Find policies, billing codes, payers, states, and providers

CPT 75635: CTA of Abdominal Aorta and Bilateral Iliofemoral Arteries

CPT code 75635 covers contrast-enhanced computed tomographic angiography (CTA) of the abdominal aorta and both iliofemoral arteries, including any noncontrast images and required postprocessing. This CTA is a key diagnostic tool for assessing aortoiliac and peripheral arterial disease, preoperative vascular planning, and evaluation of suspected aneurysm or arterial occlusive disease. Nationally, accurate use and coding of 75635 affects coverage determinations, prior authorization workflows, and aggregate imaging utilization for cardiovascular and vascular services.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise account of what 75635 represents clinically and operationally, typical sites where the service is performed, and which payers commonly cover or adjudicate this CTA. The publication provides benchmarks for service utilization, notes on billing practices relevant to bundled imaging components, and context for clinical indications driving CTA of the aortoiliac and iliofemoral circulation.

The content aims to inform billing professionals, radiology and vascular service line managers, and policy analysts about coding clarity and common payer considerations for CTA of the abdominal aorta and bilateral iliofemoral arteries using CPT code 75635.

Customize your policy alerts

Sign up for cpt 75635 policy alerts

Get alerted when payer policies referencing 75635 are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Billing Code Overview

CPT code 75635 describes computed tomographic angiography (CTA) of the abdominal aorta and bilateral iliofemoral arteries with administration of contrast material. The service may include noncontrast images and postprocessing of images performed after completion of the study; those elements are considered part of the CTA and should not be billed separately.

Service type: Imaging — Vascular CTA with contrast

Typical site of service: Hospital outpatient imaging center, outpatient radiology suite, or ambulatory imaging center

Find policies, billing codes, payers, states, and providers

CPT 75635: CTA of Abdominal Aorta and Bilateral Iliofemoral Arteries

Customize your policy alerts

Sign up for cpt 75635 policy alerts

Get alerted when payer policies referencing 75635 are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Billing Code Overview

Service type: Imaging — Vascular CTA with contrast

Typical site of service: Hospital outpatient imaging center, outpatient radiology suite, or ambulatory imaging center

Clinical & Coding Specifications

Clinical Context

A 68-year-old male with a history of peripheral arterial disease and increasing claudication is referred from his vascular surgery clinic for imaging to assess the abdominal aorta and iliofemoral arterial segments. The patient reports progressive leg pain with ambulation and diminished ankle-brachial indices on exam. The ordering vascular surgeon requests a computed tomographic angiography (CTA) of the abdominal aorta through the bilateral iliofemoral arteries to define stenosis, occlusion, and arterial anatomy prior to planning endovascular intervention.

The clinical workflow: pre-procedure nursing screening for contrast allergy and renal function (recent serum creatinine), IV access is obtained, informed consent is confirmed, and CT technologist programs the CTA protocol including timing bolus or automated contrast injection. The radiologist administers the iodinated contrast and performs the CTA, including any necessary noncontrast images and postprocessing reconstruction (multiplanar and 3D volume-rendered images). The radiologist interprets the study, dictating findings such as location and severity of atherosclerotic plaque, luminal stenosis, occlusion, aneurysm, or graft status. Images and report are routed to the ordering vascular surgeon for treatment planning.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when reporting only the physician interpretation when facility (technical) component billed separately.
`TC`	Technical component	Use when reporting only technical services (scanner, contrast, technologist) and physician interpretation billed separately.
`52`	Reduced services	Use when study is partially completed or limited relative to full CTA (e.g., patient motion prevented full coverage).
`53`	Discontinued procedure	Use when CTA is started but terminated due to patient instability or contrast reaction.
`59`	Distinct procedural service	Use to indicate a separate, distinct CTA when multiple imaging procedures could be bundled, provided clinical circumstances justify distinct service.
`76`	Repeat procedure by same physician	Use when the same supervising radiologist repeats CTA procedure the same day for additional needed images.
`77`	Repeat procedure by another physician	Use when a different radiologist repeats the CTA the same day.
`91`	Repeat clinical diagnostic laboratory test	Rare for imaging; use when a contrast-related lab (e.g., creatinine) is repeated and reported as separate billable service per payer rules.
`50`	Bilateral procedure	Use when documentation or payer requires explicit bilateral modifier for procedures that are not inherently bilateral; typically not appended to CTA but included here for workflows where payer requests.
`22`	Increased procedural services	Use when documentation supports substantially greater complexity or time (e.g., extensive contrast bolus or difficult vascular access) and payer allows.
`25`	Significant, separately identifiable E/M service	Use when a same-day evaluation and management visit by the ordering provider is separately reported along with the imaging service.

