Interventional Radiology Billing Services
Interventional radiology (IR) billing underwent a massive overhaul with the restructuring of vascular procedure codes and the elimination of many component coding conventions. The shift from separate surgical and radiological supervision/interpretation (S&I) codes to unified codes for many vascular procedures changed how IR practices bill. But the transition was incomplete — some procedures now use single unified codes while others still require separate surgical and imaging components. Knowing which convention applies to each procedure is the foundational challenge of IR coding.
The technical/professional component split adds another layer. IR procedures involve both the interventional work (catheter placement, embolization, stent deployment) and the imaging guidance (fluoroscopy, ultrasound, CT). When the radiologist performs the procedure in their own facility, they bill both components (global). When they perform in a hospital, they typically bill only the professional component (modifier 26) while the hospital bills the technical component (modifier TC). Getting this wrong — billing global in a hospital setting or professional-only in an office-based lab — means either overpayment (audit risk) or underpayment.
Interventional Radiology billing at a glance
Common interventional radiology procedures we bill daily.
Vascular Access & Dialysis
Arterial Interventions
Venous Interventions
Interventional Radiology billing challenges we solve every day.
Interventional Radiology is one of the most complex specialties to bill. High-value procedures, strict documentation requirements, and frequent payer policy changes mean even experienced in-house billers miss revenue. For coding standards, see the Society of Interventional Radiology.
Unified vs. Component Coding Confusion
Some IR procedures migrated to unified codes (e.g., dialysis circuit interventions 36901-36906 now include imaging), while others still require separate surgical and S&I codes. Arterial embolization (37241-37244) includes imaging guidance, but certain biopsies still require separate imaging codes (+77012 for CT guidance, +77002 for fluoroscopic guidance). Using a unified code plus a separate imaging code that’s already included results in denial. Billing a procedure without its required imaging component leaves money on the table. Evolution maintains current code pairing matrices for every IR procedure to prevent both scenarios.
Catheter Selectivity and Vessel Order Coding
Diagnostic angiography billing is based on catheter selectivity — how far into the arterial tree the catheter advances. First-order (36245), second-order (36246), and third-order (36247) selections each bill separately, and bilateral catheterization bills additionally. But the coding rules differ between the aortic arch vessels (36221-36228) and non-aortic territories. Documenting “catheter advanced to the left renal artery” without specifying selectivity order results in payment at the lowest level. Evolution reviews every angiographic report for vessel order documentation and codes to the highest demonstrated selectivity.
Place of Service and Component Billing
IR physicians frequently work across settings — office-based labs, hospital outpatient departments, and inpatient operating rooms. The TC/26 split depends entirely on where the procedure is performed and who owns the equipment. In an office-based lab (POS 11), the practice bills globally. In a hospital (POS 22), the physician bills modifier 26 only. When an IR practice operates in both settings, getting the place of service wrong on even 5% of claims creates significant revenue leakage or compliance risk. Evolution validates place of service on every claim against the actual procedure location.
Multiple Intervention Same-Session Stacking
IR frequently performs multiple interventions in a single session — diagnostic angiography followed by angioplasty followed by stent placement in the same vessel, or interventions in multiple vessels. The coding hierarchy matters: diagnostic angiography may be included in the interventional code when performed in the same vessel during the same session. But angiography of a separate vascular territory is separately billable. Evolution applies the correct bundling hierarchy and modifier logic to maximize reimbursement for multi-intervention sessions without triggering NCCI edit denials.
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