CPT code 34705 – Endovascular aorto-bi-iliac endograft repair

Key takeaways

CPT code 34705 covers endovascular repair with a bifurcated endograft whose limbs land in both common iliac arteries, for other than rupture.

Aorta-only repair with a tube graft is 34701, a graft from the aorta into one common iliac is 34703, and iliac-only repair is 34707.

The global period is 90 days, and fluoroscopy, nonselective catheterization and radiological supervision for the graft are bundled into the code.

Add-on 34709 is reported per vessel for an extension placed beyond the common iliac artery or above the renal arteries.

Pabau, the practice management platform we build, tracks CPT codes from the operative note to the claim and surfaces denial reasons on each remittance.

CPT code 34705: Official descriptor and procedure scope

CPT code 34705 is the code for endovascular repair of the infrarenal aorta and/or iliac arteries with an aorto-bi-iliac endograft, for other than rupture. The American Medical Association descriptor opens with “Endovascular repair of infrarenal aorta and/or iliac artery(ies) by deployment of an aorto-bi-iliac endograft.”

Two anatomical facts must both appear in the operative report. The graft must span the infrarenal aorta, and a limb must land in each iliac artery. The descriptor closes with “for other than rupture (eg, for aneurysm, pseudoaneurysm, dissection, penetrating ulcer).”

The procedure starts with percutaneous or open femoral access. The surgeon delivers the bifurcated endograft under fluoroscopy and seals it in the aortic neck and both iliac landing zones. Completion angiography then confirms that the aneurysm sac is excluded.

What is included in CPT code 34705

The descriptor itself bundles the following work into 34705, so none of it is reported as an extra line item:

• Pre-procedure sizing and device selection
• All nonselective catheterization, including the guidewires and catheters used to place the graft
• All associated radiological supervision and interpretation, including intraoperative fluoroscopy and angiography
• Every endograft extension placed in the aorta between the renal arteries and the iliac bifurcation
• All angioplasty or stenting performed between the renal arteries and the iliac bifurcation
• The introducer sheath systems used for access

What is not included in 34705: Separately billable services

Several services performed in the same session may be reported separately when the documentation supports them. The table shows which add-on codes apply and where NCCI bundling edits block a separate line.

CMS updates the National Correct Coding Initiative (NCCI) edits every quarter. Check the current edit version before you treat a service as separately reportable. Billing a bundled service without the right modifier is a primary audit trigger on vascular claims.

CPT code 34705 vs. 34703: How to choose the right EVAR code

34703 covers an aorto-uni-iliac endograft, which runs from the infrarenal aorta into one common iliac artery only. 34705 requires a bifurcated graft with a limb in each iliac artery. Aorta-only repair with a tube graft is a third code, 34701. The distal landing zones in the operative report decide which one applies, as the decision panel below shows.

Staged cases cause the most confusion. When a single iliac limb is deployed from an aortic graft, the session matches the uni-iliac code 34703. When both limbs are placed in one session, the code is 34705. For a contralateral limb added later, code from the operative report and check the payer’s policy before you submit.

Complete EVAR CPT code family reference

The 2018 CPT restructure replaced the 34800-series EVAR codes with a family organized by endograft type, landing zone and rupture status. The table covers the primary and add-on codes most relevant to aortoiliac repair alongside CPT code 34705.

Search the full 34701-34834 range with the AAPC Codify CPT lookup or the AMA’s own resources. Our CPT code library also covers the neighboring procedure codes one page at a time. Before 2018, codes such as 34800 and 34802 did not separate graft type or landing zone, and they were deleted with the restructure.

ICD-10 diagnosis codes required to support medical necessity for CPT 34705

Medical necessity for CPT code 34705 needs an ICD-10-CM code that states the type, location and status of the aneurysm. Payers check the diagnosis against the size documentation and imaging in the record. A mismatch between the ICD-10 code and the operative note is a leading denial trigger.

I71.4 and I71.3 became non-billable parent codes in fiscal year 2023, so a claim still carrying either one will reject. Report the six-character code for the documented site.

Size threshold documentation: Most payers, including Medicare, follow Society for Vascular Surgery (SVS) guidelines for elective repair in asymptomatic patients. Those guidelines set the threshold at an aneurysm diameter of 5.5 cm or greater. Some payers accept repair from 5.0 cm, and symptomatic aneurysms of any size typically qualify.

The CT angiography report must be in the record before the procedure date. It should state the maximum aortic diameter, neck length, neck angulation and iliac landing zone dimensions. That report supports both prior authorization and medical necessity on the claim.

Medicare reimbursement for CPT code 34705: RVUs, payment rates, and global period

Under the Medicare Physician Fee Schedule (MPFS), CPT code 34705 carries a 90-day global period. Related services in that window are part of the global package and cannot be billed separately. Unrelated E&M visits and new, unrelated procedures are the exceptions. The global period starts on the day of surgery, so postoperative visits through day 90 are included.

RVU values and national payment rates change with every annual MPFS update. Use the CMS Physician Fee Schedule lookup tool to confirm the current-year rate and total RVUs for 34705. The FastRVU lookup tool breaks out work, practice expense and malpractice RVUs with the Medicare amount for each payment locality.

Facility vs. non-facility payment

EVAR is performed in a hospital operating room in the overwhelming majority of cases. The surgeon’s professional fee is paid at the facility rate under the MPFS. The hospital bills separately, under the Outpatient Prospective Payment System (OPPS) or as an inpatient claim.