Taxonomy Code	Specialty	Notes
`207RG0300X`	Diagnostic Radiology	Radiologists perform and interpret CTA studies.
`208C00000X`	Vascular Surgery	Vascular surgeons commonly order CTA for preoperative planning.
`207T00000X`	Interventional Radiology	Interventional radiologists perform and interpret vascular CTAs and plan interventions.
`2080P0005X`	Cardiovascular Disease (Cardiology)	Cardiology may order CTA for aortic or peripheral vascular assessment.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I70.201`	Atherosclerosis of native arteries of extremities, bilateral legs, unspecified	Peripheral arterial disease is a primary indication for CTA to evaluate stenosis and plan revascularization.
`I70.0`	Atherosclerotic disease of arteries of the extremities	General code representing atherosclerotic peripheral vascular disease prompting vascular imaging.
`I71.3`	Abdominal aortic aneurysm, without rupture	CTA assesses size, extent, and iliac involvement for surveillance and preoperative planning.
`I82.401`	Acute embolism and thrombosis of unspecified deep veins of right lower extremity	While primarily venous, CTA of arteries may be ordered to exclude arterial occlusion in complex presentations.
`R02`	Gangrene, not elsewhere classified	Severe ischemia/gangrene warrants CTA to identify arterial occlusion and guide revascularization decisions.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`74177`	Computed tomography, abdomen and pelvis; with contrast material(s)	May be performed when abdominal organs require evaluation in conjunction with aortoiliac CTA; contrast phases may overlap.
`71260`	Computed tomography, chest; with contrast material(s)	Performed when thoracic aortic pathology or concurrent chest vascular evaluation is needed in the same episode.
`93975`	Duplex scan of arterial inflow and outflow, unilateral or bilateral, complete	Noninvasive vascular lab study commonly performed before or after CTA to assess hemodynamics and limb perfusion.
`93571`	Vascular imaging, selective catheter angiography, arterial, radiological supervision and interpretation	Digital subtraction angiography that may follow CTA when intervention is planned; used for catheter-directed procedures.
`70496`	Computed tomography, head or brain; CTA, without contrast, with contrast, and further evaluation	Included as an example of CTA technique in other anatomic regions; not typically billed with abdominal CTA but shares imaging methodology.

CPT 75600: Thoracic Aortography Imaging Supervision and Interpretation

CPT-75605-THORACIC-AORTOGRAPHY-IMAGING-SUPERVISION-INTERPRETATION

CPT 75605: Thoracic Aortography Imaging Supervision and Interpretation

CPT-75625-ABDOMINAL-AORTOGRAPHY-IMAGING-SUPERVISION-INTERPRETATION

CPT 75625: Abdominal Aortography Imaging Supervision and Interpretation

CPT-75630-ABDOMINAL-AORTA-AND-ILIOFEMORAL-ARTERIES-ANGIOGRAPHY

CPT 75630: Radiologic Imaging of Abdominal Aorta and Iliofemoral Arteries

CPT-75705-SPINAL-ANGIOGRAPHY-RADIOLOGICAL-SUPERVISION-INTERPRETATION

CPT 75705: Spinal Angiography, Supervision and Interpretation

CPT-75710-EXTREMITY-ANGIOGRAPHY-RADIOLOGICAL-SUPERVISION-INTERPRETATION

CPT 75710: Radiological Supervision and Interpretation for Extremity Angiography

CPT-75716-BILATERAL-EXTREMITY-ANGIOGRAPHY-RADIOLOGICAL-SUPERVISION

CPT 75716: Radiological Supervision and Interpretation for Bilateral Extremity Angiography

