Summary & Overview
CPT 0524T: Endovenous Chemical Ablation for Varicose Vein
CPT code 0524T defines an image-guided endovenous chemical ablation procedure for varicose veins in which a balloon isolates the treatment zone, a catheter is advanced into the varicose segment, and a liquid or foam sclerosant is injected to ablate the vein. The code is inclusive of vascular access, catheter advancement, imaging, and intra-procedural monitoring, and therefore supersedes separate reporting for those components. Nationally, this code matters for vascular specialists, interventional radiologists, ambulatory surgical centers, and payers because it affects coding consistency, bundled payment determinations, and prior authorization workflows for minimally invasive varicose vein treatments.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find concise benchmarks on coverage practice and reimbursement posture, summaries of payer policy themes, clinical context on when this endovenous chemical ablation is typically used, and notes on billing and documentation elements that commonly affect claims adjudication. The publication provides a practical reference for clinicians, coding staff, and revenue cycle teams seeking clear, national-level guidance on the clinical intent and billing scope of 0524T. Data not available in the input are noted where applicable.
Billing Code Overview
CPT code 0524T describes a percutaneous chemical ablation procedure for varicose veins in which the provider isolates the treatment area with a balloon, inserts a catheter into the varicose vein, and injects a liquid or foam sclerosant under imaging guidance to ablate the targeted vein segment. The code bundles vascular access, catheter advancement, imaging, and monitoring; no portion of the procedure may be reported separately.
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Service type: Image-guided endovenous chemical ablation
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Typical site of service: Outpatient vascular or interventional radiology suite, ambulatory surgical center, or hospital outpatient department
Clinical & Coding Specifications
Clinical Context
A 56-year-old ambulatory female with symptomatic lower-extremity varicose veins presents to the vascular interventional suite for percutaneous chemical ablation of an incompetent superficial vein. She reports pain, aching, and visible bulging of the great saphenous vein with recurrent swelling after conservative measures (compression stockings and exercise). Duplex ultrasound confirms reflux of the targeted segment. In the procedure room under ultrasound and fluoroscopic guidance, the provider obtains percutaneous venous access, advances a catheter into the affected segment, isolates the treatment zone with an occlusion balloon, and injects a sclerosant foam or liquid to ablate the varicose portion of the vein. Vascular access, catheter manipulation, imaging guidance, and intra-procedural monitoring are included in this service. Typical pre-procedure workflow includes informed consent, ultrasound mapping, medication reconciliation, and brief sedation or local anesthesia. Typical post-procedure workflow includes duplex ultrasound to confirm occlusion, application of compression dressing or stockings, discharge instructions, and short-term follow-up for symptom assessment and duplex surveillance.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Unusual procedural services, increased procedural services | Use when the work required is substantially greater than typically required for 0524T (document rationale and operative report). |
23 | Unusual anesthesia (non‑OR/remote anesthesia) | Use when medically necessary anesthesia is administered that is not typical for this ambulatory endovenous chemical ablation. |
50 | Bilateral procedure | Use when identical chemical ablation is performed on contralateral limbs during the same session (if payer allows; verify bundling rules). |
51 | Multiple procedures | Use when 0524T is reported with additional distinct procedures during the same session that are separately reportable per payer policy. |
52 | Reduced services | Use when the planned chemical ablation is partially reduced or not completed as documented. |
53 | Discontinued procedure | Use when the procedure is started but terminated due to patient condition or unforeseen complications before completion. |
62 | Two surgeons | Use when two surgeons of different specialties work together as primary surgeons throughout the procedure. |
78 | Unplanned return to the OR/procedure following initial procedure for related procedure during global period | Use when the patient requires an unplanned reintervention related to the initial chemical ablation during the global period. |
79 | (Not in provided list) | Data not available in the input. |
AS | Medicare Ambulatory Surgical Center (ASC) payment indicator | Use when reporting facility status or ASCs require identification of ambulatory surgical setting for claims where applicable. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207RG0100X | Vascular Surgery | Vascular surgeons frequently perform endovenous and chemical ablation of varicose veins. |
| 2080P0005X | Interventional Cardiology | Interventionalists with peripheral venous expertise may perform image-guided venous procedures. |
| 207K00000X | General Surgery | General surgeons with endovascular training may perform venous ablation procedures. |
| 208100000X | Radiology (Diagnostic) | Diagnostic radiologists or interventional radiologists perform image-guided venous interventions. |
| 354E00000X | Podiatry | Podiatrists with advanced training may perform procedures on lower-extremity veins in select practices. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
I83.011 | Varicose veins of right lower extremity with ulcer of thigh | Identifies symptomatic varicose disease with complication; indicates need for definitive venous treatment such as chemical ablation. |
I83.012 | Varicose veins of left lower extremity with ulcer of thigh | As above for left limb; supports need for targeted vein ablation. |
I83.10 | Varicose veins of unspecified lower extremity with pain | Captures symptomatic varicose veins when laterality not specified; aligns with procedural indication. |
I83.219 | Varicose veins of unspecified lower extremity with inflammation | Documents inflamed varicosities that may be treated with endovenous techniques. |
I87.2 | Venous insufficiency (chronic) (peripheral) | Underlying chronic venous insufficiency commonly addressed by ablation of refluxing superficial veins. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
36475 | Endovenous ablation therapy of incompetent vein, extremity, by radiofrequency device (thermal), percutaneous, includes endovenous catheter placement, tumescent anesthesia, guidance and monitoring | Alternative endovenous ablation technique (thermal) that may be selected instead of chemical ablation; used in comparative coding and treatment planning. |
36476 | Endovenous ablation therapy of incompetent vein, extremity, by laser, percutaneous, includes endovenous catheter placement, tumescent anesthesia, guidance and monitoring | Alternative thermal ablation (laser) technique used for similar clinical indications; may be performed in separate sessions or as an alternative. |
36482 | Endovenous ablation of incompetent vein, extremity, by percutaneous collagen or other non-thermal, non-chemical method (example), includes catheter placement, guidance, and monitoring | Represents other non-thermal, non-chemical ablation modalities that can be part of the procedural options for venous incompetence. |
93970 | Duplex scan of extremity veins including responses to compression and other maneuvers; complete bilateral study | Pre- or post-procedural diagnostic mapping and surveillance ultrasound commonly used to plan and confirm occlusion after 0524T. |
36465 | Injection of sclerosant; single vein | Adjunctive manual sclerotherapy for residual varicosities in the office setting; may be used before or after the primary 0524T procedure for tributary veins. |