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CPT 35703: Exploratory Lower-Extremity Arterial Procedure Without Repair

CPT code 35703 represents a diagnostic exploration of a previously operated lower-extremity arterial site to evaluate for postoperative injury, clot, leaking vessels, or other vascular abnormalities without proceeding to surgical repair. This procedure targets major lower-extremity arteries — including the common femoral, deep femoral, superficial femoral, popliteal, tibial, and peroneal arteries — and is clinically important for identifying complications that may require subsequent intervention. Nationally, accurate coding for this exploratory service affects postoperative surveillance, quality measurement, and appropriate payment for diagnostic surgical work.

Key payers referenced in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context and service characteristics, guidance on common billing considerations, and a summary of payer coverage patterns and benchmarks where available. The publication also highlights relevant coding relationships, typical sites of service, and how this diagnostic exploration differs from procedures that include definitive repair. Data not available in the input are noted where applicable.

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Billing Code Overview

CPT code 35703 describes an exploratory procedure of a previously operated lower-extremity arterial site to determine whether postoperative injury, thrombosis, bleeding from vessels, or other vascular abnormalities are present. The exploration examines arteries such as the common femoral, deep femoral, superficial femoral, popliteal, tibial, and peroneal arteries and is performed without surgical repair.

Service type: Surgical exploration of previously operated lower-extremity arterial site (diagnostic exploration without repair)
Typical site of service: Operating room or procedure suite for lower-extremity vascular exploration; may occur in inpatient or outpatient surgical settings depending on clinical context

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CPT 35703: Exploratory Lower-Extremity Arterial Procedure Without Repair

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Billing Code Overview

Service type: Surgical exploration of previously operated lower-extremity arterial site (diagnostic exploration without repair)
Typical site of service: Operating room or procedure suite for lower-extremity vascular exploration; may occur in inpatient or outpatient surgical settings depending on clinical context

Clinical & Coding Specifications

Clinical Context

A typical patient is a 62-year-old male with prior femoral-popliteal bypass surgery who presents with acute-onset worsening claudication, increasing leg pain, localized swelling, or signs suggestive of postoperative vascular complication (bleeding, hematoma, or compromised distal pulses). The vascular surgeon evaluates the limb in the operating room under regional or general anesthesia to explore a previously operated area of the lower extremity (common femoral, deep femoral, superficial femoral, popliteal, tibial, or peroneal arteries) to determine whether there is postoperative injury, hemorrhage, thrombosis, or other vascular abnormality. Intraoperative steps include surgical exposure of the prior incision, careful dissection through scar tissue, identification of vessel integrity, assessment for active bleeding or thrombosis, and possible collection of intraoperative imaging or blood samples. No definitive vascular repair, graft revision, thrombectomy, or arterial reconstruction is performed during this exploration. The procedural documentation should describe the prior operative site, findings (no repair performed), reason for exploration, anesthesia type, operative time, and perioperative condition of the limb. Typical sites of service are the hospital operating room or ambulatory surgical center for postoperative wound/vascular assessments in the lower extremity.

Coding Specifications

Modifier	Description	When to Use
`11`	Normal or routine service	Use when this procedure represents the usual, unremarkable service provided.
`22`	Increased procedural services	Use when the exploration required substantially greater work than typical due to dense scar, extensive dissection, or prolonged operative time.
`23`	Unusual anesthesia	Use when general anesthesia is required for a procedure that is usually performed with local/regional anesthesia.
`52`	Reduced services	Use when the exploration was intentionally less than described in the code (limited exploration).
`53`	Discontinued procedure	Use when exploration was started but discontinued due to patient instability or intraoperative findings preventing completion.
`59`	Distinct procedural service	Use when a separately identifiable exploration is performed at a distinct anatomical site or on a different artery during the same operative session.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons during the exploration.
`66`	Surgical team	Use when a surgical team (multiple qualified surgeons) provided the service.
`76`* Not listed in provided modifiers; omitted
`78`	Unplanned return to the operating room	Use when the exploration is an unplanned return to the OR for a postoperative complication.
`80`	Assistant surgeon	Use when an assistant surgeon performed part of the procedure.
`81`	Minimum assistant surgeon	Use when a minimal assistant role was provided.
`82`	Assistant surgeon (qualified resident)	Use when a qualified resident provided assistant surgeon services without an attending.
`LT`	Left side	Use to identify the procedure performed on the left lower extremity.
`RT`	Right side	Use to identify the procedure performed on the right lower extremity.

Taxonomy Code	Specialty	Notes
`2080S00000X`	Vascular Surgery	Surgeons who most commonly perform lower extremity arterial explorations.
`207K00000X`	Cardiovascular Thoracic Surgery	Surgeons involved when complex vascular reconstructions are anticipated.
`207L00000X`	Surgery - General	General surgeons in some settings perform lower extremity explorations.
`207RG0100X`	Interventional Cardiology	May be involved for endovascular assessment but less commonly for open explorations.
`363L00000X`	Emergency Medicine	Emergency physicians may identify the need for urgent exploration and facilitate transfer.

