America's Best Ambulatory Surgery Centers 2021

Big, busy hospitals can be lifesavers—when you need them. But when outpatient care is possible, patients often prefer ambulatory care centers: they allow you to have procedures done after business hours, and closer to home.

Ambulatory surgical centers performed more than half of all outpatient surgeries in 2017, according to Bain research, and that percentage is already expanding. Orthopedic, cardio and spinal surgeries are expected to drive the growth.

To help our readers make knowledgeable choices when they seek care for themselves or loved ones, Newsweek partnered with respected global research firm Statista to name America's Best Ambulatory Surgery Centers 2021. This list spotlights the 400 best centers in the 25 states that have the most facilities. (They are: California, Florida, Illinois, North Carolina, Texas, Colorado, Georgia, Missouri, Maryland, Michigan, New Jersey, Oregon, Pennsylvania, Louisiana, Ohio, Wisconsin, Washington, Minnesota, Arizona, Mississippi, New York, South Carolina, Indiana, Kansas and Tennessee.)

Our experts and our survey-participants assessed quality of care, performance data and peer recommendations relative to in-state competition. they also took into account how well facilities were responding to the threat of COVID-19.

Even after you've decided to undergo a procedure, it can be stressful to choose a facility. Your health, safety and quality of life are important to you—and to everyone who cares about and depends on you. We hope these trustworthy, carefully vetted rankings of America's Best Ambulatory Surgery Centers help you make choices with confidence.

BASC 2021 Nancy Cooper Signature
1Sutter Health - Surgery Center Palo Alto92.0%Palo AltoCalifornia
2Surgical Care Affiliates - University Ambulatory Surgery Center90.6%San DiegoCalifornia
3Surgical Care Affiliates - UCSD Center for Surgery of Encinitas89.8%EncinitasCalifornia
4UCLA Health - Ambulatory Surgery Center Westwood89.6%Los AngelesCalifornia
5Cedars Sinai - 90210 Surgery Medical Center86.4%Beverly HillsCalifornia
6Sutter Health - Surgery Center Mountain View86.2%Mountain ViewCalifornia
7Surgical Care Affiliates - Surgical Center of San Diego85.7%San DiegoCalifornia
8436 Beverly Hills Surgery Center85.1%Beverly HillsCalifornia
9Sutter Health - Surgery Center Fremont84.9%FremontCalifornia
10Surgical Care Affiliates - MemorialCare Surgical Center Laguna Woods 84.1%Laguna HillsCalifornia
11Surgical Care Affiliates - North Coast Surgery Center83.9%OceansideCalifornia
12Hoag Endoscopy Center83.9%Newport BeachCalifornia
13Surgical Care Affiliates - San Diego Endoscopy Center83.3%San DiegoCalifornia
14Surgical Care Affiliates - Barranca Surgery Center82.6%IrvineCalifornia
15Sutter Health - Fort Sutter Surgery Center82.3%SacramentoCalifornia
16Scripps - Encinitas Surgery Center82.2%EncinitasCalifornia
17Scripps - Mercy Surgery Pavilion81.9%San DiegoCalifornia
18Surgical Care Affiliates - MemorialCare Surgical Center at Orange Coast81.8%Fountain ValleyCalifornia
19Surgical Care Affiliates - MemorialCare Surgical Center Saddleback 81.7%Laguna HillsCalifornia
20Sutter Health - Surgery Center San Carlos81.3%San CarlosCalifornia
21Surgical Care Affiliates - Outpatient Surgery Center of La Jolla81.0%La JollaCalifornia
22Newport Beach Surgery Center80.7%Newport BeachCalifornia
23Advanced Eye Medical Group - Dr. Ghosheh Advanced Eye Medical80.4%Mission ViejoCalifornia
24Surgical Care Affiliates - Inland Surgery Center80.4%RedlandsCalifornia
25Surgical Care Affiliates - Grossmont Surgery Center80.2%La MesaCalifornia
26Hoag Orthopedic Institute - Main Street Specialty Surgery Center80.1%OrangeCalifornia
27Premier Surgery Center80.0%ConcordCalifornia
28Huntington Ambulatory Surgery Center80.0%PasadenaCalifornia
29Mid Valley Surgery Center79.2%OntarioCalifornia
30United Gastrodiagnostics - Orange - Gastroenterology79.1%OrangeCalifornia
31Fremont Surgery Center78.8%FremontCalifornia
32Eye Surgery Center of San Francisco78.6%San FranciscoCalifornia
33Valley Surgery Center78.5%ModestoCalifornia
34Crown Valley Outpatient Surgical Center78.4%Mission ViejoCalifornia
35Southern California Medical Gastroenterology Group - Santa Monica78.2%Santa MonicaCalifornia
36La Peer Surgery Center78.2%Beverly HillsCalifornia
37Sutter Health - Santa Rosa Surgery and Endoscopy Center77.9%Santa RosaCalifornia
38Sutter Health - North Bay Regional Surgery Center77.8%NovatoCalifornia
39Watsonville Surgeons Group - Central Coast Surgery Center77.7%FreedomCalifornia
40Sutter Health - Sierra Surgery Center77.6%RosevilleCalifornia
41Specialty Surgical Center of Arcadia77.5%ArcadiaCalifornia
42NSC Management Company - Endeavor Surgical Center77.5%NorthridgeCalifornia
43Carlsbad Surgery Center77.3%CarlsbadCalifornia
44Sutter Health - Capitol City Surgery Center77.3%SacramentoCalifornia
45Cedars Sinai - Endoscopy Center77.2%Beverly HillsCalifornia
46Sutter Health - Auburn Surgery Center77.0%AuburnCalifornia
47Forest Surgery Center77.0%San JoseCalifornia
48Sutter Health - Santa Barbara Endoscopy Center77.0%Santa BarbaraCalifornia
49Associated Gastroenterology Medical Group - Endoscopy Center76.9%AnaheimCalifornia
50Surgical Care Affiliates - San Luis Obispo Surgery Center76.9%San Luis ObispoCalifornia
51Folsom Sierra Endoscopy Center76.9%FolsomCalifornia
52Aspen Surgery Center76.8%Walnut CreekCalifornia
53Washington Outpatient Surgery Center76.8%FremontCalifornia
54Advanced Diagnostic & Surgical Center76.6%AlhambraCalifornia
55Posada Surgery Center76.5%TempletonCalifornia
56Archibald Surgery Center76.4%Rancho CucamongaCalifornia
57Surgical Care Affiliates - La Veta Surgical Center76.4%OrangeCalifornia
58Surgical Care Affiliates - Golden Triangle Surgicenter76.4%MurrietaCalifornia
59North Orange County Surgery Center76.2%AnaheimCalifornia
60Aspen Surgery Center76.1%Simi ValleyCalifornia
61Eye MD & Laser Surgery Center76.1%OaklandCalifornia
62Inland Valley Surgery Center76.0%PomonaCalifornia
63Airport Endoscopy Center76.0%Los AngelesCalifornia
64Specialty Surgical Center of Irvine76.0%IrvineCalifornia
65Surgical Care Affiliates - Glenwood Surgery Center75.8%RiversideCalifornia
66Waverley Surgery Center75.8%Palo AltoCalifornia
67Sutter Health - Briggsmore Specialty Surgery Care Center75.7%ModestoCalifornia
68Four Seasons Surgery Centers of Ontario75.6%OntarioCalifornia
69Sutter Health - Otay Lakes Surgery Center75.6%Chula VistaCalifornia
70Salinas Endoscopy Center75.4%SalinasCalifornia
71Sutter Health - Roseville Endoscopy Center75.4%RosevilleCalifornia
72Monterey Peninsula Surgery Centers75.4%MontereyCalifornia
73Mirage Endoscopy Center75.4%Rancho MirageCalifornia
74Pacific Ambulatory Surgery Center75.3%AlhambraCalifornia
75Greater Long Beach Endoscopy Center75.2%Long BeachCalifornia
76Sutter Health - Amador Surgery Center75.1%JacksonCalifornia
77San Antonio Ambulatory Surgical Center74.9%UplandCalifornia
78South Bay Gastroenterology - Endoscopy Center74.9%TorranceCalifornia
79Southern California Stone Center74.9%EncinoCalifornia
80Mission Valley Eye Medical Surgical Center74.6%FremontCalifornia


