Summary & Overview
CPT 33970: Intra–Aortic Balloon Insertion via Femoral Artery
CPT code 33970 represents the open surgical insertion of an intra–aortic balloon (IAB) through the femoral artery into the aorta to restore or support blood flow in patients with interrupted or critically reduced perfusion. The code captures a high-acuity, device-based cardiovascular intervention that is performed in acute hospital settings and has implications for resource use, perioperative staffing, and device inventory nationally. Its use signals severe circulatory compromise and often accompanies complex cardiac surgical or critical care pathways.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for 33970, the typical site of service and service type, and the operational considerations tied to billing and claims processing. The publication provides benchmarks where available, outlines common modifier usage and payer interactions when present, and summarizes relevant coding relationships and potential documentation touchpoints. Data not available in the input is noted where applicable. The content is designed to inform coding professionals, revenue cycle staff, and clinical teams about the code's clinical meaning and billing posture in a national context.
Billing Code Overview
CPT code 33970 describes the surgical insertion of an intra–aortic balloon into the aorta via the femoral artery through an incision in the skin and underlying tissues. The procedure is performed to restore or support blood flow in patients with an interrupted or critically reduced systemic perfusion.
Service type: Surgical cardiovascular support procedure
Typical site of service: Inpatient operating room or hybrid cardiac catheterization/surgical suite, commonly delivered in acute care hospital settings where vascular surgery or cardiothoracic surgery teams and perioperative monitoring resources are available.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 65-year-old male with acute cardiogenic shock secondary to extensive myocardial infarction admitted to the intensive care unit with hypotension and signs of end-organ hypoperfusion (cool extremities, oliguria, rising lactate). Despite inotropic support and vasopressors the patient remains hemodynamically unstable. The interventional or cardiothoracic team decides to provide temporary mechanical circulatory support by inserting an intra-aortic balloon pump (IABP). The procedure is performed in the cardiac catheterization laboratory or operating room under sterile conditions using percutaneous femoral arterial access with local anesthesia and sedation or general anesthesia as required. The operator makes a small skin and soft tissue incision to expose the common femoral artery, achieves arterial control, and advances the IABP catheter into the descending thoracic aorta with fluoroscopic confirmation of correct positioning. Hemostasis is secured at the access site after placement and the device is connected to a console for counterpulsation timed to the cardiac cycle. Postprocedure workflow includes hemodynamic monitoring in an ICU, anticoagulation management, serial vascular assessments of the limb, and planning for device weaning or escalation to other mechanical circulatory support.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Normal / Standard service | Use when the procedure is performed as scheduled without unusual circumstances. |