US Ambulatory Surgery Centers
U.S. · 6,663 locations
There are 6,663 Ambulatory Surgery Centers in the US as of October 2026. They are in all 50 states, DC and Puerto Rico. California has the most, with 933.
All 6,663 Medicare-certified ambulatory surgery centers in the United States, with CMS Certification Number, street address, phone and ownership.
More about this list
ASCs are where an increasing share of US surgical volume has moved as procedures shift out of hospitals, which makes them the fastest-growing buyer group in medical devices, surgical supplies, sterilisation, anaesthesia and practice-management software. They are also intensely consolidated by physician groups, hospital systems and private equity, so mapping the universe is the first step in any roll-up or partnership strategy. Because these are federally certified, the file is authoritative and the certification number joins to CMS quality and utilisation data. Refreshed weekly.
#Count report
By state
These states add up to 6,632 of the 6,663 locations.
Need just some of them? Ask in your own words.
●Where the rows are
≡Sample Data Preview
| name | address | city | state | zip | phone | facility type | sub type | ccn | ownership | beds | certified date | county | geo precision | county fips | county note | address quality | source url | latitude | longitude |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alaska Cardiovascular Surgery Center | 3220 Providence Drive, Suite E3-083 | Anchorage | AK | 99508 | (907) 264-5772 | ambulatory surgery center | other | 02C0001016 | Proprietary | 1 | 04/19/2019 | Anchorage Municipality | address | 02020 | complete | https://data.cms.gov/sites/default/files/2026-08/9f345e2d-5199-4630-a08b-9b45581a9a2a/POS_iQIES.DATA.Q2_2026.csv | 61.189789 | -149.818629 | |
| Center For Spine Interventions Asc 3, LLC | 4450 Calibre Crossing Suite 1120 | Acworth | GA | 30101 | (678) 813-2741 | ambulatory surgery center | pain | 11C0001478 | Proprietary | 1 | 01/30/2018 | Cobb County | address | 13067 | ZIP 30101 spans 4 counties; assigned to the county holding 68% of its land area | complete | https://data.cms.gov/sites/default/files/2026-08/9f345e2d-5199-4630-a08b-9b45581a9a2a/POS_iQIES.DATA.Q2_2026.csv | 34.062970 | -84.721847 |
| Mid-Atlantic Surgery Pavilion | 1111 Beards Hill Road, Ste 700 | Aberdeen | MD | 21001 | (410) 273-9096 | ambulatory surgery center | ophthalmology | 21C0001432 | Proprietary | 1 | 11/21/2019 | Harford County | zip_centroid | 24025 | complete | https://data.cms.gov/sites/default/files/2026-08/9f345e2d-5199-4630-a08b-9b45581a9a2a/POS_iQIES.DATA.Q2_2026.csv | 39.504488 | -76.201049 | |
| Coastal Endoscopy Center | 175 Gunning River Road Bldg A Unit 4 | Barnegat | NJ | 08005 | (609) 698-0700 | ambulatory surgery center | endoscopy | 31C0001261 | Proprietary | 1 | 10/06/2021 | Ocean County | address | 34029 | complete | https://data.cms.gov/sites/default/files/2026-08/9f345e2d-5199-4630-a08b-9b45581a9a2a/POS_iQIES.DATA.Q2_2026.csv | 39.754389 | -74.238331 | |
| Avera Endoscopy/Surgical Center | 310 S Penn St, Suite 201 | Aberdeen | SD | 57401 | (605) 725-3636 | ambulatory surgery center | endoscopy | plastic | other | 43C0001018 | Government | 3 | 05/08/2013 | Brown County | address | 46013 | complete | https://data.cms.gov/sites/default/files/2026-08/9f345e2d-5199-4630-a08b-9b45581a9a2a/POS_iQIES.DATA.Q2_2026.csv | 45.469141 | -98.476328 |
{}What's in each row
| Field | What it is | Rows filled |
|---|---|---|
| name | Business or facility name | 100% |
| facility | Facility type | 100% |
| sub | Sub type | 93% |
| ccn | Ccn | 100% |
| address | Street address | 100% |
| city | City | 100% |
| state | Two-letter state code | 100% |
| zip | ZIP code | 100% |
| phone | Phone number where published | 100% |
| ownership | Ownership | 100% |
| beds | Beds | 100% |
| certified | Certified date | 100% |
| county | County the location is in | 100% |
| source | The public source this row came from | 100% |
| latitude | GPS latitude where published | 100% |
| longitude | GPS longitude where published | 100% |
| geo_ | How exact the map point is: the source's own point, the street address, or the ZIP code's centre | 100% |
| county_ | Five-digit federal code of that county | 100% |
| county_ | How the county was found, where it was not given by the source | 19% |
| address_ | Whether the street address is complete, missing a house number, or a PO box | 100% |
Rows filled is measured on every row of the delivered file.
