CPT code 37238 – Peripheral venous stent placement

Key Takeaways

CPT code 37238 covers initial peripheral venous stent placement, open or percutaneous, for one vessel; imaging guidance is included in the code.

CPT 37239 is the mandatory add-on for each additional venous vessel stented in the same session; it cannot be reported without 37238.

Medicare coverage is governed by LCD L35998; prior authorisation requirements and medical necessity documentation are the top denial triggers.

Pabau’s claims management software submits 37238 claims electronically, flags NCCI edit conflicts, and tracks denial reasons to support appeals.

CPT code 37238: complete description and procedure overview

CPT code 37238 is defined by the American Medical Association (AMA) as covering transcatheter placement of an intravascular stent(s), open or percutaneous, including radiological supervision and interpretation, in a peripheral vein (non-coronary), initial vessel. The code belongs to the vascular surgery section of the CPT code set, alongside the companion add-on code 37239 and the arterial family (37236/37237).

The zero-day global period means pre-operative and post-operative work on the day of service is included. Separate E/M codes may still be billed on the same day when a separately identifiable service is documented, but routine post-procedure checks within the global period are not separately billable.

Clinical context for accurate coding of CPT 37238

Peripheral venous stent placement addresses obstructed or stenotic non-coronary veins – most often iliac, subclavian, or superior vena cava segments. Coders must confirm the operative note specifies a peripheral vein (not an artery and not a coronary vessel) before selecting CPT code 37238.

The procedure typically follows this sequence, which should be reflected in the documentation:

• Vascular access obtained via percutaneous puncture or open surgical exposure of the target vein
• Catheter and guidewire advanced to the lesion under fluoroscopic guidance
• Venography performed to confirm anatomy and stenosis severity
• Balloon angioplasty performed if needed prior to stent deployment (note: angioplasty is subject to NCCI bundling rules – see below)
• Self-expanding or balloon-expandable stent deployed across the lesion
• Post-deployment imaging obtained to confirm stent position and adequate flow
• Access site closed and hemostasis achieved

The operative note must identify the vein by name, state the approach (open or percutaneous), document stent type and size, and record the post-deployment imaging findings. Without these elements, payer medical reviewers will typically deny or downcode the claim.

CPT 37238 and 37239: initial vs add-on venous stent codes

CPT 37239 is the add-on code reported once for each additional peripheral vein stented beyond the first vessel treated with 37238. It cannot be reported alone and cannot be reported with an arterial stent code (37236/37237).

Key rule: counting is vessel-based, not stent-count-based. Two stents placed end-to-end in a single iliac vein still equal one vessel. Three stents across two separate venous segments (left iliac and right iliac, for example) equal two vessels: 37238 + 37239.

CPT 37238 vs CPT 37236: venous vs arterial stent placement

CPT 37236 covers arterial (non-coronary) stent placement; CPT 37238 covers venous stent placement. The distinction is clinical, not procedural – both involve transcatheter stent deployment with imaging included, but the vessel type determines the code. Using 37236 for a venous case is a misrepresentation that most payer systems will catch on review.

Both code families fall under LCD L35998. The operative note’s vessel description – “left common iliac vein” vs “left common iliac artery” – is the determinative language. Coders should never rely on the word “stent” alone to select a code without confirming the vessel type.

Codes commonly reported with CPT code 37238

Several companion codes appear routinely alongside CPT code 37238. Whether they are separately billable depends on the current NCCI edit table, which CMS updates quarterly. Always verify against the current file before billing.

IVUS (37252/37253): intravascular ultrasound is used to confirm stent sizing and apposition. When performed as a distinct diagnostic service before the treatment decision is finalised, it may be separately reportable. When used only to guide or confirm the stent already deployed, bundling is more likely. Confirm with the current NCCI policy manual.

Angioplasty (37248/37249): pre-dilation of the lesion before stent deployment is commonly performed. When performed in the same vessel at the same session, the NCCI often bundles angioplasty into the stent code. Angioplasty performed on a separate, distinct lesion in a different vessel may be separately reportable with a modifier.

NCCI edits and bundling rules for CPT code 37238

The National Correct Coding Initiative edits define which code pairs CMS considers integral to each other. When 37238 is the column-one code, several companion codes are bundled and cannot be separately billed unless a modifier applies. Pabau’s claims management software flags NCCI conflicts before submission, reducing preventable denials.

Key bundling principles for this code:

• Radiological supervision and interpretation (S&I) is bundled into 37238 – do not separately bill a fluoroscopy or S&I code for the stent deployment imaging
• Angioplasty in the same vessel at the same session is generally bundled; modifier -59 (or the X{EPSU} modifiers) may permit separate billing when the angioplasty addresses a distinctly separate lesion in a different vessel
• Modifier 50 applies when an identical procedure is performed bilaterally (for example, bilateral iliac vein stenting in a single session); CMS and most commercial payers require modifier 50 on a single line with the bilateral rate, not two separate line items
• Modifier -59 and X{EPSU} should be used only when the documentation clearly supports a distinct procedure or service; over-use of these modifiers is an audit trigger

Verify the column-one/column-two relationship in the CMS CPT/HCPCS code list and the current NCCI policy manual before billing any companion code alongside CPT code 37238.

