Why 2026 Is Different From a Routine Annual Update

Most years, CPT updates are incremental a tweak here, a deleted code there. 2026 isn’t that. Across specialties, the code set added, revised, or deleted several hundred codes and cardiovascular medicine absorbed a disproportionate share of that change. The biggest shifts affecting interventional cardiology are:

• A restructured percutaneous coronary intervention (PCI) family that finally distinguishes straightforward single-vessel work from genuinely complex, multi-lesion procedures.
• A near-total replacement of the old femoropopliteal and tibial angioplasty/stent/atherectomy codes with a much larger, more granular set of lower-extremity revascularization codes.
• A brand-new code family for baroreflex activation therapy, a device-based treatment for resistant hypertension and heart failure.
• Continued reliance on Category III (temporary) codes for renal denervation, alongside a first-ever national coverage determination that changes how those claims get built.

The common thread is the same one CMS has been chasing for a few years now: the old codes didn’t reflect what was actually happening in the lab. A bifurcation lesion treated with two stents and a side-branch intervention was being reimbursed the same as a single, uncomplicated stent placement. Several of these code families were flagged under the CMS Misvalued Codes Initiative and the 2026 revisions are the result.

Diagnostic Catheterization: The Starting Point for Most Interventional Claims

Before any intervention happens, most cases start with a diagnostic catheterization and getting this part of the claim right matters just as much as the intervention itself.

The recurring billing issue here isn’t code selection it’s bundling. When a diagnostic catheterization is performed in the same session as an intervention, payers often treat the diagnostic portion as inclusive unless the documentation clearly establishes it as a separately identifiable, medically necessary service (typically supported with modifier -59 or an X-modifier). A note that simply says “diagnostic cath followed by PCI” without explaining why the diagnostic study was needed as a standalone decision-making step is a common reason these claims get bundled or denied outright.

The Core PCI Codes You’re Already Using Now Revised

The primary coronary intervention codes are still the backbone of interventional cardiology billing, but their descriptors changed in a way that affects every claim built on them:

The single biggest addition is 92930, which finally gives interventional cardiologists a way to bill for the extra time, device use and technical difficulty of true complex PCI separate lesions, bifurcation anatomy, or both main-vessel and side-branch treatment in the same session. It carries meaningfully higher work RVUs than a standard single-vessel stent code, but it isn’t automatic. Documentation has to clearly show that two distinct stents were placed without overlap and that the side branch itself was actively treated with angioplasty or stenting simply protecting a wire in the side branch doesn’t meet the threshold.

That last point is where a lot of practices will lose reimbursement they’ve technically earned, purely because the operative note wasn’t written with the new code’s criteria in mind. It’s the same issue we walk practices through on our Interventional Cardiology Billing page the code change is only half the story; documentation habits have to change with it.

Add-On Codes for Branch Vessels Are Gone Here’s What That Means

For years, additional branch-vessel work during PCI required separate add-on codes stacked on top of the primary procedure code. That’s no longer the case. The main PCI codes (92920, 92924, 92928, 92933, 92937, 92941, 92943) were revised so that typical additional branch work is now bundled into the primary code descriptor itself.

Practically, this means two things for billing teams:

1. Don’t reflexively look for an add-on code the way you did in 2025 it may not exist anymore and appending an outdated code will trigger a denial or an edit.
2. Fee schedules and payer contracts built around the old code structure need to be revisited, since the wRVU values shifted to account for the bundling.

Coronary Thrombectomy and Doppler/FFR Codes: Small Wording Changes, Real Impact

A few frequently used adjunct codes got smaller but still meaningful edits:

• 92973 (coronary mechanical thrombectomy) descriptor and guideline language was tightened to better match current thrombectomy device use in the cath lab.
• 93571 (intravascular Doppler flow/FFR measurement, initial vessel) the phrase “when performed” was added after pharmacologically induced stress, clarifying that stress induction doesn’t need to occur every time the code is reported.
• 93572 (each additional vessel studied) reported alongside 93571 when flow or FFR assessment is performed in more than one vessel during the same session.

