Summary & Overview
CPT 36474: Mechanochemical Ablation of Additional Incompetent Vein(s)
CPT code 36474 identifies percutaneous mechanochemical ablation (MOCA) of an additional incompetent extremity vein performed under imaging guidance and monitoring. The code is reported in addition to the primary MOCA code when treating one or more additional varicose veins via a separate percutaneous access. Nationally, this code matters as endovenous ablation techniques have grown as minimally invasive alternatives to open venous surgery, affecting utilization, coverage policy, and outpatient procedural workflows.
Key payers considered include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical intent and typical service setting, a summary of common modifiers and billing contexts, and guidance on where to look for payer-specific coverage language. The publication also summarizes benchmarking considerations for code reporting frequency and bundling with primary venous ablation codes, notes common claim modifiers used with procedural add-on reporting, and outlines clinical context for use: targeted treatment of additional incompetent superficial veins in extremities when imaging-guided endovenous MOCA is performed.
Data not available in the input: associated taxonomies, specific ICD-10 diagnoses, related CPT codes beyond the provided code, and payer-specific reimbursement rates. The content is intended for a national audience seeking clarity on clinical billing intent and common billing practice elements for CPT code 36474.
Billing Code Overview
CPT code 36474 describes a percutaneous mechanochemical ablation (MOCA) procedure performed under imaging guidance and monitoring to ablate the intimal lining of an additional incompetent extremity vein. The service involves insertion of a specially designed MOCA device through a catheter placed via a separate skin access site and destruction of the vein lining to treat additional varicose veins.
Service Type: Endovenous mechanochemical ablation (MOCA)
Typical Site of Service: Outpatient vascular procedure setting or ambulatory surgical center, performed under imaging guidance (for example, ultrasound) with monitoring.
Clinical & Coding Specifications
Clinical Context
A 56-year-old ambulatory patient presents to the vascular clinic with symptomatic varicose veins of the lower extremity, reporting aching, swelling, and visible bulging veins refractory to conservative therapy (compression stockings and activity modification). Duplex ultrasound confirms an incompetent great saphenous vein and one or more additional incompetent tributary or accessory superficial veins. The interventional vascular specialist performs endovenous mechanochemical ablation under ultrasound imaging guidance. The primary planned treatment is 36473 (mechanochemical ablation of the primary incompetent vein); during the same encounter, the provider percutaneously inserts a separate access and advances a specially designed MOCA device to treat additional incompetent vein(s), reporting 36474 in addition to the primary code. The procedure is typically performed in an outpatient vascular lab, ambulatory surgery center, or hospital outpatient department under local anesthesia with or without moderate sedation. Intra-procedural ultrasound monitoring documents catheter position and closure of treated segments. Post-procedure, the patient is observed for hemostasis and venous thrombosis signs, receives compression instructions, and has a follow-up duplex ultrasound scheduled within 1–4 weeks to confirm closure and assess for additional treatment needs. Payors commonly involved in coverage and claims adjudication include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|