661 Medicare-certified surgery-centers across 192 cities
661
Total Surgery Centers
192
Cities Covered
661
Medicare Certified
4.1 ★
Avg Google Rating
California has 661 Medicare-certified ambulatory surgery centers (ASCs) across 192 cities and towns. ASCs are outpatient facilities where patients undergo same-day surgical procedures and return home the same day — no overnight hospital stay required. 446 of these centers hold independent accreditation from organizations like AAAHC, AAAASF, or The Joint Commission. 300 centers have CMS CAHPS patient satisfaction survey data available.
The largest concentration of ASCs in California is in Los Angeles, with 25 centers. Use the city listings below to browse centers near you, or search by zip code for the closest options.
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California has 661 Medicare-certified ambulatory surgery centers (ASCs) across 192 cities. ASCs perform same-day outpatient surgical procedures without an overnight hospital stay.
Yes — Medicare Part B covers approved surgical procedures performed at Medicare-certified ASCs. You typically pay 20% of the Medicare-approved amount after meeting your Part B deductible. All 661 centers listed here are Medicare-certified. Contact individual facilities to confirm which specific procedures they perform and whether your insurance is accepted.
Ambulatory surgery centers are independent facilities focused exclusively on outpatient surgery. Compared to hospital outpatient departments, ASCs typically have lower patient cost-sharing (due to CMS payment rules), shorter wait times, and a more focused care environment. Studies show ASC patients also report high satisfaction and low complication rates.
This directory shows CMS CAHPS patient satisfaction scores (0–100 scale), Google ratings, accreditation status (AAAHC, AAAASF, Joint Commission), and safety metrics like hospital transfer rate and safe surgery checklist compliance. The average Google rating across rated ASCs in California is 4.1 out of 5.
ASCs in California perform procedures across many specialties including ophthalmology, gastroenterology, orthopedics, ENT, urology, pain management, and more. Use the specialty filter on the search page or browse the Procedures directory to find centers offering specific procedures.