Direct Answer
Vascular surgery billing is distinguished by high-value open and endovascular procedures, complex add-on code structures for imaging and intervention, and the dual revenue stream from both surgical and dialysis access maintenance services. The most critical billing concepts are (1) correctly bundling vs. separately billing angiographic supervision and interpretation with endovascular procedures, (2) managing the 90-day global period for open vascular procedures, and (3) properly coding the distinct components of complex endovascular interventions including catheter placement, angioplasty, stenting, and imaging.
Table of Contents
Carotid Endarterectomy and Cerebrovascular Procedures
Carotid endarterectomy (CEA) is the most commonly performed open cerebrovascular procedure in vascular surgery: Carotid endarterectomy CPT codes: 35301 — thromboendarterectomy, including patch graft, if performed; carotid, vertebral, subclavian, by neck incision; 35390 — reoperation, carotid, thromboendarterectomy (List separately in addition to code for primary procedure); Global period: 35301 has a 90-day global period; all routine post-operative care within 90 days is included in the 35301 payment; Carotid angioplasty and stenting (CAS): 37215 — transcatheter placement of intravascular stent(s), cervical carotid artery, open or percutaneous, including angioplasty, when performed, and radiological supervision and interpretation; with distal embolic protection; 37216 — without distal embolic protection; 37215 and 37216 include the angioplasty and all imaging — do not separately bill angiographic S&I codes; Subclavian revascularization: 35301 (cervical approach); 35311 (thoracic approach); vertebral artery: 35515 — bypass graft, with vein; subclavian-vertebral; Carotid duplex ultrasound: 93880 — duplex scan of extracranial arteries; complete bilateral study; 93882 — unilateral or limited study; TC/PC applies; vascular surgeons who perform and interpret their own vascular lab studies bill globally; interpreting a study performed by a vascular technologist bill with Modifier 26.
Endovascular Aortic and Peripheral Procedures
Endovascular aortic repair (EVAR) is the predominant treatment for abdominal aortic aneurysm and has a complex code family: EVAR CPT codes: 34800 — endovascular repair of infrarenal abdominal aortic aneurysm using aorto-aortic tube prosthesis; 34802 — using modular bifurcated prosthesis (1 docking limb); 34803 — using modular bifurcated prosthesis (2 docking limbs); 34804 — using unibody bifurcated prosthesis; 34805 — using aorto-uniiliac prosthesis; Add-on codes for EVAR: 34825 — placement of proximal or distal extension prosthesis for endovascular repair of infrarenal abdominal aortic aneurysm (add-on); 34826 — placement of proximal or distal extension prosthesis for repair of associated arterial trauma; Imaging S&I for EVAR: 75952 — endovascular repair of infrarenal abdominal aortic aneurysm, radiological supervision and interpretation; 75953 — endovascular repair of abdominal aortic aneurysm with extension prosthesis, radiological supervision and interpretation; these are separate from the surgical codes and are billed when the same surgeon performs the imaging interpretation; Thoracic EVAR (TEVAR): 33881 — endovascular repair of descending thoracic aorta; 33883 — involving coverage of left subclavian artery origin; 33886 — placement of proximal extension prosthesis (add-on); Endovascular visceral artery repair: 34841-34848 — fenestrated EVAR involving visceral vessels; these are complex add-on code families for fenestrated/branched EVAR; Catheterization component codes: for endovascular procedures, catheter placement codes are typically bundled into the primary repair code; however, selective catheterization of visceral vessels during fenestrated EVAR may be separately billable — verify NCCI edit status.