Neither of the wording changes is dramatic on its own, but both matter for anyone doing chart audits or building payer appeal letters, since the exact language of a code descriptor is often what a denial hinges on.

IVUS Codes: Watch the Bundling Rules

Intravascular ultrasound codes 92978 (initial vessel) and 92979 (each additional vessel) remain in place for 2026, but bundling edits with certain PCI codes continue to be a common source of denied or down-coded claims. If IVUS is used to guide stent sizing or assess a complex lesion, the medical necessity and the distinct clinical purpose need to be spelled out in the note not just “IVUS performed,” but why it changed the procedural plan. This is one of the more preventable denial categories we see when reviewing claims through our Denial Management process and it’s almost always fixable with better documentation rather than a coding correction after the fact.

The Peripheral Vascular Overhaul: 46 New Codes

If PCI restructuring is the headline for coronary work, the lower-extremity revascularization overhaul is the headline for peripheral interventions. CPT deleted the old femoropopliteal and tibial-peroneal angioplasty, stent and atherectomy codes (the 37220–37235 range) entirely and replaced them with 46 new codes spanning roughly 37254–37299.

The new structure is far more granular than what it replaced:

• Separate primary codes exist for different arterial territories (femoropopliteal vs. tibial/peroneal vs. iliac).
• Distinct codes cover angioplasty alone, atherectomy alone, stenting alone and combinations of the three, rather than forcing every combination into a small handful of codes with modifiers layered on top.
• The new family better reflects the outpatient and office-based shift in peripheral vascular procedures and accounts for newer atherectomy and drug-coated balloon technology that the old codes never anticipated.
• Some newly created angioplasty-only territories don’t yet have matching atherectomy or stent codes, since the supporting clinical literature for those combinations hadn’t met CPT’s evidence threshold at the time of publication in those cases, an unlisted procedure code is still the correct path, not a workaround using an unrelated existing code.

This is a significant lift for coding teams that have relied on muscle memory for years. A practice doing a meaningful volume of peripheral work should treat this as a retraining event, not a footnote miscoding vessel territory or technique combination under the new structure is an easy way to have an otherwise clean claim rejected. It’s an area we cover in depth for clients under our Vascular Cardiology Billing Services specialty, since peripheral coding errors tend to cluster around exactly this kind of structural code change.

Non-Coronary Stenting: Renal, Iliac and Visceral Vessels

Separate from the lower-extremity overhaul, renal and visceral artery stenting keeps its own established codes 37236 (initial stent, non-coronary/non-intracranial vessel) and 37237 (each additional vessel in the same family). These are frequently referenced by payers as a valuation comparison point for newer renal denervation devices, precisely because the access, catheter work and procedural intensity are considered comparable. If your practice bills both renal artery stenting and renal denervation, it’s worth having coders who understand how payers cross-reference the two, since a mismatch in expected intensity between the two claims is an easy audit trigger.

Carotid Artery Stenting: Codes That Don’t Change Often But Get Misused Often

Carotid stenting codes are stable year to year, but they remain one of the most frequently miscoded areas in interventional cardiology billing because the code selection depends entirely on anatomy and embolic protection use, not just “a carotid stent was placed”:

• 37215 cervical carotid artery stenting with distal embolic protection
• 37216 cervical carotid artery stenting without distal embolic protection
• 37218 extracranial intrathoracic (innominate/common carotid) stenting

Both 37215 and 37216 include the ipsilateral diagnostic catheterization and angiography performed to confirm the need for stenting billing that diagnostic work separately for the treated side is a common and avoidable denial. Contralateral diagnostic imaging, if clinically performed, can generally be billed separately, but the operative note needs to distinguish clearly between the treated and untreated side.

