Summary & Overview
CPT 37765: Ambulatory Microphlebectomy for Varicose Veins
CPT code 37765 represents ambulatory microphlebectomy — the excision and removal of varicose veins through 10 to 20 very small incisions. Nationally, this procedure matters because it is a common minimally invasive surgical option for symptomatic superficial varicosities and influences outpatient surgical utilization, device and supply use, and post-procedure follow-up patterns.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for the procedure, common settings where it is performed, and what to expect in billing practice for claims that report this code. The publication summarizes national benchmarks for utilization and site-of-service distribution where available, highlights payer coverage patterns and prior authorization considerations generally applied to varicose vein procedures, and outlines coding relationships relevant to procedure bundling and global periods.
This resource is aimed at revenue cycle leaders, providers, and policy analysts seeking a concise reference to CPT code 37765, offering clinical framing, payer coverage scope, and operational factors affecting submission and adjudication.
Billing Code Overview
CPT code 37765 describes a surgical procedure in which the provider excises and removes varicose veins through 10 to 20 very small incisions. This is a form of phlebectomy or ambulatory microphlebectomy performed to remove superficial varicosities.
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Service type: Surgical excision and removal of varicose veins (ambulatory microphlebectomy)
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Typical site of service: Outpatient surgical setting, ambulatory surgery center, or hospital outpatient department
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Clinical & Coding Specifications
Clinical Context
A typical patient is a 45–65-year-old ambulatory adult presenting with symptomatic varicose veins of the lower extremity characterized by aching, swelling, heaviness, skin irritation, or recurrent superficial thrombophlebitis. Initial evaluation includes history, physical exam with vein mapping, and duplex ultrasound to identify saphenous reflux and tributary varicosities. Conservative measures (compression stockings, leg elevation, activity modification) are often attempted first. When symptoms persist or complications occur, a vascular surgeon, interventional radiologist, or vein specialist schedules a procedure for phlebectomy.
The clinical workflow: preoperative assessment and informed consent; marking of target veins with the patient standing; tumescent local anesthesia is infiltrated along the course of the veins; multiple small stab incisions are made; long-handled hooks are used to extract segments of varicose veins (10–20 small incisions as described); hemostasis, sterile dressing, and compression bandaging are applied. The procedure commonly occurs in an ambulatory surgical center or outpatient clinic procedure room. Postoperative care instructions include compression stocking use, limited activity for 24–48 hours, and follow-up for wound checks and duplex ultrasound if indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work required is substantially greater than typical for this procedure (document increased complexity). |