Electrophysiology is one of the fastest growing subspecialties in cardiology, and the growth is no longer staying inside hospital walls. At UI Health in Iowa City, Iowa, three electrophysiologists performed about 900 procedures a year in 2023. In 2026, nine of them perform more than 3,200, with three more physicians on the way. Patients there still wait 60 to 90 days for a slot.
That volume is starting to move to a lower cost setting. CMS has approved electrophysiology ablation for the ambulatory surgery center, a shift a scientific statement in the Journal of the American College of Cardiology compared to the migration interventional cardiology went through after Medicare expanded ASC coverage for cardiac catheterization and percutaneous coronary intervention in 2020. The direction of travel is clear. The economics are less forgiving.
Here is the tension cardiology leaders are now living with. The clinical case for outpatient cardiac care is strong and the demand is real. But outpatient margins are thin, device costs are heavy, and the gap between a profitable case and a loss can come down to how cleanly the claim is coded and collected. When the procedure moves, the revenue cycle has to move with it.
Key Takeaways
Single specialty cardiology ASCs grew from 55 in 2018 to 221 in 2023, roughly 4% of all Medicare certified ASCs, and cardiovascular ASC volume is projected to grow another 15% between 2023 and 2028.
A KNG Health report for the Ambulatory Surgery Center Association projects cardiovascular ASC savings will climb from $390 million in 2025 to $1.57 billion in 2034, a 302% increase and the fastest growing procedure category in that analysis.
Margins are tight. One physician owner reported profit margins near 15%, and a single disposable imaging catheter for atrial fibrillation ablation can run $2,000 to $3,500 per case.
Access is part of the story. A 2024 study found nearly half of U.S. counties have no practicing cardiologist, rising to 86% of rural counties and affecting about 22 million people.
Barriers remain. About half of states still have certificate of need laws that restrict complex cardiac procedures, and outfitting one cardiovascular ASC procedure room can cost more than $1.5 million.
Why Is Cardiology Moving Into the ASC Now?
The pull is coming from several directions at once. Procedure demand is climbing, the workforce is stretched, and Medicare has opened the door to the outpatient setting. Between 2018 and 2023 the number of single specialty cardiology ASCs nearly quadrupled, from 55 to 221. Health systems are treating outpatient cardiology as a strategic priority rather than a reaction to policy. One health system strategy officer framed the move as part of an affordability push, not something the organization is waiting on legislation to force.
Access sharpens the case. A 2024 study in the Journal of the American College of Cardiology found that nearly half of U.S. counties have no practicing cardiologist. In rural areas the gap is worse, with 86% of counties lacking one and roughly 22 million Americans affected. Moving procedures to freestanding centers closer to patients is one way to close that distance.
How Big Could the Shift Get?
The ceiling looks high. Cardiac catheterization currently accounts for just 0.2% of ASC procedure volume. Cataract surgery, the closest mature example of a site of care shift, accounts for 18%. That gap is the runway. A KNG Health report for the Ambulatory Surgery Center Association projects cardiovascular ASC savings will grow from $390 million in 2025 to $1.57 billion in 2034, a 302% increase that would make it the fastest growing procedure category in the analysis. Electrophysiology looks poised to follow interventional cardiology down the same path.
Why Are the Margins So Tight?
Growth and profit are not the same thing. Amanda Ryan, DO, an interventional cardiologist who owns a center in Carlsbad, N.M., was blunt about it. The revenue numbers can look high, she said, but the costs are substantial, and a case can go negative quickly if anything moves beyond routine. Even with standard equipment she put profit margins around 15%. Workable, but slim.
Disposable devices are a big part of that math. A single imaging catheter long considered standard for atrial fibrillation ablation can cost $2,000 to $3,500 per case. One electrophysiologist in Virginia Beach, Va., rebuilt his workflow around a reusable probe instead, and a feasibility study of 128 patients recorded a 100% acute success rate with no major complications. The lesson is not about one device. It is that in this setting, cost control is not optional.
What Does This Mean for the Revenue Cycle?
When margins are this thin, the revenue cycle stops being back office work and becomes the difference between a case that pays and a case that does not. A denied claim on a high cost cardiac procedure is not a rounding error. Neither is a coding mistake that undervalues the work or invites an audit. In the hospital, wider margins absorbed a lot of that friction. In the ASC, there is far less cushion.
Three things carry outsized weight. Payer contracts have to be negotiated for the outpatient setting and the specific codes moving into it, not inherited from a hospital agreement. Coding has to be precise, because new and revised cardiovascular codes keep arriving as CMS expands the covered procedures list. And prior authorization has to be tracked payer by payer, because a delayed authorization on a scheduled ablation stalls both the procedure and the payment.
What Should Cardiology Leaders Do Before Expanding?
The centers best positioned for this shift tend to share one habit. They know their own case economics before a payer or a policy tells them what those economics should be. That means tracking cost per case against contracted rates, not just charges. It means modeling reimbursement for each procedure a center plans to bring in house, device and supply load included. And it means building billing and collections capacity to match the clinical ambition before the volume arrives, rather than scrambling after the first denials land. Certificate of need laws and a procedure room that can cost more than $1.5 million already raise the stakes on getting the financial side right.
What This Means for Your Practice
The move of cardiac procedures into the ASC is one of the clearest growth stories in specialty care right now. It is also one of the least forgiving. The clinical demand is proven, the cost savings are real, and the reimbursement is there for centers that capture it cleanly. The risk is that thin margins punish any slack in the revenue cycle. A single specialty cardiology ASC cannot bill the way a hospital outpatient department did and expect the same result.
That is the work Cosentus does. We build revenue cycle strategy around the pressures specific to cardiology and ambulatory surgery centers, from payer contracting and coding accuracy to prior authorization and underpayment recovery. Cosentus serves orthopedics, wound care, pain management, anesthesia, behavioral health, ASCs and cardiology, with the revenue cycle built around each specialty's economics.
Frequently Asked Questions
Why is electrophysiology moving into the ASC?
Demand for cardiac procedures is rising, the workforce is stretched, and CMS has approved electrophysiology ablation for the outpatient setting. A scientific statement in the Journal of the American College of Cardiology likened the shift to the earlier migration of interventional cardiology after Medicare expanded ASC coverage for cardiac catheterization and PCI in 2020.
How large is the opportunity?
Cardiac catheterization is only 0.2% of ASC procedure volume today, against 18% for cataract surgery, which suggests significant room to grow. A KNG Health report for the Ambulatory Surgery Center Association projects cardiovascular ASC savings will rise from $390 million in 2025 to $1.57 billion in 2034.
Why are outpatient cardiac margins so thin?
Device and supply costs are high relative to the payment. One physician owner reported margins near 15%, and a single disposable catheter for atrial fibrillation ablation can cost $2,000 to $3,500 per case. Small revenue cycle errors erase profit quickly.
What does the revenue cycle need to look like for a cardiology ASC?
Payer contracts negotiated for the outpatient setting, precise coding as CMS updates cardiovascular codes, disciplined prior authorization tracked by payer, and fast underpayment recovery. Clean capture on every case is what protects the margin.
Where can we get help modeling this for our center?
Cosentus builds revenue cycle strategy around specialty specific economics for cardiology and ASCs. Reach the team at cosentus.com/contact or +1 (877) 266 9040.
Talk to Cosentus
Cardiology's move into the surgery center will reward the centers that treat billing as carefully as they treat patients. If you are bringing cardiac procedures into your ASC, or planning to, talk to Cosentus about a revenue cycle built to protect the margin. Visit cosentus.com/contact or call +1 (877) 266 9040.