CPT 35570 Tibial/Peroneal Bypass Reimbursement | OpenPayer

Summary & Overview

CPT 35570: Tibial and Peroneal Artery Bypass Procedures

CPT code 35570 denotes open surgical bypass procedures of the lower leg arteries—specifically tibial-to-tibial, peroneal-to-tibial, or tibial-peroneal trunk-to-tibial bypasses—using a harvested graft or the patient’s own vein. These procedures restore distal perfusion when the tibial, peroneal, or tibioperoneal trunk artery is obstructed or damaged and are clinically important for limb salvage and management of critical limb ischemia. Nationally, this code represents a key vascular surgery intervention with implications for hospital surgical volume, specialty vascular practices, and payer coverage policies.

Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context, common sites of service, and payer coverage patterns where available. The publication summarizes benchmark metrics, typical billing considerations, and recent policy updates affecting surgical vascular reimbursement and authorization practices. It also outlines where data is available and where input was not provided.

Data not available in the input: Associated taxonomies, ICD-10 diagnoses, related codes, and detailed payer-specific reimbursement rates. The content focuses on clinical definition, service setting, and the national relevance of CPT code 35570 for vascular surgery and limb preservation care.

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Billing Code Overview

CPT code 35570 describes a surgical bypass of tibial or peroneal arteries using a harvested graft or autogenous vein. The procedure covers creation of a tibial-to-tibial artery bypass, a peroneal-to-tibial artery bypass, or a tibial-peroneal trunk-to-tibial artery bypass to circumvent a damaged or obstructed segment of the tibial, peroneal, or tibioperoneal trunk artery.

Service type: Surgical arterial bypass of the lower extremity
Typical site of service: Hospital operating room or major ambulatory surgical center

Clinical & Coding Specifications

Clinical Context

A 68-year-old patient with long-standing peripheral arterial disease and a nonhealing ischemic ulcer on the lateral aspect of the lower leg is evaluated for revascularization. Noninvasive testing (ankle-brachial index, segmental pressures, duplex ultrasound) demonstrates significant tibial artery occlusive disease with inadequate inline flow to the foot. Angiography confirms a chronic occlusion of the distal tibial artery with patent proximal inflow. The vascular surgeon plans an open lower-extremity bypass using the patient’s reversed autologous saphenous vein to create a tibial-to-tibial or peroneal-to-tibial bypass to restore perfusion and salvage the limb. The procedure is performed in an operating room under general or regional anesthesia; intraoperative steps include exposure of target tibial and peroneal vessels, harvest and preparation of the autologous vein graft, systemic heparinization, proximal and distal anastomoses to the tibial or peroneal targets, assessment of conduit flow, and wound closure. Postoperative management includes limb perfusion monitoring, anticoagulation as indicated, wound care for the ulcer, and vascular follow-up with duplex surveillance.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the procedure requires substantially greater work, time, or complexity than typical.

CPT 35516: Subclavian-to-Axillary Vein Bypass

CPT-35538-AORTO-ILIAC-VEIN-BYPASS

CPT 35538: Aorto-Iliac Bypass with Vein Graft

CPT-35537-AORTO-ILIAC-BYPASS-VEIN-GRAFT

CPT 35537: Aorto‑iliac Bypass with Vein Graft

CPT-35571-POPLITEAL-TO-TIBIAL-PERONEAL-BYPASS

CPT 35571: Popliteal to Tibial/Peroneal Arterial Bypass

CPT-35525-BRACHIAL-ARTERY-BRACHIAL-ARTERY-VEIN-BYPASS-GRAFT

CPT 35525: Brachial Artery-to-Brachial Artery Vein Bypass

CPT-35536-SPLENIC-TO-RENAL-ARTERY-BYPASS-VEIN-GRAFT

CPT 35536: Splenic-to-Renal Artery Bypass with Vein Graft

CPT-35539-AORTO-FEMORAL-VEIN-BYPASS-GRAFT

CPT 35539: Aorto-Femoral Vein Bypass Graft

CPT-35500-ARM-VEIN-HARVEST-FOR-BYPASS-CONDUIT

CPT 35500: Upper-Extremity Vein Harvest for Bypass Conduit

CPT-35558-FEMORAL-FEMORAL-VEIN-BYPASS

CPT 35558: Femoral–Femoral Bypass with Vein Graft

CPT-35560-RENAL-ARTERY-BYPASS-VEIN-GRAFT

CPT 35560: Aorta-to-Renal Artery Bypass Using Vein Graft

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Taxonomy Code	Specialty	Notes
207K00000X	Vascular Surgery	Primary specialty performing open tibial/peroneal bypass grafting.
207L00000X	Thoracic and Cardiovascular Surgery	Often performs complex peripheral bypass procedures in some centers.
2070P0000X	Surgery - General	General surgeons with vascular training may perform lower-extremity bypass in some settings.
2080S0010X	Interventional Cardiology	Not typically primary for open bypass but may coordinate endovascular-to-open hybrid care.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I70.213`	Atherosclerosis of native arteries of the extremities, bilateral legs, with intermittent claudication	Common cause of tibial artery occlusive disease leading to bypass when lifestyle-limiting or limb-threatening ischemia is present.
`I70.224`	Atherosclerosis of native arteries of extremities, left leg, with rest pain	Rest pain indicates critical limb ischemia prompting distal bypass to restore perfusion.
`I70.231`	Atherosclerosis of native arteries of the extremities with ulceration, right leg	Ischemic ulceration is a frequent indication for tibial/peroneal bypass to achieve wound healing.
`I74.3`	Embolism and thrombosis of arteries of lower extremities	Acute or subacute arterial occlusion may necessitate bypass if thromboembolectomy or endovascular therapy is insufficient.
`I70.235`	Atherosclerosis of native arteries of the extremities with gangrene, right leg	Gangrene represents limb-threatening ischemia where distal bypass is a limb salvage procedure.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`35646`	Bypass graft, femoral-popliteal, single or sequential; with vein only	Performed when more proximal femoropopliteal inflow reconstruction is required prior to tibial bypass or as alternative conduit planning.
`35800`	Revision and repair of vascular prosthetic graft; extraperitoneal, major vessel	Used when revision of an existing bypass graft or conduit is necessary during the same admission.
`36415`	Collection of venous blood by venipuncture	Common preoperative laboratory draw for coagulation and baseline testing.
`35556`	Thromboendarterectomy, tibial, peroneal or tibioperoneal trunk	Performed for open surgical removal of plaque in tibial/peroneal arteries and may be adjunct or alternative to bypass.
`35866`	Harvest of saphenous vein, open, including incision for separate harvest site	Often performed as the conduit harvest procedure when autologous vein is used for the bypass.

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