*Note: Only modifiers listed in the provided input were considered; 76 was not in the provided list and is therefore not used here.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I80.2`	Phlebitis and thrombophlebitis of other deep vessels of lower extremities	Deep venous thrombosis or thrombophlebitis may be evaluated or excluded during exploration of postoperative lower extremity sites.
`I74.3`	Embolism and thrombosis of arteries of lower extremities	Acute arterial occlusion potentially identified during exploration when sudden ischemia occurs.
`I97.1`	Postprocedural disorders of circulation, not elsewhere classified	General code for postoperative vascular complications discovered on exploration.
`T81.0XXA`	Hemorrhage and hematoma complicating a procedure, initial encounter	Exploration is commonly performed to evaluate postoperative bleeding or hematoma at the surgical site.
`I70.213`	Atherosclerosis of autologous vein bypass graft of the right leg with intermittent claudication	Patients with prior bypass grafts may undergo exploration for graft-related complications.
`T82.8XXA`	Other complications of vascular prosthetic devices, implants and grafts, initial encounter	Exploration may assess graft leaks, graft failure, or infection without definitive repair.
`L97.423`	Non-pressure chronic ulcer of left heel and midfoot with fat layer exposed	Chronic ischemic ulcers may prompt exploration of prior bypass or arterial surgery sites when limb perfusion is assessed.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`35703`	Exploration of previously operated area, lower extremity, without repair	Principal procedure described: exploration to evaluate for postoperative injury, clot, or bleeding without performing repair.
`35831`	Revision, vascular access (e.g., arteriovenous fistula, graft); upper or lower extremity	May be performed if exploration reveals need for access revision; represents a potential subsequent repair procedure.
`34201`	Thrombectomy, embolectomy, with or without endarterectomy, femoral or popliteal artery; without bypass	Performed when exploration identifies thrombus requiring removal; would be billed if definitive thrombectomy is performed.
`34701`	Repair of vessel (artery), direct; femoral artery	Represents arterial repair that could follow exploration if a repair is undertaken.
`35566`	Open treatment of popliteal artery aneurysm, with or without graft	Example of a definitive vascular procedure that might follow diagnostic exploration if an aneurysm or major lesion is identified.

CPT 35700: Reoperation on Arterial Bypass Graft

CPT-35701-NECK-ARTERY-EXPLORATION-SCAR-TISSUE-REMOVAL

CPT 35701: Neck Artery Exploration and Scar Tissue Removal

CPT-35702-UPPER-EXTREMITY-VASCULAR-EXPLORATION-NO-REPAIR

CPT 35702: Upper Extremity Vascular Exploration, No Repair

CPT-35800-NECK-WOUND-EXPLORATION-CONTROL-BLEEDING-INFECTION

CPT 35800: Neck Exploration for Bleeding, Clot, or Infection

CPT-35820-REOPEN-CHEST-TO-CONTROL-BLEEDING-CLOTTING-INFECTION

CPT 35820: Reopen Chest to Control Bleeding, Clotting, or Infection

CPT-35840-ABDOMINAL-RE-EXPLORATION-FOR-BLEEDING-OR-INFECTION

CPT 35840: Abdominal Re-exploration for Bleeding or Infection

CPT-35860-EXTREMITY-RE-EXPLORATION-FOR-BLEEDING-CLOTTING-INFECTION

CPT 35860: Re-exploration of Arm or Leg for Bleeding, Clotting, or Infection

CPT-35870-GRAFT-ENTERIC-FISTULA-REPAIR

CPT 35870: Repair of Vascular Graft‑to‑Intestine Fistula

CPT-35875-VASCULAR-GRAFT-THROMBECTOMY-NON-HEMODIALYSIS

CPT 35875: Removal of Clot from Non-Hemodialysis Vascular Graft

CPT-35876-CLOTTED-VASCULAR-GRAFT-REVISION-PATCHING

CPT 35876: Revision of Clotted Vascular Graft, Including Patching

Showing 1–10 of 18

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
`11`	Normal or routine service	Use when this procedure represents the usual, unremarkable service provided.
`22`	Increased procedural services	Use when the exploration required substantially greater work than typical due to dense scar, extensive dissection, or prolonged operative time.
`23`	Unusual anesthesia	Use when general anesthesia is required for a procedure that is usually performed with local/regional anesthesia.
`52`	Reduced services	Use when the exploration was intentionally less than described in the code (limited exploration).
`53`	Discontinued procedure	Use when exploration was started but discontinued due to patient instability or intraoperative findings preventing completion.
`59`	Distinct procedural service	Use when a separately identifiable exploration is performed at a distinct anatomical site or on a different artery during the same operative session.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons during the exploration.
`66`	Surgical team	Use when a surgical team (multiple qualified surgeons) provided the service.
`76`* Not listed in provided modifiers; omitted
`78`	Unplanned return to the operating room	Use when the exploration is an unplanned return to the OR for a postoperative complication.
`80`	Assistant surgeon	Use when an assistant surgeon performed part of the procedure.
`81`	Minimum assistant surgeon	Use when a minimal assistant role was provided.
`82`	Assistant surgeon (qualified resident)	Use when a qualified resident provided assistant surgeon services without an attending.
`LT`	Left side	Use to identify the procedure performed on the left lower extremity.
`RT`	Right side	Use to identify the procedure performed on the right lower extremity.

