The ASC Windfall—The Anesthesia Shortfall

The Centers for Medicare & Medicaid Services (CMS) is proposing a 2.4% ambulatory surgical center (ASC) payment increase for 2027. If outpatient surgery is worth investing in, should the anesthesia required to deliver it share in the benefit?  Here’s a snapshot of what we’re looking at: 

• ASC PAYMENT: ▲ 2.4% proposed increase 

• ANESTHESIA CONVERSION FACTOR: ▼ 1.68% proposed decreased 

In other words, we have different payment systems and different recipients, while having the same patient, the same procedure and the same operating room. And that creates an important question: if Medicare and commercial payers benefit from the continued migration of cases to ASCs, who is investing in the anesthesia capacity that makes that growth possible? 

For calendar year (CY) 2027, CMS proposes a 2.4% update to ASC rates for centers meeting relevant quality-reporting requirements. At the same time, the proposed Medicare Physician Fee Schedule would reduce the non-qualifying APM conversion factor from $33.40 to $32.84, a 1.68% decrease. These are not apples-to-apples reimbursement measures. One pays the facility while the other applies to professional services. But that distinction is exactly why the contrast deserves attention. 

Outpatient surgery continues to expand because ASCs can deliver efficient, lower-cost care. Yet every case that migrates out of the hospital brings an unavoidable requirement with it: anesthesia. Anesthesiologists and CRNAs must still be recruited, credentialed, scheduled and retained; and rooms must be covered despite cancellations, schedule gaps, late starts and early finishes. Those costs do not decline simply because the site of service changed. 

The Question: Who Funds the Gap? 

When professional collections do not support the reasonable cost of reliable anesthesia coverage, the shortfall does not disappear. Someone in the surgical ecosystem has to absorb it. 

Medicare could pay anesthesia more per unit, recognizing the cost of maintaining the workforce necessary to support outpatient migration. The ASC could provide greater financial support, particularly when dependable anesthesia coverage allows it to keep rooms open and generate facility revenue. 

Commercial payers should also be part of that equation. 

Commercial insurers can realize significant savings when appropriate procedures move from hospital outpatient departments to ASCs. A Blue Cross Blue Shield analysis of 123 million members found that prices for common procedures performed in hospital outpatient departments (HOPDs) were substantially higher than in ASCs or physician offices—in some cases, as much as five times higher. That creates a compelling question: if an anesthesia group helps make a lower-cost site of service possible, should some of those savings be reflected in its anesthesia unit value? 

There is already precedent for the concept. Blue Cross Blue Shield of Texas offers increased reimbursement of 15% to 50% for certain qualifying commercial outpatient surgical services performed in an in-network ASC, specifically aligning provider incentives with the lower-cost setting. The program is not anesthesia-specific, but the principle is important: a payer can pay a provider more for supporting ASC migration while still reducing the overall cost of care. 

For anesthesia groups, that changes the commercial contracting conversation. Instead of negotiating solely around rising provider compensation and staffing costs, groups can demonstrate the total cost of care they help the payer avoid by maintaining reliable ASC coverage. 

The solution may ultimately require all three: (a) stronger Medicare reimbursement, (b) higher negotiated commercial anesthesia rates, and (c) facility support when professional collections still cannot cover the reasonable cost of staffing. 

The Anesthesia Hour is Becoming the Scarce Resource 

Case volume alone cannot determine whether an ASC relationship is economically sustainable. Anesthesia leaders need to understand payer mix, revenue per hour, actual operating room utilization, cancellations, staffing costs, the effect of flip rooms and cases performed after scheduled hours. A schedule may appear to be busy while still stranding expensive clinical capacity. 

The same analysis matters to the ASC. If professional revenue from its cases cannot reasonably support the anesthesia coverage required to perform them, the facility has an economic interest in helping solve the problem. 

An anesthesia coverage problem quickly becomes an ASC capacity problem. 

Follow The 2.4% — And Follow The Savings 

The proposed ASC update certainly does not mean every center suddenly has another 2.4% available to hand to anesthesia. Payment varies by procedure, geography, payer mix and operating costs. But it does create a timely reason to ask a larger question about how the economics of outpatient surgery are distributed. 

For commercial payers, the argument may be even more direct. Commercial claims research has estimated $37.8 billion in annual savings from procedures already being performed in ASCs rather than hospital outpatient departments. More recent Blue Cross Blue Shield data likewise shows substantial site-of-service price differences across thousands of outpatient services. 

Those savings create negotiating leverage. 

If a commercial payer saves hundreds or even thousands of dollars by having a case performed in an ASC instead of an HOPD, increasing anesthesia reimbursement by a fraction of that savings may still leave the payer with a significantly less expensive episode of care. That could mean negotiating a higher anesthesia conversion factor or other ASC-specific reimbursement arrangement for commercial cases when the economics support it. 

Perhaps Medicare needs to reconsider what it pays anesthesia per unit. Perhaps commercial carriers should share some of the savings created by lower-cost sites of service with the anesthesia groups necessary to make those sites viable. Perhaps ASCs benefiting from stronger facility economics need to reconsider what they contribute toward anesthesia coverage when professional collections fall short. 

Perhaps all three need to happen. 

The Bottom Line 

If we’re willing to invest more in where surgery happens, shouldn’t we also invest in the anesthesia providers who make it possible? 

An outpatient growth strategy cannot indefinitely reward the setting or allow payers to capture the savings from that setting, while expecting anesthesia groups to absorb the widening difference between professional reimbursement and the actual cost of providing capacity. 

An ASC can add cases. It can recruit surgeons. It can build operating rooms. 

But without anesthesia, it can’t open them.