Summary & Overview
CPT 33512: Triple Coronary Artery Bypass Using Vein Grafts
CPT code 33512 represents a triple coronary artery bypass graft (CABG) using three vein segments, commonly harvested from the leg, to bypass obstructed coronary arteries. This major cardiac surgical procedure is a cornerstone of revascularization therapy for patients with multivessel coronary artery disease and persistent ischemic symptoms. Nationally, CABG procedures like those described by 33512 remain critical for mortality and symptom reduction in selected patients and are a frequent focus of hospital cardiovascular service lines and payer coverage policies.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical intent and typical care settings, an explanation of common billing and coding considerations, and national reimbursement and utilization benchmarks where available. The publication also outlines policy and coverage themes relevant to major commercial payers and Medicare, and highlights clinical context such as typical indications and expected site-of-service patterns. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 33512 describes a surgical coronary artery bypass procedure in which the provider grafts three vein segments, typically harvested from another site such as the leg, to bypass damaged coronary vessels. The procedure is performed to restore myocardial blood flow, improve cardiac function, and reduce symptoms such as angina.
Service type: Cardiac surgical revascularization (triple coronary artery bypass grafting using vein grafts)
Typical site of service: Inpatient hospital operating room
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with a history of hypertension, hyperlipidemia, and exertional angina presents with progressive chest pain and limited functional capacity despite optimal medical therapy. Coronary catheterization demonstrates multivessel coronary artery disease with critical stenoses of the left anterior descending, right coronary artery, and obtuse marginal branches. The cardiothoracic surgical team schedules an elective coronary artery bypass grafting (CABG) using three vein grafts harvested from the greater saphenous vein to restore myocardial perfusion.
Preoperative workflow includes history and physical, cardiac risk stratification, pre-anesthesia evaluation, preoperative labs, ECG, chest X-ray as indicated, and informed consent specifying expected number of grafts. In the operating room, general anesthesia is induced, median sternotomy performed, and cardiopulmonary bypass initiated as required. The surgeon harvests three vein segments, constructs proximal and distal anastomoses to bypass the diseased coronary arteries, achieves hemostasis, and closes. Postoperative workflow includes ICU monitoring, hemodynamic support, pain control, surveillance for graft patency and wound complications, and discharge planning with cardiac rehabilitation referral.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default state — no modifier | When no additional modifier applies and billing is submitted under standard circumstances. |