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CPT 35685: Distal Synthetic Patch/Cuff for Bypass Graft

CPT code 35685 represents an add–on vascular surgical procedure in which a synthetic patch or cuff is placed at the distal site of a synthetic bypass graft at the time of graft insertion to improve conduit quality and distal anastomotic patency. This procedure is clinically significant for vascular surgeons managing peripheral bypasses and has implications for procedural coding, hospital operating-room resource use, and postoperative outcomes related to graft durability.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. Readers will find a concise overview of the clinical purpose of the service, the typical surgical setting where it is performed, and the common modifiers associated with billing for the add–on procedure. The publication also outlines what to expect in payer coverage and coding practice: benchmarks for utilization of add–on graft augmentation, relevant coding considerations for inclusion on the surgical claim, and how the procedure is documented in the operative record.

The analysis provides clinical context useful to coding professionals, hospital billing teams, and vascular surgery clinicians: why the add–on cuff or patch is used, how it complements a primary bypass graft, and the administrative elements affecting reimbursement and claim adjudication. Data not available in the input will be identified where applicable.

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Billing Code Overview

CPT code 35685 describes an add–on surgical procedure in which the provider places a synthetic patch or cuff at the distal site of a synthetic bypass graft at the same time the bypass graft is placed. The service is intended to provide a better conduit and improve patency at the distal bypass anastomosis site.

Service type: Surgical add-on procedure to augment a synthetic bypass graft
Typical site of service: Operating room or other surgical suite during vascular bypass graft placement

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CPT 35685: Distal Synthetic Patch/Cuff for Bypass Graft

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Billing Code Overview

Service type: Surgical add-on procedure to augment a synthetic bypass graft
Typical site of service: Operating room or other surgical suite during vascular bypass graft placement

Clinical & Coding Specifications

Clinical Context

A typical patient is an older adult with symptomatic peripheral arterial disease undergoing lower extremity arterial bypass for critical limb ischemia or lifestyle-limiting claudication. The vascular surgeon, often in an operating room or hybrid endovascular suite, performs placement of a synthetic bypass graft (for example, femoropopliteal or femorodistal bypass). At the time of graft placement, the surgeon performs the add-on procedure to place a synthetic patch or cuff at the distal anastomosis to improve distal conduit geometry and patency. The workflow includes preoperative assessment with arterial imaging (duplex ultrasound, CT angiography or digital subtraction angiography), intraoperative anticoagulation and heparinization, exposure of the target artery, creation of the distal anastomosis, placement and fixation of the synthetic patch or cuff, hemostasis, and postoperative monitoring in the post-anesthesia care unit with vascular checks and anticoagulation management as indicated.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier — standard coding	Use when no additional reporting modifiers apply and billing is routine.
`11`	Decision for surgery	Use when this is the initial, authorized surgical service and no unrelated services are performed.
`22`	Increased procedural services	Use to report significantly greater than typical work for an unusual degree of difficulty for the add-on placement.
`52`	Reduced services	Use when the graft or cuff placement is partially reduced or not completed as originally planned.
`53`	Discontinued procedure	Use if the procedure was started but terminated due to extenuating circumstances prior to placement.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing separate, distinct portions of the bypass and cuff placement.
`66`	Surgical team	Use when services are reported by a surgical team under established team reporting policies.
`78`	Return to OR for related procedure during global period	Use when a related reoperation on the same site is required during the postoperative global period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use when an unrelated procedure is performed by the same physician during the global period.
`LT`	Left side	Use to identify procedures performed on the left extremity when side-specific reporting is required.
`QK`	Medical direction of two, three, or four concurrent anesthesia procedures	Applicable when anesthesia direction meets criteria for concurrent cases.
`QX`	Modifier for CRNA when services meet requirements for physician medical direction	Use when a CRNA furnishes anesthesia under physician direction that qualifies for modifier reporting.
`QY`	Medical direction of one certified registered nurse anesthetist (CRNA) by an anesthesiologist	Use when anesthesiologist medically directs the CRNA for this case.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when an approved advanced practice clinician serves as surgeon assistant.

Taxonomy Code	Specialty	Notes
207RX0400X	Vascular Surgery	Primary specialty performing synthetic bypass grafting and distal patch/cuff placement.
207L00000X	General Surgery	General surgeons with vascular training who perform peripheral bypass procedures.
207RH0000X	Thoracic and Cardiovascular Surgery	Surgeons trained in peripheral vascular procedures and complex limb revascularization.
363LF0000X	Interventional Cardiology	May be involved in hybrid cases with endovascular and open components.
208000000X	Family Medicine (Wound care/assistant)	Occasional involvement as assistant or perioperative care in certain settings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I70.2`	Atherosclerosis of native arteries of the extremities	Primary disease process causing critical limb ischemia or claudication leading to bypass and distal cuff placement.
`I70.23`	Atherosclerosis of native arteries of the extremities with gangrene	Indicates severe ischemia often necessitating distal bypass to salvage limb; patch/cuff used to optimize patency.
`I70.21`	Atherosclerosis of native arteries of the extremities with intermittent claudication	Symptomatic arterial occlusive disease where bypass may be indicated to improve function.
`I74.3`	Embolism and thrombosis of arteries of lower extremities	Acute or subacute arterial occlusion requiring bypass grafting; distal cuff may be used to improve anastomotic flow.
`I96`	Gangrene, not elsewhere classified	Severe limb ischemia complication prompting revascularization procedures including bypass with distal cuff.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`35566`	Endarterectomy, femoral artery, with patch graft	May be performed proximal or in combination when native artery disease requires endarterectomy and patching during limb revascularization.
`35656`	Bypass graft, with vein; femoral-popliteal, above knee, single segment	Alternative conduit choice; performed when autogenous vein bypass is used instead of synthetic graft.
`35666`	Bypass graft, with other than vein; femoral-popliteal, above knee, using prosthetic material	Core bypass graft codes describing placement of a synthetic graft to which the distal patch/cuff (`35685`) is added.
`35820`	Insertion of intravascular stent(s), open or percutaneous, lower extremity, with angioplasty when performed; initial vessel	May be performed in hybrid procedures addressing inflow or outflow lesions in conjunction with bypass and cuff placement.
`36011`	Introduction of needle or catheter, including imaging guidance; for diagnostic angiography or conduit access	Used for intraoperative angiography or access to guide distal anastomosis assessment or completion angiogram.

