angiography demonstrates severe stenoses of the left anterior descending, right coronary, and three obtuse marginal branches. Medical therapy and percutaneous coronary intervention are considered but anatomy and diffuse disease make surgical revascularization the recommended option. The patient is scheduled for coronary artery bypass grafting (CABG) using six vein graft segments (saphenous vein conduits) to bypass multiple occluded coronary arteries. Preoperative workflow includes cardiology consult, pre-op labs, echocardiography, medication reconciliation (antiplatelet/anticoagulant management), and informed consent. In the operating room, the cardiothoracic surgical team performs median sternotomy, cardiopulmonary bypass, myocardial protection, and construction of six or more graft anastomoses using harvested vein segments. Postoperative care includes intensive care monitoring, ventilator weaning, telemetry, wound care for sternotomy and leg harvest sites, guideline-directed medical therapy, and discharge planning with cardiac rehabilitation referral. Typical site of service is an inpatient hospital operating room with postoperative care in an intensive care unit or step-down unit.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier; standard reporting | Use when no specific modifier applies to the primary service |