CPT code 37238 – Peripheral venous stent placement

Key takeaways

CPT code 37238 covers initial peripheral venous stent placement, open or percutaneous, for one vein. Imaging guidance and same-vessel angioplasty are 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. Missing prior authorization and thin 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 the code for transcatheter placement of an intravascular stent(s), open or percutaneous, in a peripheral vein (non-coronary), initial vein. The American Medical Association (AMA) descriptor adds “including radiological supervision and interpretation and including angioplasty within the same vessel, when performed.”

The code belongs to the vascular surgery section of the CPT code set, alongside 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. Routine post-procedure checks within the global period are not separately billable.

Clinical context for accurate coding of CPT 37238

Peripheral venous stent placement treats 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 code does not cover superficial varicose veins in the leg. Removing those through more than 20 stab incisions in one extremity is reported with CPT code 37766.

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 before stent deployment (same-vessel angioplasty is included in 37238 by CPT definition, not an NCCI edit)
• 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 and state the approach (open or percutaneous). It must also 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. The four questions below settle the code set for almost every venous stent case.

CPT 37238 vs CPT 37236: Venous vs arterial stent placement

CPT 37236 covers arterial (non-coronary) stent placement, and CPT 37238 covers venous stent placement. Both involve transcatheter stent deployment with imaging included, so the vessel type alone determines the code. Using 37236 for a venous case is a misrepresentation that payer systems routinely catch on review.

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

Codes commonly reported with 37238

Several companion codes appear routinely alongside CPT code 37238. Same-vessel angioplasty is included by definition, while IVUS depends on the current NCCI edit table. CMS updates that table quarterly, so verify it 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 finalized, 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 common. Angioplasty in the same vessel is included in 37238 by CPT’s own code definition. That bundling is permanent and never shifts with the quarterly NCCI file. Codes 37248 and 37249 apply only to angioplasty in a distinctly separate vessel, never the treated one.

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 is included in 37238 by definition and is never billed separately. Modifier 59 (or the X{EPSU} modifiers) may support 37248/37249 only when the angioplasty treats a distinctly separate vessel.
• Bilateral or multiple venous stenting (both iliac veins, for example) is reported as 37238 plus 37239, one code per vessel. Modifier 50 does not apply.
• Modifier 59 and X{EPSU} should be used only when the documentation clearly supports a distinct procedure or service. Overuse of these modifiers is an audit trigger.

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

Medicare coverage and prior authorization requirements

Medicare covers CPT code 37238 under LCD L35998 (Non-Coronary Vascular Stents), administered by regional Medicare Administrative Contractors (MACs). Coverage is not automatic, because 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 authorization requirements for 37238 vary by MAC region and commercial payer, so they are not universal. Where your MAC does demand it, a missing authorization 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 that supports a 37238 claim

Every clean claim for 37238 starts with the operative note. Payers look for seven specific documentation elements, and missing any one is enough to trigger a denial or medical review.

• Named vessel: The specific vein treated (for example, “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 denial reasons for 37238 and how to avoid them

Denials for CPT code 37238 cluster around four root causes. Each has a documented remediation path. Tracking denial reason codes through 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 and the pre-procedure imaging report. Add the payer’s LCD L35998 coverage criteria with the relevant covered indication highlighted.

Our guide to denial codes in billing maps each claim adjustment reason code to its fix. Most payers allow 60 to 180 days to appeal 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, so 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.

Our overview of medical billing fundamentals shows how that rate flows from charge capture through payment posting.

How Pabau keeps CPT 37238 claims clean before submission

Without a claims tool, a coder checks each 37238 claim by hand. They read the operative note, count the vessels, look up NCCI pairs, and confirm prior authorization. Each of those steps is a chance for a same-vessel 37239 or an unsupported 37248 to reach the payer.

Pabau routes 37238 claims electronically through its Claim.MD clearinghouse integration, which validates claim data against current CMS rules before submission. It flags NCCI edit conflicts on the claim itself. Electronic remittance advice (ERA) comes back into Pabau for automatic payment posting.

Your billing team fixes errors before the claim leaves, instead of after a denial lands. When a 37238 claim is denied anyway, Pabau records the CARC denial code against it, so the appeal starts with the reason already in hand.

Stop losing revenue to preventable claim denials

Pabau submits CPT 37238 claims electronically through its clearinghouse integration and flags NCCI edit conflicts before submission. It also tracks denial reason codes, so your team can appeal faster and collect more.

Book a demo

Conclusion

CPT code 37238 pays reliably once three facts are settled before the claim is built. The coder needs the named vein, the count of distinct veins stented, and proof that prior authorization was on file.

The trade-off worth remembering is angioplasty. In the stented vein, it is already paid for inside 37238, so a 37248 line there invites a denial and an audit flag. In a separate vein, with documentation to match, it earns its own line.

Build those checks into your pre-submission routine and most 37238 denials never happen. Book a demo to see how Pabau catches NCCI conflicts and missing claim data on venous stent claims before they reach the payer.

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.

Frequently asked questions