Structural Closures Billed Under Interventional Cardiology

Several structural procedures are routinely performed and billed by interventional cardiologists rather than surgeons and they carry their own distinct documentation requirements:

• 93580 percutaneous transcatheter closure of atrial septal defect (ASD) or patent foramen ovale (PFO)
• 93581 percutaneous transcatheter closure of ventricular septal defect (VSD)

A detail that trips up a surprising number of claims: 93580 is written around congenital interatrial communication. Pairing it with a diagnosis code describing an acquired condition can trigger a coverage denial with payers who interpret the code strictly as congenital-only, even when the procedure performed is technically identical. Right and left heart catheterization performed purely to facilitate the closure is generally considered inherent to the procedure and shouldn’t be billed separately unless the catheterization served a distinct diagnostic purpose documented clearly in its own right.

Larger structural interventions TAVR, transcatheter mitral repair and left atrial appendage occlusion sit under their own code families entirely and carry National Coverage Determination requirements from CMS that go well beyond CPT selection. If your practice runs both a structural program and a general interventional practice, it’s worth treating the two as separate coding workflows rather than assuming documentation habits transfer cleanly between them. We go deeper into that side of billing on our Structural Heart Disease Billing Services page.

Pericardiocentesis: A Frequently Overlooked Interventional Code

Emergent or elective pericardiocentesis is billed under 33016–33019, depending on whether imaging guidance is used and whether a drainage catheter is left in place. These codes are often coded inconsistently between hospital-based and office-based interventional teams, largely because the clinical urgency of the procedure means documentation gets written quickly and sometimes incompletely. Stating clearly whether imaging guidance was used and whether a catheter was placed for extended drainage is what separates a clean claim from one that gets kicked back for clarification.

Baroreflex Activation Therapy: A New Code Family for 2026

One of the more overlooked additions this year is a completely new set of codes 64654 through 64659 describing baroreflex activation therapy (BAT), a device-based approach to resistant hypertension and heart failure that works through a lead implanted at the carotid sinus, tunneled to a pulse generator placed in the chest wall. The new codes separately describe initial implantation, lead-only revision or replacement and generator-only revision or replacement, with intraoperative interrogation and programming included in each rather than billed on its own.

This is a genuinely new procedure category for most billing teams and it’s worth flagging internally before the first case comes through, since there’s no prior-year claim history to model documentation or medical necessity language against.

Renal Denervation: Still a Category III Code, But With a New Coverage Pathway

Renal denervation for uncontrolled hypertension remains billed under Category III (temporary) codes 0338T for radiofrequency-based denervation and a corresponding code for the ultrasound-based approach rather than a permanent Category I code. What changed in 2026 isn’t the CPT code itself, but the coverage environment around it: CMS finalized a national coverage determination for renal denervation, covering the radiofrequency and ultrasound-based systems under a coverage-with-evidence-development framework, generally limited to CMS-approved studies rather than open-ended coverage.

Because Category III codes are carrier-priced rather than nationally valued, reimbursement varies meaningfully by Medicare Administrative Contractor and by commercial payer. Getting prior authorization and documenting medical necessity against the specific coverage criteria isn’t optional here the way it might be for an established Category I procedure it’s the difference between getting paid and not.

Documentation Habits That Actually Protect Reimbursement

New codes don’t collect on their own the operative note has to support them. A few habits matter more in 2026 than they did before:

• Name the vessel and territory explicitly. With the new peripheral code family, vague language like “lower extremity intervention” is no longer specific enough to select the correct code.
• Describe the side branch treatment, not just its presence. For 92930, the note needs to state that the side branch was actively treated (angioplasty or stent), not merely wired or protected.
• Document medical necessity for adjunct imaging. IVUS, FFR and Doppler flow codes get scrutinized closely; state why the imaging changed the procedural decision.
• Separate stent placements clearly. Complex PCI billing depends on showing that two stents were placed in distinct, non-overlapping locations.
• Match congenital vs. acquired language to the code being billed, particularly for ASD/PFO closure, where the wrong diagnosis pairing alone can sink an otherwise correct procedure code.