Lower Extremity Revascularization
Lower extremity arterial revascularization includes both open bypass and endovascular (PTA/stent) procedures: Open bypass procedures: 35546 — bypass graft, with vein; aortoiliac; 35556 — femoral-popliteal; 35566 — femoral-anterior tibial, posterior tibial, peroneal artery or other distal vessels; 35571 — popliteal-tibial; 35583 — in situ vein bypass; 35585 — in situ vein bypass; femoral-anterior tibial, posterior tibial or peroneal artery; prosthetic graft bypass codes are in the 35656-35671 range; Endovascular lower extremity revascularization (PTA and stenting): the lower extremity endovascular code family was restructured in 2017 with a zone-based approach: iliac zone: 37220-37223; femoral-popliteal zone: 37224-37227; tibial-peroneal zone: 37228-37235; Each zone has: an initial service code (e.g., 37220 for iliac PTA); stent placement add-on (e.g., 37221); additional vessel in same zone add-on (e.g., 37222); stent in additional vessel add-on (e.g., 37223); Imaging S&I for peripheral endovascular: 75962 — transluminal balloon angioplasty, peripheral artery, radiological supervision and interpretation; imaging supervision and interpretation codes are included in the zone-based peripheral endovascular codes — do not separately bill 75962 when using the 37220-37235 code family; Angiography: 75710 — angiography, extremity, unilateral, radiological supervision and interpretation; 75716 — bilateral; when diagnostic angiography is performed before an interventional procedure, Modifier 59 or XU may be needed to separately bill the diagnostic angiography; ABI (ankle-brachial index): 93922 — limited bilateral noninvasive physiologic study of upper or lower extremity arteries; 93923 — complete bilateral; 93924 — noninvasive physiologic study of extremity arteries at rest and with stress.
AV Fistula and Dialysis Access
Dialysis access creation and maintenance is a major revenue stream for vascular surgery practices serving ESRD patients: AV fistula creation: 36818 — arteriovenous anastomosis, open; by upper arm cephalic vein transposition; 36819 — by upper arm basilic vein transposition; 36820 — by forearm vein transposition; 36821 — direct, any site (e.g., Cimino type) (separate procedure); AV graft creation: 36830 — creation of arteriovenous fistula by other than direct arteriovenous anastomosis (separate procedure); 36832 — revision, open, arteriovenous fistula; without thrombectomy, autogenous or nonautogenous dialysis graft (separate procedure); 36833 — revision, open, arteriovenous fistula; with thrombectomy, autogenous or nonautogenous dialysis graft; Endovascular dialysis access maintenance: 36901 — introduction of needle(s) and/or catheter(s), dialysis circuit, including dialysis segment, all imaging and radiological supervision and interpretation required to perform the procedure, including all angioplasty within the circuit, when performed; direct puncture; 36902 — with transcatheter placement of intravascular stent(s); 36903 — with thrombectomy; 36904 — percutaneous transluminal mechanical thrombectomy and/or infusion for thrombolysis, dialysis circuit; 36905 — with transluminal balloon angioplasty; 36906 — with transluminal stent placement(s); 36907 — transluminal balloon angioplasty, central dialysis segment (add-on); 36908 — transcatheter placement of intravascular stent(s), central dialysis segment (add-on); These codes include all imaging — do not separately bill fluoroscopy or angiography S&I with dialysis access codes; Global period: 36901-36906 have a 10-day global period; procedures performed within 10 days of a prior access maintenance procedure are bundled.
Vascular Surgery Denials and RCM
Vascular surgery billing denials cluster around imaging bundling rules, global period compliance, and endovascular add-on code documentation: Common vascular surgery denial patterns: imaging S&I unbundling: billing angiographic supervision and interpretation codes (75952, 75962, etc.) separately when they are already included in the primary endovascular procedure code; the current endovascular peripheral vascular code family (37220-37235) already includes imaging — separately billing 75710 or 75962 with these codes generates NCCI bundling denials; global period violations: billing evaluation or post-op visits within 90 days of a major vascular procedure without appropriate modifiers; dialysis access 10-day global: billing a second access maintenance procedure within 10 days without Modifier 79 (unrelated procedure) or appropriate supporting documentation; EVAR without PA: most payers require prior authorization for EVAR, TEVAR, and carotid stenting; failure to obtain PA is a common high-dollar denial; Vascular surgery RCM best practices: endovascular code selection accuracy: the zone-based peripheral endovascular codes (37220-37235) require the surgeon to correctly identify the zone (iliac, femoral-popliteal, tibial) and the intervention type (PTA vs. stent) for each vessel treated; a cath lab team that completes an operative report with "PTA and stenting of the SFA" but does not specify the zone creates a coding ambiguity — operative reports should note zone-specific anatomy; vascular lab TC/PC billing: vascular surgery practices with accredited vascular labs should audit TC/PC billing — surgeons who perform and interpret their own vascular duplex studies should bill globally; studies sent to a reading cardiologist or radiologist require Modifier 26 for the interpreting physician.