Before you advise on site-of-service billing, check the current-year CMS Inpatient-Only (IPO) list and the MPFS status indicator for 34705. Both can change with each annual rule.

Hospital-based vascular practices often split facility and professional billing across two departments. Their revenue cycle management needs a clear handoff, so the op note reaches both teams with the landing zones intact.

Prior authorization requirements for CPT code 34705

Traditional Medicare fee-for-service does not require prior authorization for CPT code 34705. Medicare Advantage plans set their own rules, and many require authorization. Commercial payers almost always require it before an elective EVAR. A missing authorization is one of the top denial reasons on high-value vascular claims.

Medical billing compliance for high-cost vascular procedures starts with the authorization request. Payers typically ask for the following:

• CT angiography report with the maximum aortic diameter, neck length and landing zone anatomy
• Operative indication stating the clinical rationale (symptomatic, rapid expansion, or size threshold met)
• Physician attestation that the patient meets SVS guideline criteria for elective repair
• The patient’s relevant comorbidities and surgical risk classification (ASA class)
• Planned devices and graft brand, since some payers keep approved-device lists

Medicare Advantage plans may also want the authorization to name 34705 and any planned add-on codes, such as 34709 or 34808. An authorization for one code followed by a claim for another creates a mismatch. Payers deny that mismatch separately from medical necessity.

Documentation requirements for a clean CPT 34705 claim

The operative report is the primary documentation source for 34705. Building a clean claim for EVAR means the op note addresses each element below. Missing even one gives the payer grounds to downcode, deny or audit the claim.

• Prosthesis type: The report states that a bifurcated (aorto-bi-iliac) endograft was placed, not a tube or aorto-uni-iliac graft.
• Bilateral iliac deployment: Both iliac landing zones are described. A report that documents only one iliac limb supports 34703, not 34705.
• Access method: The note records open femoral cutdown or percutaneous access. Open exposure may support a separate 34812 (femoral artery exposure, unilateral).
• Fluoroscopic guidance: The note confirms fluoroscopy was used. It is bundled, but it must still be documented as performed.
• Intraoperative angiography: Completion angiography confirming aneurysm exclusion and graft position is documented.
• Device details: Graft brand, model, lot number and dimensions are recorded, since payers and audit programs may request them.
• Diagnosis correlation: The preoperative diagnosis, including AAA diameter and location, matches the ICD-10-CM code submitted.

A vascular surgery superbill should capture the prosthesis type and unilateral or bilateral iliac involvement as separate fields. Without them, the coder has to infer the code from a vague procedure description. A generic “EVAR” entry with no graft type is a persistent source of miscoding.

Common claim denial reasons for CPT code 34705 and how to prevent them

Denials on CPT code 34705 cluster around four root causes: Wrong code selection, prior authorization failure, bundling errors and missing medical necessity evidence. Each has its own fix.

High-value vascular claims need denial management workflows with a first-pass review within 48 hours of the remittance. Route EVAR denials to a coder with vascular experience rather than a general billing queue.

Practices with steady EVAR volume should track the 34705 denial rate by payer and reason each quarter. A pattern, such as one payer that keeps asking for modifier 22 documentation, shows up faster than it would claim by claim.

Modifier usage with CPT code 34705

Modifiers explain a departure from the standard 34705 scenario or prevent inappropriate bundling. A wrong or missing modifier causes denials that are preventable at claim submission.

Modifier 22 needs the most supporting detail on 34705 claims. Payers expect the operative note to quantify the complexity, and vague language such as “the procedure was complex” falls short.

A stronger note reads “hostile neck with angulation greater than 60 degrees requiring adjunctive balloon molding and extended fluoroscopy time.” That gives the clinical reviewer a basis for approval. Without that detail, the claim returns to base payment.

How Pabau keeps EVAR claims matched to the operative report

In most vascular practices, the coder reads the op note days after the case and picks a code from a generic “EVAR” superbill line. The difference between 34703 and 34705 is one iliac limb, and that detail is easy to miss in a narrative report.

Pabau’s vascular billing claims management keeps the CPT code, add-on codes and diagnosis on the same record as the clinical note. Claims go out through our Claim.MD clearinghouse integration, which supports eligibility checks and ERA remittances. Denial and CARC reason codes then appear alongside each claim.

The result is fewer 34705 claims that need rework, and a billing team that can work appeals without switching systems.

Bill EVAR claims from one record

Pabau keeps the operative note, the CPT code and the claim together. Your team submits 34705 claims through Claim.MD, checks eligibility and tracks ERA responses in one place.

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Conclusion

Code 34705 from the landing zones, never from the word “EVAR.” If the op note does not name both iliac limbs, query the surgeon before the claim goes out. A wrong primary code costs a full resubmission cycle on one of the highest-value claims a vascular practice bills.

The fix sits upstream of the coder. Teams newer to medical billing should add graft type and iliac involvement to the superbill first. Book a demo to see how Pabau carries those details from the operative note to a clean 34705 claim.

Continue your research

Need to understand how clearinghouse submission works for surgical claims? Medical claims clearinghouse guide explains how payer routing, real-time edits, and 837P transmission work for high-value procedure codes.

Trying to reduce claim denials across your vascular billing team? Denial codes in medical billing covers CARC and RARC reason codes so your team can action remittance responses faster.

Looking for a primer on electronic remittance for surgical payments? Electronic remittance advice (ERA) explains 835 transaction sets and how ERA data maps to claim adjustments for EVAR reimbursement.

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