If your facility is listed in the ranking, click here to learn more about the licencing options.


Working with data research firm Statista, we analyzed ambulatory surgical center performance data. As part of the research, we conducted a survey of experts, asking nurses, therapists, physicians and surgeons, and administrators in ASCs for the best surgery centers in their state or a state they're familiar with. We also invited them to assess how well the ASC in question has handled the challenges of the COVID-19 crisis.

The rankings included Ambulatory Surgery Centers operating exclusively for the purpose of providing surgical services to patients not requiring hospitalization and in which the expected duration of services would not exceed 24 hours following an admission. An unanticipated medical circumstance may arise that would require an ASC patient to stay in the ASC longer than 24 hours, but such situations should be rare.

The research project analyzed more than 4,300 Ambulatory Surgery Centers in 25 states. The 400 Best Ambulatory Surgery Centers were identified, with a varying number of ASCs awarded per state: California, with 80, had the most, while Mississippi is represented with 3 ambulatory surgery centers.

The Ranking is based on the Overall Score of each facility, which is based on the Reputation Score and the KPI Data Score. The Reputation Score is based on three sub-scores: for recommendations, for quality and for the handling of the situation regarding Covid-19 (as of August 2020).

Additionally, experts from all over the US were able to participate in the survey of the Best Ambulatory Surgery Centers in the US on All data was collected by Newsweek and Statista during the survey period from July to September 2020. Self-recommendation was not possible (e.g. a recommendation of the ambulatory surgery centers someone worked for was not counted in the evaluation).

Participants were asked to recommend up to five ambulatory surgery centers. Additionally, participants were asked to rank quality, differentiating among these variables:
- Management in times of the COVID-19 crisis (e.g. safety of residents, hygiene measures)
- Management of waiting time (e.g. appointments) Quality of surgery preparations (e.g. consultation with doctor, information)
- Quality of surgical care (e.g. procedure)
- Quality of follow-up care (e.g. physical therapies)

The KPI Data Score is based on number of measures which are important for safe surgeries (e.g. burns, falls, hospital transfers). The U.S. Centers for Medicare & Medicaid Services (CMS) finalized the Ambulatory Surgical Center Quality Reporting (ASCQR) Program which provides KPI data for ambulatory surgery centers.

For the full methodology, download this file.