Taxonomy Code	Specialty	Notes
`2080S00000X`	Vascular Surgery	Surgeons who most commonly perform lower extremity arterial explorations.
`207K00000X`	Cardiovascular Thoracic Surgery	Surgeons involved when complex vascular reconstructions are anticipated.
`207L00000X`	Surgery - General	General surgeons in some settings perform lower extremity explorations.
`207RG0100X`	Interventional Cardiology	May be involved for endovascular assessment but less commonly for open explorations.
`363L00000X`	Emergency Medicine	Emergency physicians may identify the need for urgent exploration and facilitate transfer.

*Note: Only modifiers listed in the provided input were considered; 76 was not in the provided list and is therefore not used here.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I80.2`	Phlebitis and thrombophlebitis of other deep vessels of lower extremities	Deep venous thrombosis or thrombophlebitis may be evaluated or excluded during exploration of postoperative lower extremity sites.
`I74.3`	Embolism and thrombosis of arteries of lower extremities	Acute arterial occlusion potentially identified during exploration when sudden ischemia occurs.
`I97.1`	Postprocedural disorders of circulation, not elsewhere classified	General code for postoperative vascular complications discovered on exploration.
`T81.0XXA`	Hemorrhage and hematoma complicating a procedure, initial encounter	Exploration is commonly performed to evaluate postoperative bleeding or hematoma at the surgical site.
`I70.213`	Atherosclerosis of autologous vein bypass graft of the right leg with intermittent claudication	Patients with prior bypass grafts may undergo exploration for graft-related complications.
`T82.8XXA`	Other complications of vascular prosthetic devices, implants and grafts, initial encounter	Exploration may assess graft leaks, graft failure, or infection without definitive repair.
`L97.423`	Non-pressure chronic ulcer of left heel and midfoot with fat layer exposed	Chronic ischemic ulcers may prompt exploration of prior bypass or arterial surgery sites when limb perfusion is assessed.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`35703`	Exploration of previously operated area, lower extremity, without repair	Principal procedure described: exploration to evaluate for postoperative injury, clot, or bleeding without performing repair.
`35831`	Revision, vascular access (e.g., arteriovenous fistula, graft); upper or lower extremity	May be performed if exploration reveals need for access revision; represents a potential subsequent repair procedure.
`34201`	Thrombectomy, embolectomy, with or without endarterectomy, femoral or popliteal artery; without bypass	Performed when exploration identifies thrombus requiring removal; would be billed if definitive thrombectomy is performed.
`34701`	Repair of vessel (artery), direct; femoral artery	Represents arterial repair that could follow exploration if a repair is undertaken.
`35566`	Open treatment of popliteal artery aneurysm, with or without graft	Example of a definitive vascular procedure that might follow diagnostic exploration if an aneurysm or major lesion is identified.

CPT 35700: Reoperation on Arterial Bypass Graft

CPT-35701-NECK-ARTERY-EXPLORATION-SCAR-TISSUE-REMOVAL

CPT 35701: Neck Artery Exploration and Scar Tissue Removal

CPT-35702-UPPER-EXTREMITY-VASCULAR-EXPLORATION-NO-REPAIR

CPT 35702: Upper Extremity Vascular Exploration, No Repair

CPT-35800-NECK-WOUND-EXPLORATION-CONTROL-BLEEDING-INFECTION

CPT 35800: Neck Exploration for Bleeding, Clot, or Infection

CPT-35820-REOPEN-CHEST-TO-CONTROL-BLEEDING-CLOTTING-INFECTION

CPT 35820: Reopen Chest to Control Bleeding, Clotting, or Infection

CPT-35840-ABDOMINAL-RE-EXPLORATION-FOR-BLEEDING-OR-INFECTION

CPT 35840: Abdominal Re-exploration for Bleeding or Infection

CPT-35860-EXTREMITY-RE-EXPLORATION-FOR-BLEEDING-CLOTTING-INFECTION

CPT 35860: Re-exploration of Arm or Leg for Bleeding, Clotting, or Infection

CPT-35870-GRAFT-ENTERIC-FISTULA-REPAIR

CPT 35870: Repair of Vascular Graft‑to‑Intestine Fistula

CPT-35875-VASCULAR-GRAFT-THROMBECTOMY-NON-HEMODIALYSIS

CPT 35875: Removal of Clot from Non-Hemodialysis Vascular Graft

CPT-35876-CLOTTED-VASCULAR-GRAFT-REVISION-PATCHING

CPT 35876: Revision of Clotted Vascular Graft, Including Patching

Showing 1–10 of 18

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.

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CPT 35703: Exploratory Lower-Extremity Arterial Procedure Without Repair

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Billing Code Overview

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CPT 35703: Exploratory Lower-Extremity Arterial Procedure Without Repair

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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