Summary & Overview
CPT 33545: Repair of Postinfarction Ventricular Septal Defect
CPT code 33545 represents open surgical repair of a postinfarction ventricular septal defect, often performed emergently after myocardial infarction when septal rupture or an obstructing intracardiac mass impairs cardiac output. This high-acuity cardiac surgical procedure is nationally important because it addresses life-threatening mechanical complications of myocardial infarction that require specialized operative and intensive care resources.
Key payers 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 types of documentation and coding considerations commonly associated with complex cardiac surgery. The publication also summarizes relevant benchmarks and payment policy themes that affect coverage and reimbursement for high-acuity inpatient cardiac operations, highlights common modifier usage when available, and outlines where to find ICD-10 diagnosis linkage and related procedural codes.
This resource is intended for coding professionals, hospital billing managers, and policy analysts who need a national-level briefing on the clinical nature of CPT code 33545, how it fits into inpatient cardiac surgical services, and what payer coverage patterns and policy factors typically influence billing and reimbursement for postinfarction septal repair.
Billing Code Overview
CPT code 33545 describes surgical repair of a postinfarction ventricular septal defect. The procedure involves patching a defect in the ventricular septum — the wall separating the heart's ventricles — that has developed after a myocardial infarction and may include myocardial resection to remove damaged septal tissue if necessary.
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Service type: Cardiac surgical repair (open surgical intracardiac procedure)
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Typical site of service: Inpatient hospital operating room with postoperative intensive care
Clinical & Coding Specifications
Clinical Context
A 68-year-old male presents to the emergency department 4 days after an acute anterior ST-elevation myocardial infarction (MI) managed initially with percutaneous coronary intervention. He develops acute-onset hypotension, a harsh holosystolic murmur, and signs of cardiogenic shock. Echocardiography demonstrates a ventricular septal rupture with left-to-right shunt and reduced left ventricular function. The cardiothoracic surgery team evaluates the patient and schedules urgent surgical repair: patch closure of the postinfarction ventricular septal defect, with possible concomitant myocardial resection of necrotic septal tissue if needed.
Preoperative workflow includes stabilization in the intensive care unit, hemodynamic support (inotropes, intra-aortic balloon pump if indicated), repeat imaging (transthoracic and transesophageal echocardiography), informed consent, and cross-disciplinary briefing with anesthesia and perfusion. Intraoperative steps include median sternotomy, cardiopulmonary bypass, exposure of the septal defect, patch closure (synthetic or pericardial), inspection and resection of nonviable tissue when necessary, and hemostasis. Postoperative care involves intensive monitoring, ventilatory support as needed, vasoactive medication titration, serial echocardiography to assess repair integrity, and staged rehabilitation and discharge planning.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
62 | Two surgeons | Use when two surgeons work together as primary surgeons due to case complexity. |