Vascular Surgery Billing 2026

Endovascular Codes, Global Periods and Denial Prevention

By Yagnesh Dave  ·  September 2026  ·  16 min read

Vascular surgery billing is hard in a very specific way. The procedures are high-value, the code sets are complicated, the endovascular and open surgery code families don't overlap, and the global period rules create ongoing compliance exposure for practices that aren't tracking postoperative service billing carefully. A single misidentified global period violation, billing a routine postoperative visit that should have been included in the surgical payment, is a straightforward false claims liability.

This guide focuses on what vascular surgery practices actually lose money on in 2026: endovascular code selection, open surgery billing, lower extremity revascularization, global period management, modifier strategy, and the audit patterns worth checking in your own claims.

Endovascular Aortic Repair Billing: Code Selection by Device Configuration

The endovascular AAA repair code set was restructured starting in 2019, and a surprising number of practices are still using the old codes or selecting the wrong new codes based on device configuration. The codes run from 34701 through 34834 and the correct code depends on the graft configuration, the access method, and what additional components were deployed during the procedure.

Extension prostheses are reported separately: 34709 is an add-on for each extension placed during the repair. The rupture column is not a severity upgrade; it applies only when rupture is documented.

The operative report must document the specific graft type deployed, the landing zones, any extension components and whether the aneurysm was ruptured, because that's what separates one code in the table from the next. Billing a non-rupture code for a ruptured repair undercodes the case, and billing a rupture code without documented rupture invites a downcode. Have a coder review operative reports from the last 12 months to confirm code selection matches the device configuration documentation.

Open Vascular Surgery: Aortic and Peripheral Arterial Codes

Open surgery codes haven't changed dramatically in the last few years, but the shift toward endovascular repair has left many practices with coders who are less fluent in the open surgery code set. When a patient needs open repair, because their anatomy won't support endovascular, because they've had prior endovascular failure, or because of urgency; the billing needs to reflect the actual procedure accurately.

2026 Lower Extremity Revascularization Codes (37254-37299)

CPT deleted codes 37220 to 37235 on January 1, 2026 and replaced them with 46 territory-based codes, 37254 to 37299. They split by iliac, femoral-popliteal, tibial-peroneal and inframalleolar territory, and by simple (stenosis) or complex (occlusion) lesion, so the operative note must name each lesion type.

Intravascular lithotripsy has its own add-ons (37262 for iliac, 37279 for femoral-popliteal). At 2026 Medicare national facility rates, the first-vessel codes run from about $336 for 37254 (first iliac angioplasty) to about $814 for 37294 (complex tibial-peroneal stent with atherectomy), and the first-vessel codes I checked carry a 0-day global. Legacy codes such as 37228 apply only to dates of service before 2026.

Atherectomy is now reported in the femoral-popliteal territory with 37271 to 37274 and in the tibial-peroneal territory with 37288 to 37291. Atherectomy with stenting uses 37275 to 37278 and 37292 to 37295. The old codes 37225, 37227, 37229, 37231, 37233 and 37235 were deleted.

Lower Extremity Revascularization: Medical Necessity and Prior Auth

Lower extremity revascularization (whether endovascular (angioplasty, stenting, atherectomy) or open bypass) faces the most aggressive medical necessity scrutiny of any vascular procedure group. Payers have tightened their criteria, and first-submission denials on CLI (chronic limb-threatening ischemia) procedures are common.

What payers want to see before they'll approve lower extremity revascularization is specific. They need documented Rutherford classification, ABI measurements (typically below 0.9 for claudication, below 0.5 for rest pain), prior conservative treatment history, imaging showing the target lesion, and a clear statement of the functional or limb-preservation indication. A note that says "patient has leg pain and peripheral vascular disease" will not get through prior auth, and a claim submitted without auth where auth was required goes to denial automatically.

The atherectomy prior auth situation deserves specific attention. Many commercial payers require prior authorization for lower extremity atherectomy (now reported with 37271 to 37278 and 37288 to 37295) and set medical necessity criteria that go beyond standard revascularization requirements. Some plans require a peer-to-peer review for atherectomy cases before they approve. That takes physician time, so build it into the scheduling workflow for planned procedures. If an authorization was issued under the deleted 2025 codes, confirm with the payer that it still maps to the 2026 code before the date of service.

Global Period Management in Vascular Surgery Billing

Most open vascular procedures, including EVAR (34701 to 34708), carotid endarterectomy and open bypass, carry a 90-day global period. The 2026 revascularization codes in the table above are different: the first-vessel codes I checked carry a 0-day global, so check the global days for the exact code before you apply the rules below. For a 90-day code, that window starts on the day of surgery and runs through postoperative day 90. During that window, routine postoperative services, normal wound checks, and follow-up visits directly related to the surgery cannot be billed separately; they're included in the surgical payment.

