The ambulatory surgery center market
There are 14,030 ambulatory surgery centers across 55 US states and territories in our current snapshot, and 50,000 surgeons linked to them. The ASC industry is concentrated in a handful of states and a handful of specialties: eyes, endoscopy, pain, and orthopedics carry most of the volume. What follows is what the facility data actually shows, and what it cannot tell you.
Where the centers are
The top three states hold 37% of all ASCs between them. Concentration follows population, though not exactly: state certificate-of-need rules change how many centers a market can support, which is why comparable states can sit far apart on this list.
| State | ASCs | Share |
|---|---|---|
| California | 2,367 | 16.9% |
| Texas | 1,829 | 13.0% |
| Florida | 968 | 6.9% |
| Arizona | 705 | 5.0% |
| Georgia | 596 | 4.2% |
| Maryland | 580 | 4.1% |
| New York | 559 | 4.0% |
| Pennsylvania | 552 | 3.9% |
| New Jersey | 455 | 3.2% |
| Ohio | 397 | 2.8% |
What ASCs actually perform
Specialty mix is where the ASC industry differs most from the hospital outpatient department it takes cases from. These counts cover the 5,175 centers where we can establish a procedure mix from facility-fee evidence, not all 14,030, and a center that does both eyes and GI appears in both rows.
| Specialty family | Centers |
|---|---|
| Ophthalmology | 2,003 |
| Pain management | 1,982 |
| Gastroenterology | 1,876 |
| Orthopedics | 1,381 |
| Urology | 452 |
| Podiatry | 355 |
| ENT | 280 |
| General surgery | 274 |
What is driving ASC growth
Site-of-service migration. Procedures keep moving out of hospital outpatient departments into ambulatory settings, because the same case costs materially less to perform in an ASC. Every payer with a stake in total cost of care has an interest in that shift continuing.
Payer steerage. Plans do not merely permit the ASC setting, they route toward it through benefit design and network strategy. That turns a clinical preference into predictable volume.
Surgeon economics. Ownership, scheduling control, and block time are things a hospital rarely offers and an ASC routinely does. Recruiting follows that, and volume follows recruiting.
Technique and anesthesia advances. Cases that once required an inpatient stay, particularly in orthopedics and spine, are now same-day procedures. Each such shift expands what the ASC market is allowed to contain.
Consolidation, running the other way. Management companies, health system joint ventures, and private-equity platforms keep acquiring independents. Facility count and owner count move in opposite directions, so a growing market can hold shrinking independence.
What these numbers do not tell you
- This is a point-in-time snapshot of facilities, so it supports counts and distribution. It does not support growth rates or year-over-year change, which is why you will find no CAGR on this page.
- Market size here is measured in centers, not dollars. Revenue estimates swing widely depending on whether they include professional fees, anesthesia, and implants alongside the facility fee.
- Specialty counts cover the 5,175 centers with usable procedure evidence. They are not shares of all 14,030 ASCs, and a multi-specialty center appears in more than one family.
- 5,110 centers carry a Medicare certification number in this snapshot. Read the remainder as "no CCN matched", which is not the same as "not certified".
- Ownership and case volume are deliberately absent. We publish facility identity and relationships here; commercial rates, volumes, and independence signals live inside the product.
Questions about the ASC market
How big is the ambulatory surgery center market?
Measured by facilities rather than dollars, our current snapshot holds 14,030 ambulatory surgery centers across 55 US states and territories. Facility counts are the most concrete way to size the ASC industry, because revenue estimates vary widely depending on whether they count facility fees only, professional fees, or anesthesia and implants alongside them.
Which states have the most ASCs?
California, Texas, and Florida hold the largest number of ambulatory surgery centers, followed by Arizona, Georgia, and Maryland. Concentration tracks population, but not perfectly: state certificate-of-need rules materially change how many centers a market supports, which is why some large states sit lower than their population would suggest.
What procedures do ASCs actually perform?
Among the 5,175 centers where we can establish a procedure mix from facility-fee evidence, the largest specialty families are ophthalmology, pain management, gastroenterology, and orthopedics. Those four carry the bulk of ASC volume, which is why the ASC market is often described as a cataract, endoscopy, injection, and joint business.
What is driving ambulatory surgery center growth?
Four forces: procedures continuing to migrate out of hospital outpatient departments into lower-cost settings, payers actively steering cases toward ASCs, surgeons seeking ownership and scheduling control that hospital employment does not offer, and technique advances that make more complex cases, particularly in orthopedics and spine, safe to perform same-day.
Is the ASC industry consolidating?
Yes. Management companies, health system joint ventures, and private-equity-backed platforms have been steadily acquiring independent centers, so the number of facilities and the number of owners move in different directions. A market can add centers while the count of independent operators falls.
Keep going: ASC directory · surgeon directory · ASC CPT codes · payer intelligence