These aren’t new principles, but the bar for specificity moved up with this update and payers are already adjusting their edits accordingly.

CPT and ICD-10 Pairing: The Part That Gets Overlooked

A correct CPT code paired with the wrong diagnosis code is still a denial. FY 2026 introduced roughly 500 new ICD-10-CM codes across all of medicine, with a meaningful subset affecting heart failure staging, acute myocardial infarction subtypes and cardiorenal conditions diagnoses that directly drive both inpatient reimbursement and quality reporting for cardiology. Coding teams that update their CPT knowledge but don’t revisit diagnosis pairing tables at the same time tend to see denials shift from “wrong procedure code” to “medical necessity not established,” which is a slower and more expensive category of denial to fix on appeal.

Common Denial Triggers to Watch For This Year

A few patterns are already showing up as practices adjust to the new code set:

• Appending an add-on code that no longer exists for branch-vessel work on the older primary PCI codes.
• Billing 92930 without documentation meeting the two-stent, active-side-branch-treatment criteria.
• Using deleted peripheral vascular codes (37220–37235) out of habit instead of the new 37254–37299 range.
• Billing a diagnostic catheterization separately from an intervention performed in the same session, without documentation establishing it as distinct and medically necessary.
• Pairing 93580 with an acquired-condition diagnosis code instead of a congenital one, or vice versa.
• IVUS, FFR, or Doppler flow codes billed without a clearly stated clinical rationale tied to the procedure performed.

Catching these before submission rather than after a denial comes back is really the difference between a smooth revenue cycle and a backlog of appeals. That’s the core of what proactive Medical Coding Services are supposed to do: apply the current code set correctly the first time, with documentation built to match it.

Modifiers Interventional Cardiologists Still Need to Get Right

The code overhaul doesn’t change the fundamentals of modifier use, but it’s worth a refresher since new codes sometimes get billed with old habits attached:

• -59 / X{EPSU} modifiers for genuinely distinct procedural services, used carefully given how much bundling changed this year.
• -76 / -77 repeat procedure by the same or a different physician, relevant for staged interventions.
• -LT / -RT laterality, still required for peripheral and carotid vascular work.
• -26 / -TC professional vs. technical component splits, particularly relevant for imaging-heavy interventional cases.

Getting these wrong doesn’t just cause a denial it can flag a claim for a broader audit, which is a much more expensive problem to fix after the fact.

Hospital-Side Billing: HCPCS and Device-Specific Codes

Physician offices bill under CPT, but hospital outpatient departments and ambulatory surgical centers also track device-specific HCPCS Level II C-codes for items like drug-eluting stents and drug-coated balloons, which feed into OPPS and ASC payment calculations separately from the physician professional fee. Practices that split billing between a physician group and a hospital-employed or hospital-owned lab need both sides tracking the same procedural detail consistently, since a mismatch between the physician’s CPT-level documentation and the facility’s device-level coding is a common source of reconciliation headaches during audits.

Keeping the Revenue Cycle Intact Through a Coding Transition

A code set overhaul this large tends to expose weak points in a practice’s broader revenue cycle, not just its coding. Claims that used to move cleanly through a payer’s system can suddenly get held up on an edit nobody anticipated and a spike in denials in January or February often isn’t a documentation problem it’s a code-mapping problem that surfaces during Claims Submission & Tracking. Practices that treat this year’s update as an isolated coding issue, rather than something that touches Revenue Cycle Management for Cardiology end to end, tend to feel the impact longer than they need to.

At Cardiology Billing Services, this is the kind of transition year our coders spend the most time preparing for mapping old habits to new code descriptors, auditing operative notes against the new documentation thresholds and catching mismatched claims before they become denials instead of after.