FAQ
How are diagnostic angiography and interventional endovascular procedures billed when performed in the same session?
The relationship between diagnostic angiography and same-session endovascular intervention is one of the most complex billing questions in vascular surgery: The general rule — diagnostic angiography is not separately billable when: the same physician performs diagnostic angiography and then immediately proceeds to an intervention on the same vessel(s) in the same operative session; the angiography is considered the "roadmap" for the intervention and is included in the interventional procedure's payment; the new peripheral vascular intervention codes (37220-37235) explicitly state that they include imaging — when using these codes, separately billing angiography S&I codes is a bundling violation; When diagnostic angiography IS separately billable: when the diagnostic angiography results in a decision to NOT perform an intervention (the study is purely diagnostic and no intervention follows); when the intervention is performed on a different vessel than the diagnostic study (e.g., angiography of the aortoiliac tree to evaluate a potential problem, followed by intervention on a different zone — the diagnostic study of the non-intervened vessel may be separately billable); when the diagnostic angiography is performed at a separate session from the intervention; Use of Modifier 59 or -XU: when separately billing diagnostic angiography with an intervention under circumstances where separate billing is justified, Modifier 59 (distinct procedural service) or Modifier XU (unusual nonoverlapping service) may be appended to the angiography code to indicate the services are distinct; however, these modifiers do not override NCCI edits — only a column 2 edit indicator of "1" (can be bypassed with a modifier) allows use of these modifiers; the vascular surgeon must confirm the edit type before applying the modifier; Operative report documentation: when claiming separate billing for diagnostic angiography plus intervention, the operative note must clearly describe the distinct medical necessity for the diagnostic study as a service separate from the intervention decision — not just as pre-procedure imaging.
What is the correct billing approach for a vascular surgeon who creates an AV fistula and subsequently performs maintenance interventions on it?
AV access creation and the subsequent maintenance procedures represent a longitudinal billing relationship with specific global period and code selection considerations: Creation phase: AV fistula (native) creation: 36821 (direct anastomosis, Cimino type) or 36818-36820 (transposition procedures); global period: 90 days for 36818-36821; routine maturation monitoring visits within 90 days are included in the creation code's global payment; AV graft (synthetic) creation: 36830 or 36832; global period: 90 days; Post-creation monitoring (not billable within global): physical examination and monitoring of fistula maturation is included within the 90-day global period; duplex ultrasound for fistula mapping/maturation: 93990 — duplex scan of hemodialysis access, including both complete evaluation of dialysis access inflow, outflow, and body of access; separately billable from the surgical global package if the fistula appears mature and the study is for a distinct diagnostic purpose; verify payer policy; First intervention after global period expires: once outside the 90-day global period, the first intervention on the fistula (e.g., PTA for a stenosis, thrombectomy for a clot) is billed using the 36901-36906 code family based on the type of intervention; 10-day global period for these codes; Subsequent interventions within 10 days: if a second intervention is required within 10 days of a prior access maintenance procedure (e.g., repeat thrombectomy for re-thrombosis): this falls within the 10-day global of the prior procedure; separately billable only if the new intervention is for a different, unrelated problem (Modifier 79) or if the re-intervention is for a complication that requires return to the operating room (Modifier 78); Frequency of dialysis access procedures: CMS has established utilization guidelines for dialysis access procedures; access procedures performed more than 3-4 times per year per patient may be reviewed for medical necessity; documentation of clinical necessity (flow rates, access pressures, duplex findings) supports the frequency of intervention.
Vascular Surgery Revenue Cycle That Captures Every Intervention Component
Valiant Lifecare's vascular surgery billing specialists manage endovascular zone-based code selection, imaging S&I bundling rules, EVAR and carotid stenting prior authorization, AV access creation and maintenance billing, global period compliance, and the full spectrum of vascular surgery denial prevention — ensuring your practice captures the full value of every open and endovascular procedure.
Optimize Your Vascular Surgery Revenue Cycle