CPT 36473 MOCA Reimbursement & Policy | OpenPayer

Summary & Overview

CPT 36473: Image-Guided Mechanochemical Ablation for Varicose Vein, First Vein

Headline: CPT code 36473 Defines Image-Guided Mechanochemical Ablation for Varicose Veins

Lead: CPT code 36473 covers percutaneous, image-guided mechanochemical ablation (MOCA) of an extremity vein, reported for the treatment of the first vein treated. The code captures a minimally invasive endovenous approach that combines mechanical disruption with chemical ablation to treat incompetent saphenous and other superficial veins.

CPT code 36473 matters nationally because MOCA represents a growing alternative to thermal ablation and surgical stripping for symptomatic varicose veins, influencing outpatient procedural volumes and payer coverage policies. Major payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will learn the clinical context of the procedure, the typical sites of service, and what this code represents for coding and billing workflows. The publication summarizes national benchmarks and reimbursement patterns where available, outlines common payer coverage considerations, and highlights relevant clinical and policy developments affecting utilization of mechanochemical ablation. Data not available in the input will be noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare36473CPTmechanochemical ablationMOCAvaricose veinsendovenous procedurevascular surgeryoutpatient

Billing Code Overview

CPT code 36473 describes percutaneous mechanochemical ablation (MOCA) performed under imaging guidance and monitoring to destroy the intimal lining of a vein in an extremity for treatment of incompetent (varicose) veins. The code is reported for the treatment of the first vein using a specially designed MOCA device inserted through a catheter placed through the skin.

Service type: Image-guided percutaneous mechanochemical ablation (endovenous venous ablation)
Typical site of service: Outpatient vascular procedure setting or ambulatory surgery center; may also be performed in hospital outpatient departments.

Clinical & Coding Specifications

Clinical Context

A 56-year-old ambulatory patient presents to an outpatient vascular clinic with symptomatic varicose veins of the right great saphenous vein characterized by aching, swelling, and visible tributary veins. Duplex ultrasound confirms reflux of the great saphenous vein. The provider obtains informed consent and schedules an image-guided mechanochemical ablation (MOCA) session. On the day of service the patient arrives to an ambulatory surgical center. Under ultrasound guidance, local tumescent anesthesia is administered percutaneously, a catheter is inserted into the target saphenous vein, and a commercially available MOCA device is advanced to the treatment segment. The device mechanically disrupts the endothelium while a sclerosant is delivered, resulting in chemical and mechanical ablation of the incompetent vein. Post-procedure duplex ultrasound confirms closure of the treated segment; the patient is discharged with compression stockings and follow-up arranged in 1–2 weeks.

Coding Specifications

Modifier	Description	When to Use
`00`	Standard primary or default service indicator	Rarely used explicitly; indicates standard service when payer requires a two-character code for reporting primary service.
`11`

CPT 36478: Endovenous Laser Ablation of First Diseased Vein

CPT-36475-ENDOVENOUS-RADIOFREQUENCY-ABLATION-VEIN-DESTRUCTION-EXTREMITY

CPT 36475: Endovenous Radiofrequency Ablation of Extremity Vein

CPT-36476-ENDOVENOUS-RADIOFREQUENCY-ABLATION-ADD-ON

CPT 36476: Endovenous Radiofrequency Ablation, Additional Vein

CPT-36474-MECHANOCHEMICAL-ABLATION-ADDITIONAL-VARICOSE-VEIN

CPT 36474: Mechanochemical Ablation of Additional Incompetent Vein(s)

CPT-36483-ADD-ON-CHEMICAL-ADHESIVE-ABLATION-EXTREMITY

CPT 36483: Add-On Chemical Adhesive Ablation of Subsequent Extremity Veins

CPT-36479-ENDOVENOUS-LASER-ABLATION-ADD-ON-PROCEDURE

CPT 36479: Endovenous Laser Ablation, Additional Vein

Taxonomy Code	Specialty	Notes
207R00000X	Vascular Surgery	Common specialty performing endovenous and mechanochemical ablation procedures.
2080P0003X	Interventional Cardiology	Interventionalists who perform peripheral venous interventions in some settings.
2086S0122X	Phlebology	Specialists focused on venous disease and minimally invasive venous procedures.
207K00000X	General Surgery	General surgeons with vascular or endovascular expertise who perform venous ablation.
222100000X	Physician Assistant	Frequently assist in perioperative care and may perform parts of the procedure under supervision per state law.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I83.011`	Varicose veins of right lower extremity with ulcer of thigh	Advanced varicose disease with ulceration indicating venous incompetence amenable to ablation therapy of involved trunks.
`I83.012`	Varicose veins of left lower extremity with ulcer of thigh	Same as above for the left side; guides laterality and severity for treatment planning.
`I83.20`	Varicose veins of unspecified lower extremity with pain	Symptomatic varicose veins where MOCA addresses the underlying reflux causing pain.
`I83.819`	Varicose veins of unspecified lower extremity with other complications	Captures varicose veins with complications (e.g., edema, inflammation) relevant to procedural indication.
`I87.2`	Venous insufficiency (chronic) (peripheral)	Chronic venous insufficiency is the pathophysiologic indication for endovenous ablation procedures.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`36473`	Under imaging guidance and monitoring, insertion of mechanochemical ablation (MOCA) device; report for treatment of the first vein.	Primary code for percutaneous MOCA of the first treated vein.
`36474`	Under imaging guidance and monitoring, insertion of mechanochemical ablation (MOCA) device; each additional vein, when reported separately as an add-on.	Use when additional separate veins are treated during the same session (add-on to `36473`).
`76881`	Ultrasound, extremity, nonvascular, real-time with image documentation, complete.	May be used for pre- or post-procedure extremity ultrasound when documented as a separate service.
`93970`	Duplex scan of extremity veins including responses to compression and other provocative maneuvers; complete bilateral study.	Pre-procedure venous mapping and reflux assessment; diagnostic confirmation prior to MOCA.
`36478`	Endovenous ablation therapy of incompetent vein, extremity, by catheter-based chemical ablation; first vein treated.	Alternative endovenous ablation technique (chemical) that may be performed instead of MOCA; relevant for coding comparisons.

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