CPT-75726-VISCERAL-ARTERY-ANGIOGRAPHIC-SUPERVISION-INTERPRETATION

CPT 75726: Visceral Artery Angiographic Supervision and Interpretation

CPT-75731-ADRENAL-ARTERY-SELECTIVE-ANGIOGRAPHY-INTERPRETATION

CPT 75731: Adrenal Artery Selective Angiography, Radiology Supervision and Interpretation

CPT-75733-BILATERAL-ADRENAL-ARTERY-SELECTIVE-ANGIOGRAPHY-RSI

CPT 75733: Bilateral Selective Adrenal Artery Angiography, Radiological Supervision and Interpretation

Showing 1–10 of 16

Frequently Asked Questions

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
`26`	Professional component	Use when reporting only the physician interpretation when facility (technical) component billed separately.
`TC`	Technical component	Use when reporting only technical services (scanner, contrast, technologist) and physician interpretation billed separately.
`52`	Reduced services	Use when study is partially completed or limited relative to full CTA (e.g., patient motion prevented full coverage).
`53`	Discontinued procedure	Use when CTA is started but terminated due to patient instability or contrast reaction.
`59`	Distinct procedural service	Use to indicate a separate, distinct CTA when multiple imaging procedures could be bundled, provided clinical circumstances justify distinct service.
`76`	Repeat procedure by same physician	Use when the same supervising radiologist repeats CTA procedure the same day for additional needed images.
`77`	Repeat procedure by another physician	Use when a different radiologist repeats the CTA the same day.
`91`	Repeat clinical diagnostic laboratory test	Rare for imaging; use when a contrast-related lab (e.g., creatinine) is repeated and reported as separate billable service per payer rules.
`50`	Bilateral procedure	Use when documentation or payer requires explicit bilateral modifier for procedures that are not inherently bilateral; typically not appended to CTA but included here for workflows where payer requests.
`22`	Increased procedural services	Use when documentation supports substantially greater complexity or time (e.g., extensive contrast bolus or difficult vascular access) and payer allows.
`25`	Significant, separately identifiable E/M service	Use when a same-day evaluation and management visit by the ordering provider is separately reported along with the imaging service.

Taxonomy Code	Specialty	Notes
`207RG0300X`	Diagnostic Radiology	Radiologists perform and interpret CTA studies.
`208C00000X`	Vascular Surgery	Vascular surgeons commonly order CTA for preoperative planning.
`207T00000X`	Interventional Radiology	Interventional radiologists perform and interpret vascular CTAs and plan interventions.
`2080P0005X`	Cardiovascular Disease (Cardiology)	Cardiology may order CTA for aortic or peripheral vascular assessment.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I70.201`	Atherosclerosis of native arteries of extremities, bilateral legs, unspecified	Peripheral arterial disease is a primary indication for CTA to evaluate stenosis and plan revascularization.
`I70.0`	Atherosclerotic disease of arteries of the extremities	General code representing atherosclerotic peripheral vascular disease prompting vascular imaging.
`I71.3`	Abdominal aortic aneurysm, without rupture	CTA assesses size, extent, and iliac involvement for surveillance and preoperative planning.
`I82.401`	Acute embolism and thrombosis of unspecified deep veins of right lower extremity	While primarily venous, CTA of arteries may be ordered to exclude arterial occlusion in complex presentations.
`R02`	Gangrene, not elsewhere classified	Severe ischemia/gangrene warrants CTA to identify arterial occlusion and guide revascularization decisions.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`74177`	Computed tomography, abdomen and pelvis; with contrast material(s)	May be performed when abdominal organs require evaluation in conjunction with aortoiliac CTA; contrast phases may overlap.
`71260`	Computed tomography, chest; with contrast material(s)	Performed when thoracic aortic pathology or concurrent chest vascular evaluation is needed in the same episode.
`93975`	Duplex scan of arterial inflow and outflow, unilateral or bilateral, complete	Noninvasive vascular lab study commonly performed before or after CTA to assess hemodynamics and limb perfusion.
`93571`	Vascular imaging, selective catheter angiography, arterial, radiological supervision and interpretation	Digital subtraction angiography that may follow CTA when intervention is planned; used for catheter-directed procedures.
`70496`	Computed tomography, head or brain; CTA, without contrast, with contrast, and further evaluation	Included as an example of CTA technique in other anatomic regions; not typically billed with abdominal CTA but shares imaging methodology.

