Summary & Overview
CPT 36861: Balloon Catheter Thrombectomy from Cannula
CPT code 36861 denotes a percutaneous thrombectomy procedure in which a provider removes a clot from an existing cannula using a balloon catheter. This targeted vascular intervention is used to restore flow through cannula-based access and can be clinically important for patients with occluded vascular access or device-associated thrombus. Nationally, the code represents an episodic, procedure-driven service commonly performed in hospital interventional suites or operating rooms.
Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of the clinical context for CPT code 36861, typical sites of service, common billing modifiers and coding considerations (when available), and an overview of payer coverage patterns. The publication summarizes benchmark metrics where available and highlights recent policy or coding guidance that affects billing and reimbursement for balloon-catheter thrombectomy from cannulas.
This resource is intended to help coding professionals, clinicians, and revenue cycle staff understand the code’s clinical intent, align documentation to support medical necessity, and navigate payer-specific payment practices. Data not available in the input will be identified as such in the relevant sections.
Billing Code Overview
CPT code 36861 describes a procedure in which a provider removes a thrombus (clot) from a previously placed cannula using a balloon catheter. This is a vascular intervention focused on clot extraction from an existing cannula access site.
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Service type: Percutaneous thrombectomy (clot removal) via cannula using a balloon catheter
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Typical site of service: Hospital-based vascular interventional suite or operating room; may also occur in specialized interventional radiology or vascular surgery settings
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with a tunneled hemodialysis central venous catheter presents with acute catheter dysfunction characterized by inability to achieve adequate blood flow for dialysis. The patient has signs consistent with intraluminal thrombosis (increased venous pressures, diminished dialysis clearance, and difficulty with aspiration). After attempt at conservative management (tissue plasminogen activator instillation) is unsuccessful or contraindicated, the interventionalist schedules a catheter-directed mechanical thrombectomy. In the procedure the provider accesses the existing cannula, inserts a balloon thrombectomy catheter, inflates the balloon distal to the thrombus, and withdraws the balloon while maintaining negative pressure on the catheter to extract clot from the cannula lumen. The procedure is typically performed in an interventional radiology suite, vascular access clinic, or an operating room under local anesthesia with conscious sedation. Pre-procedure workflow includes review of indication, anticoagulation status, vascular access assessment, and informed consent. Post-procedure workflow includes assessment of catheter patency, hemostasis at the access site, monitoring for complications (embolization, bleeding, vessel injury), documentation of device used and clot removal, and communication with the dialysis team for timing of next dialysis session.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Normal, baseline service | When the procedure represents the usual, standard service provided by the physician without unusual circumstances |