What can be billed separately during the global period: unrelated problems addressed during a visit (modifier 24), significant complications requiring a return to the OR (modifier 78), complications managed in the office that represent services above and beyond routine postoperative care (modifier 79 for unrelated procedures), and staged procedures that were planned from the outset (modifier 58).

Modifier Strategy for Vascular Surgery

Modifiers are where a lot of vascular surgery revenue gets lost quietly. The right modifier on the right code is the difference between a paid claim and a denial. Here are the modifiers that matter most in vascular surgery.

Modifier 50 applies to truly bilateral procedures performed during the same operative session. Bilateral carotid endarterectomy is extremely rare, but bilateral lower extremity procedures (bilateral femoral endarterectomy, bilateral iliac stenting) do occur. When both sides are performed, the primary code gets modifier 50 and the claim reports the procedure once with payment at 150 percent of the unilateral rate. Don't bill the same code twice on two separate lines; that's how you generate NCCI edit denials.

Modifier 62 applies to co-surgery, where two surgeons work together on a complex vascular case and each performs distinct portions of the procedure. For modifier 62 to be valid, both surgeons must document their individual contributions in separate operative notes, both must be present and operating simultaneously for the key portions of the procedure, and the procedure code must allow co-surgery according to CMS payment policy. Payment is split at 62.5 percent of the fee schedule for each surgeon.

Common Vascular Surgery Denial Patterns and Fixes

The denials in vascular surgery are patterned. Once you understand the six or seven reasons that account for most of your write-offs, the fixes become straightforward. The problem is most practices don't track denials by procedure code and denial reason systematically, so the same errors repeat month after month.

OIG Audit Exposure and RAC Activity in Vascular Surgery Billing

Vascular surgery claims are high in value and heavy on documentation, which makes them natural audit candidates. The two patterns below are the ones to check in your own claims first.

The two patterns worth checking first: First, global period violations: specifically practices with high rates of E/M billing during the 90-day postoperative window without modifiers 24, 78, or 79. A practice billing 40 to 50 follow-up visits per month without reviewing global period status is generating a rolling audit liability. Second, endovascular repair code mismatches, cases where the operative report documents one device configuration but the claim reports a code for a different configuration.

Code selection errors in endovascular repair run in both directions. Upcoding triggers repayment and potential false claims exposure, and undercoding leaves real money on the table. Both are errors. An annual internal coding audit of a sample of your endovascular cases is the fastest way to identify which pattern your practice has and correct it before an external auditor does it for you.

Frequently Asked Questions About Vascular Surgery Billing 2026

What replaced CPT 37224 and the 37220-37235 codes?

CPT deleted codes 37220 to 37235 on January 1, 2026 and replaced them with 46 territory-based codes, 37254 to 37299. They split by iliac, femoral-popliteal, tibial-peroneal and inframalleolar territory, and by simple (stenosis) or complex (occlusion) lesion, so the operative note must name each lesion type.

What are the 2026 atherectomy codes?

Atherectomy is now reported in the femoral-popliteal territory with 37271 to 37274 and in the tibial-peroneal territory with 37288 to 37291. Atherectomy with stenting uses 37275 to 37278 and 37292 to 37295. The old codes 37225, 37227, 37229, 37231, 37233 and 37235 were deleted.

Which code reports an infrarenal EVAR with a bifurcated graft?

CPT 34705 reports endovascular repair of an infrarenal aortic aneurysm with an aorto-bi-iliac endograft, and 34706 reports the same repair for a ruptured aneurysm. 34701 and 34702 are the aorto-aortic tube versions, and 34703 and 34704 are aorto-uni-iliac.

What is the global period for major vascular surgery procedures?

Most major vascular surgery procedures carry a 90-day global period under Medicare. This means postoperative E/M visits, routine wound checks, and follow-up care related to the surgery are included in the surgical payment and cannot be billed separately during that window. Unrelated problems, significant complications requiring additional procedures, and complication management that goes beyond routine postoperative care can be billed separately with appropriate modifier documentation.

How do you bill endovascular vs open vascular surgery?

Endovascular and open surgery use separate CPT code families. Endovascular repair of abdominal aortic aneurysm uses codes 34701 to 34834 depending on the device configuration and access method. Open AAA repair uses 35081 or 35102. These are mutually exclusive on the same claim. Add-on codes for endovascular procedures cover additional docking limbs, extension prostheses, and iliac embolization when performed. The claim must specify the anatomic location, device type, and any additional components.

What are the top OIG audit targets in vascular surgery billing?

OIG and RAC auditors in vascular surgery focus on: global period billing violations where postoperative services were billed separately without a qualifying modifier, endovascular vs open code selection mismatches with operative reports, lower extremity revascularization medical necessity documentation, and modifier 50 bilateral billing for paired vessel procedures. Auditors also flag high rates of modifier 22 (increased complexity) claims without supporting documentation.