CPT 75600: Thoracic Aortography Imaging Supervision and Interpretation

CPT-75605-THORACIC-AORTOGRAPHY-IMAGING-SUPERVISION-INTERPRETATION

CPT 75605: Thoracic Aortography Imaging Supervision and Interpretation

CPT-75625-ABDOMINAL-AORTOGRAPHY-IMAGING-SUPERVISION-INTERPRETATION

CPT 75625: Abdominal Aortography Imaging Supervision and Interpretation

CPT-75630-ABDOMINAL-AORTA-AND-ILIOFEMORAL-ARTERIES-ANGIOGRAPHY

CPT 75630: Radiologic Imaging of Abdominal Aorta and Iliofemoral Arteries

CPT-75705-SPINAL-ANGIOGRAPHY-RADIOLOGICAL-SUPERVISION-INTERPRETATION

CPT 75705: Spinal Angiography, Supervision and Interpretation

CPT-75710-EXTREMITY-ANGIOGRAPHY-RADIOLOGICAL-SUPERVISION-INTERPRETATION

CPT 75710: Radiological Supervision and Interpretation for Extremity Angiography

CPT-75716-BILATERAL-EXTREMITY-ANGIOGRAPHY-RADIOLOGICAL-SUPERVISION

CPT 75716: Radiological Supervision and Interpretation for Bilateral Extremity Angiography

CPT-75726-VISCERAL-ARTERY-ANGIOGRAPHIC-SUPERVISION-INTERPRETATION

CPT 75726: Visceral Artery Angiographic Supervision and Interpretation

CPT-75731-ADRENAL-ARTERY-SELECTIVE-ANGIOGRAPHY-INTERPRETATION

CPT 75731: Adrenal Artery Selective Angiography, Radiology Supervision and Interpretation

CPT-75733-BILATERAL-ADRENAL-ARTERY-SELECTIVE-ANGIOGRAPHY-RSI

CPT 75733: Bilateral Selective Adrenal Artery Angiography, Radiological Supervision and Interpretation

Showing 1–10 of 16

Frequently Asked Questions

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 75635: CTA of Abdominal Aorta and Bilateral Iliofemoral Arteries

Sign up for cpt 75635 policy alerts

Billing Code Overview

Catch payer policy changes before they impact reimbursement

Catch payer policy changes before they impact reimbursement

OpenPayer

CPT 75635: CTA of Abdominal Aorta and Bilateral Iliofemoral Arteries

Sign up for cpt 75635 policy alerts

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

CPT 75635: CTA of Abdominal Aorta and Bilateral Iliofemoral Arteries

Sign up for cpt 75635 policy alerts

Billing Code Overview

CPT 75635: CTA of Abdominal Aorta and Bilateral Iliofemoral Arteries

Sign up for cpt 75635 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does CPT 75635 cover and are noncontrast images or postprocessing billed separately?

Which modifiers are commonly used with 75635 and when should they be applied?

What other imaging CPT codes are frequently related to or performed with 75635?

What clinical scenarios commonly justify ordering a CTA under CPT 75635?

Which payers commonly cover CPT 75635 and why is accurate coding important?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does CPT 75635 cover and are noncontrast images or postprocessing billed separately?

Which modifiers are commonly used with 75635 and when should they be applied?

What other imaging CPT codes are frequently related to or performed with 75635?

What clinical scenarios commonly justify ordering a CTA under CPT 75635?

Which payers commonly cover CPT 75635 and why is accurate coding important?

References