✓Where this data comes from
Each row names the public source it came from, so any record can be checked against where it was published.
October 18, 2026
File built · Rebuilt weekly on an automatic schedule.
20 fields
Columns in the file
Fill measured
On every row of the delivered file
How we build and date every file: methodology.
Using ChatGPT, Claude or an API?
No setup needed. Ask ChatGPT or Claude your question about the US Ambulatory Surgery Centers and give it this page: it can open https://locationlists.com/find?dataset=surgery-center-list with the filters you need and show you the count and price.
Using ChatGPT or Claude? Tell it to answer from locationlists.com/find — no account, no connector.
How assistants ask
No connector needed. Any AI assistant can answer from this site with a web link, no connector, no account: open https://locationlists.com/find with the question as query parameters.
If a question needs filtering, distance, drive time, combining lists or a price, open a /find link: either put the question itself in q=, or build the structured link. The answer does not need an API, a connector or an account.
Simplest, the question itself: https://locationlists.com/find?q=<the question in plain words>
Or set the parts yourself: https://locationlists.com/find?dataset=<slug>&state=<ST>&city=<city>&county=<county>&zip=<zip>&near=<place or zip>&radius=<miles>&drive=<minutes>&where=<column>:<op>:<value>&total=<rows>
Leave out what the question does not need. Use radius for straight-line miles or drive for minutes of driving (5 to 60), not both; near can name several places separated by | to reach from any of them. To ask about several lists at once, use datasets with two or more names, or category with a kind of business. To compare two lists, add relate=nearest and the other list with b. in front of its parameters. To count by area, use areas=county (or zip, state, metro). To keep only places whose county, ZIP code, metro area or state meets a Census figure, add area_where (for example county:population>1000000); with areas, per=100000 gives counts per 100,000 residents.
Links an assistant can open, each showing how many rows match, a few preview rows and the price for just that part:
- The whole list: add a city, state, ZIP code or distance:
https://locationlists.com/find?dataset=surgery-center-list
Optional: connect for repeat use or wallet payments:
Read https://locationlists.com/skill.md and follow the instructions to connect LocationLists. Then show me the US Ambulatory Surgery Centers list.Your assistant will walk you through setup and show you the price before you pay.
For developers
Every step below has a no-connector equivalent: https://locationlists.com/find?dataset=surgery-center-list with the same filters as query parameters.
- Connect your agent to
https://locationlists.com/mcp(no key, no signup). - Call
count_locationswithdataset: "surgery-center-list"and any filter — it is free, and returns how many rows match and what they cost. - Fetch the rows with
query_locations: $1.19 per 100 rows from this dataset. Above 3,332 rows, buying the whole file is cheaper.
Paid in USDC over x402 — the agent gets an HTTP 402 with the exact price, signs, and retries. Money moves only after rows are delivered, so a failed or empty query costs nothing. Setup for Claude, Cursor and VS Code
?Frequently Asked Questions
How many Ambulatory Surgery Centers are there in the US?
There are 6,663 Ambulatory Surgery Centers in the US as of October 2026. They are in all 50 states, DC and Puerto Rico. California has the most, with 933.
How is an ASC different from a hospital outpatient department?
An ASC is a freestanding, separately certified facility, whereas a hospital outpatient department bills under the hospital. They are certified differently, reimbursed differently and bought from differently, and only the freestanding ASCs are in this file.
Does it show physician or corporate ownership?
The ownership type CMS records is included. Deeper ownership, such as which management company or physician group controls a center, is not in the federal file; that is a custom enrichment we can quote.
Why does this matter more than it used to?
Payers and Medicare have steadily moved procedures to the ASC setting because it is cheaper, so surgical volume and therefore purchasing has followed. A device or supply company selling only into hospitals is now missing a large and growing share of its market.