Stop losing revenue to preventable claim denials

Pabau submits CPT 37238 claims electronically via integrated clearinghouse workflows, flags NCCI edit conflicts before submission, and tracks denial reason codes so your team can appeal faster and collect more.

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Medicare coverage and prior authorisation requirements

Medicare covers CPT code 37238 under LCD L35998 (Non-Coronary Vascular Stents), administered by regional Medicare Administrative Contractors (MACs). Coverage is not automatic – the claim must satisfy specific covered indications and documentation standards. Medical billing compliance requirements for vascular procedures are among the most closely audited in the CMS program.

LCD L35998 covered indications for venous stent placement typically include:

• Significant venous outflow obstruction confirmed by imaging (duplex ultrasound, CT venography, or venography)
• Iliac vein compression syndrome (May-Thurner syndrome)
• Superior vena cava (SVC) syndrome with documented venous stenosis or obstruction
• Failure of conservative management or prior intervention
• Symptomatic venous disease with functional impairment documented in the medical record

Prior authorisation requirements for 37238 vary by MAC region and commercial payer. They are not universal – but failing to obtain required prior auth where your MAC demands it is the single most common denial trigger for this code. Check your MAC’s LCD L35998 article and your specific payer contracts before scheduling elective cases.

Documentation required to support a CPT code 37238 claim

Understanding what makes a clean claim starts with the operative note. For 37238, payers look for seven specific documentation elements. Missing any one is enough to trigger a denial or medical review.

• Named vessel: the specific vein treated (e.g. “left common iliac vein”) – “peripheral vein” alone is insufficient
• Clinical indication: the diagnosis that establishes medical necessity, mapped to a valid ICD-10-CM code
• Approach: open surgical exposure or percutaneous access, explicitly stated
• Stent description: type (self-expanding or balloon-expandable), brand or model, diameter, and length deployed
• Imaging confirmation: post-deployment venography or fluoroscopy findings confirming stent position and patency
• Prior conservative treatment: documentation that less invasive options were tried or contraindicated
• Supervising physician attestation: the operating physician’s signature on the note, confirming their direct supervision of the procedure

For percutaneous cases, the access note should also document the puncture site and catheter trajectory. For open cases, the note should include the surgical exposure technique and wound closure method.

Common claim denial reasons for CPT code 37238 and how to avoid them

Denials for CPT code 37238 cluster around four root causes. Each has a documented remediation path, and tracking denial reason codes systematically using denial management workflows helps practices recapture revenue that would otherwise age into write-offs.

Appeals for denied 37238 claims should include the complete operative note, the pre-procedure imaging report, and the payer’s LCD L35998 coverage criteria with the relevant covered indication highlighted. Most payers have a 60-180 day appeal window from the date of the denial explanation of benefits (EOB).

Reimbursement rates for CPT code 37238

Medicare physician fee schedule (MPFS) rates for CPT code 37238 vary by geographic practice cost index (GPCI) and setting. Facility rates (hospital outpatient or ASC) are lower than non-facility rates because CMS assumes the facility absorbs overhead costs. The exact rates change annually; do not rely on historical figures for current billing decisions.

Use the CMS Physician Fee Schedule Look-Up Tool to retrieve the current year’s rates for your specific MAC locality. Enter CPT 37238, select the relevant year and MAC locality, and compare facility vs non-facility payment amounts. For RVU-based calculations, the FastRVU 2026 lookup tool shows work, practice expense, and malpractice RVU components with the Medicare conversion factor applied.

Commercial payer rates for 37238 are typically negotiated as a percentage of MPFS or using a proprietary fee schedule. They vary substantially by contract and region. Request a fee schedule extract from each commercial payer to benchmark your contracted rate against the Medicare allowable.

Practices submitting 37238 claims through Pabau can route them electronically via Claim.MD, Pabau’s integrated US clearinghouse, which validates claim data against current CMS rules before submission and returns electronic remittance advice (ERA) for automatic payment posting. You can also review medical billing fundamentals to understand how the full revenue cycle connects from charge capture through payment posting.

Conclusion

CPT code 37238 requires clean documentation, NCCI-compliant companion code selection, and proactive prior authorisation management to collect reliably. The four denial triggers – missing auth, insufficient medical necessity, bundling errors, and incorrect 37239 use – are all preventable with the right workflow checkpoints in place.

Pabau’s clearinghouse integration validates 37238 claims before they leave your system, flags edit conflicts, and tracks CARC denial codes so your billing team knows exactly where revenue is leaking.

To see how it works for vascular and interventional radiology practices, book a demo.

Continue your research

Need a framework for your broader revenue cycle? What is revenue cycle management covers the end-to-end process from charge capture to payment posting.

Want to understand how clearinghouse submissions work? 837 file guide explains the electronic claim format used for 37238 and other CPT submissions.

Looking to reduce denial rework time? Denial codes in medical billing maps common CARC codes to actionable appeal steps.

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