Interventional Radiology Billing Services

Interventional radiology billing is closer to surgical billing than to image reading. A single case can include access, a procedure, imaging guidance, and supplies, and many CPT codes already bundle the imaging in. Billing guidance separately when it is included in the procedure code is a common reason for denials.

IR practices also treat patients in hospitals, outpatient labs, and office-based suites, and each site changes who bills what. Westmont Revenue Partners connects interventional radiology groups with vetted billing experts who understand these bundling rules and can support the full revenue cycle.

Who this is for

• Interventional radiologists in private groups or hospital contracts
• Office-based labs offering vascular and dialysis access procedures
• Groups that combine diagnostic and interventional work
• Vascular and interventional centers owned by physicians
• Practices expanding into outpatient clinic visits

What gets billed

• Image-guided drainage and aspiration procedures
• Biliary and kidney drain placement
• Central venous catheter placement
• Dialysis circuit evaluation and treatment
• Embolization procedures
• Vena cava filter placement
• Tumor ablation and related treatments
• Vascular stenting and angioplasty
• Pre-procedure clinic visits and consultations
• Diagnostic imaging tied to the procedure
• Supplies, devices, and implants in office settings

Commonly billed codes

Code	Type	What it covers
36556	CPT	Central venous catheter placement, non-tunneled, age 5 or older
36902	CPT	Dialysis circuit angiography with angioplasty
32555	CPT	Chest fluid drainage with imaging guidance
49083	CPT	Abdominal fluid drainage with imaging guidance
47533	CPT	Placement of a biliary drainage catheter
50432	CPT	Placement of a kidney drainage tube, with imaging
37191	CPT	Placement of a vena cava filter, with imaging
37243	CPT	Embolization for tumors or organ ischemia
26	Modifier	Professional component only
TC	Modifier	Technical component only

Note

Codes are examples for orientation, not a complete list, and do not guarantee coverage or payment. Always check current code sets and payer policy.

Billing challenges in interventional radiology

Professional vs. technical component billing. In hospitals, the facility bills for the room, staff, and supplies, and the interventional radiologist bills for the physician work. In an office-based lab, the practice may bill globally for both. Some imaging codes that appear in IR cases can be split with modifier 26 and TC, but many procedure codes are paid as one service. Billers check the code, the site of service, and the payer rules before choosing how to bill.

• Imaging guidance bundled into the code. Many IR procedure codes include the imaging. Billing guidance separately can lead to denials. Billers check each code's descriptor and bundling edits.
• Coding families and updates. IR codes often change as procedures are combined or revised each year. Billers use specialty society coding updates and recheck templates every January.
• Multiple procedures in one session. Payers reduce or bundle when several procedures are done together. Billers apply the right modifiers only when documentation supports a separate service.
• Same-day clinic visits. An evaluation on the day of a procedure may be bundled. Billers check payer rules and use modifiers only when the visit is truly separate.
• Prior authorization. Elective procedures and devices often need approval. Billers match authorization numbers and codes to the claim.
• Office-based lab setup. These labs bill for supplies, equipment, and physician work, each with its own rules. Billers verify enrollment, site of service, and contracts.
• Documentation detail. Notes must show vessels treated, the approach, and what was done. Billers send gaps back to the clinical team for query before billing.

How Westmont can help

• Matching you with vetted billing experts experienced in interventional radiology
• End-to-end revenue cycle support, from charge capture to payment posting
• Denial management for bundling and modifier issues
• Help with credentialing and payer enrollment
• Reporting by procedure family and site of service

Frequently asked questions

Can we bill imaging guidance separately for IR procedures?

Only when the procedure code does not already include it. Many IR codes bundle imaging guidance, so adding a separate guidance code can be treated as duplicate billing. Review the code descriptor and payer edits for each case, and ask a coder when unsure.

How does billing differ for hospital and office-based IR?

In a hospital, the facility bills for equipment, staff, and supplies, and the radiologist bills for the professional work. In an office-based lab, the practice may bill for all components. Payment rules differ, so site of service must be clear on every claim.

When can we bill a clinic visit on the day of a procedure?

When the visit is significant and separate from the usual pre-procedure work, and your notes show it. Payers often bundle routine pre-procedure assessment into the procedure. A modifier may be needed, and payer policies vary.

Why do IR claims get denied for lack of medical necessity?

Common causes are weak documentation of failed conservative treatment, missing prior authorization, or a diagnosis that does not support the procedure. A biller can review the payer's policy, help your team close gaps, and appeal with the right records.

Where can we find updates to IR coding?

Specialty society coding resources publish annual updates for interventional radiology, and CMS posts fee schedule changes each year. A billing partner should review both each January and train staff on any changes that affect your procedures.

Related billing services

• Radiology Billing
• Vascular Surgery Billing
• Imaging Center Billing
• Surgical Oncology Billing
• Dialysis Center Billing