CPT 35686: Creation of Arteriovenous Fistula During Lower Extremity Bypass

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier — standard coding	Use when no additional reporting modifiers apply and billing is routine.
`11`	Decision for surgery	Use when this is the initial, authorized surgical service and no unrelated services are performed.
`22`	Increased procedural services	Use to report significantly greater than typical work for an unusual degree of difficulty for the add-on placement.
`52`	Reduced services	Use when the graft or cuff placement is partially reduced or not completed as originally planned.
`53`	Discontinued procedure	Use if the procedure was started but terminated due to extenuating circumstances prior to placement.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing separate, distinct portions of the bypass and cuff placement.
`66`	Surgical team	Use when services are reported by a surgical team under established team reporting policies.
`78`	Return to OR for related procedure during global period	Use when a related reoperation on the same site is required during the postoperative global period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use when an unrelated procedure is performed by the same physician during the global period.
`LT`	Left side	Use to identify procedures performed on the left extremity when side-specific reporting is required.
`QK`	Medical direction of two, three, or four concurrent anesthesia procedures	Applicable when anesthesia direction meets criteria for concurrent cases.
`QX`	Modifier for CRNA when services meet requirements for physician medical direction	Use when a CRNA furnishes anesthesia under physician direction that qualifies for modifier reporting.
`QY`	Medical direction of one certified registered nurse anesthetist (CRNA) by an anesthesiologist	Use when anesthesiologist medically directs the CRNA for this case.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when an approved advanced practice clinician serves as surgeon assistant.

Taxonomy Code	Specialty	Notes
207RX0400X	Vascular Surgery	Primary specialty performing synthetic bypass grafting and distal patch/cuff placement.
207L00000X	General Surgery	General surgeons with vascular training who perform peripheral bypass procedures.
207RH0000X	Thoracic and Cardiovascular Surgery	Surgeons trained in peripheral vascular procedures and complex limb revascularization.
363LF0000X	Interventional Cardiology	May be involved in hybrid cases with endovascular and open components.
208000000X	Family Medicine (Wound care/assistant)	Occasional involvement as assistant or perioperative care in certain settings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I70.2`	Atherosclerosis of native arteries of the extremities	Primary disease process causing critical limb ischemia or claudication leading to bypass and distal cuff placement.
`I70.23`	Atherosclerosis of native arteries of the extremities with gangrene	Indicates severe ischemia often necessitating distal bypass to salvage limb; patch/cuff used to optimize patency.
`I70.21`	Atherosclerosis of native arteries of the extremities with intermittent claudication	Symptomatic arterial occlusive disease where bypass may be indicated to improve function.
`I74.3`	Embolism and thrombosis of arteries of lower extremities	Acute or subacute arterial occlusion requiring bypass grafting; distal cuff may be used to improve anastomotic flow.
`I96`	Gangrene, not elsewhere classified	Severe limb ischemia complication prompting revascularization procedures including bypass with distal cuff.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`35566`	Endarterectomy, femoral artery, with patch graft	May be performed proximal or in combination when native artery disease requires endarterectomy and patching during limb revascularization.
`35656`	Bypass graft, with vein; femoral-popliteal, above knee, single segment	Alternative conduit choice; performed when autogenous vein bypass is used instead of synthetic graft.
`35666`	Bypass graft, with other than vein; femoral-popliteal, above knee, using prosthetic material	Core bypass graft codes describing placement of a synthetic graft to which the distal patch/cuff (`35685`) is added.
`35820`	Insertion of intravascular stent(s), open or percutaneous, lower extremity, with angioplasty when performed; initial vessel	May be performed in hybrid procedures addressing inflow or outflow lesions in conjunction with bypass and cuff placement.
`36011`	Introduction of needle or catheter, including imaging guidance; for diagnostic angiography or conduit access	Used for intraoperative angiography or access to guide distal anastomosis assessment or completion angiogram.

CPT 35686: Creation of Arteriovenous Fistula During Lower Extremity Bypass

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

OpenPayer

CPT 35685: Distal Synthetic Patch/Cuff for Bypass Graft

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Billing Code Overview

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CPT 35685: Distal Synthetic Patch/Cuff for Bypass Graft

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References