Anesthesiologists in California
Data updated monthly · Last refresh October 2026
7,627 Anesthesiology providers practice in California, including 106 (1%) offering telehealth. The largest concentration is in Los Angeles. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
7,627providers
106telehealth
Los Angelestop city
Anesthesiology by city in California
Choose a city to see providers there.
Anesthesiology providers in California
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Monica Bianca BreauxTorrance, CA · No drug or device payments recorded (2025) ·
(310) 222-5067 Dr. Nicholas MondekTorrance, CA · No drug or device payments recorded (2025) ·
(310) 540-7676 Dr. Nikita Nayyar, MDTorrance, CA · No drug or device payments recorded (2025) ·
(310) 222-2700 Dr. Nydia EkasumaraTorrance, CA · $264 in drug and device payments (2025) ·
(310) 540-7676 Dr. Olivia Almeida-hunt, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(424) 306-4000 Dr. Olivia KaminskyTorrance, CA · No drug or device payments recorded (2025) ·
(310) 222-2345 Dr. Patrick Donley, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 325-9110 Dr. Patrick Yang, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 325-9110 Dr. Peter Chu, D.O.Torrance, CA · $21 in drug and device payments (2025) ·
(310) 540-7676 Dr. Peter HuynhTorrance, CA · $47 in drug and device payments (2025) ·
(424) 306-8012 Dr. Peter Sawras, MDTorrance, CA · $147 in drug and device payments (2025) ·
(310) 222-2700 Dr. Philip Chuang, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 303-6700 Dr. Rajesh Shankar, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 222-2401 Dr. Revati NafdayTorrance, CA · $47 in drug and device payments (2025) ·
(424) 306-8008 Dr. Robert Hanna, M.D.Torrance, CA · $170 in drug and device payments (2025) ·
(310) 784-2710 Dr. Roger Brown, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 325-9110 Dr. Ruth Ackermann, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 325-4555 Dr. Samantha Love Onnagan, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 222-2345 Dr. Samantha Madrid, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 222-5067 Dr. Sandra Yee, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 325-4555 Dr. Sean Cheng, M.D.Torrance, CA · $48 in drug and device payments (2025) ·
(310) 325-9110 Dr. Sean Tretiak, M.D.Torrance, CA · $79 in drug and device payments (2025) ·
(310) 325-9110 Dr. Stanley Chang, M.D.Torrance, CA · $46 in drug and device payments (2025) ·
(310) 325-9110 Dr. Steve Ciancio, MDTorrance, CA · No drug or device payments recorded (2025) ·
(323) 286-8317 Dr. Steven Underberger, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 325-9110 Dr. Susan Christensen, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 540-7676 Dr. Tai-shion Lee, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 222-3861 Dr. Teri Diamond, MDTorrance, CA · $241 in drug and device payments (2025) · Telehealth ·
(310) 325-9110 Dr. Thomas Leverone, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 325-4555 Dr. Thomas Paulsen, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 371-0813 Dr. Thomas Sedgwick, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 325-9110 Dr. Vadim Tokhner, MDTorrance, CA · $70 in drug and device payments (2025) ·
(424) 306-8012 Dr. Victoria Zheng, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(330) 339-6226 Dr. Victor Wong, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 325-9110 Dr. Vien NguyenTorrance, CA · $26 in drug and device payments (2025) ·
(310) 325-9110 Dr. Walter Brannan, M.D.Torrance, CA · $26 in drug and device payments (2025) ·
(310) 325-9110 Dr. Wing-fai Kwan, M.D.Torrance, CA · No drug or device payments recorded (2025) ·
(310) 222-3472 Dr. Woosung Kim, M.D.Torrance, CA · $83 in drug and device payments (2025) ·
(999) 999-9999 Dr. Xiaoyan Zhang, M.D.Torrance, CA · $146 in drug and device payments (2025) ·
(310) 484-5935 Dr. Zada LiuTorrance, CA · No drug or device payments recorded (2025) ·
(310) 222-2345 Dr. Zahir Allarakhia, MDTorrance, CA · No drug or device payments recorded (2025) ·
(424) 306-8000 Dr. Zakir Rangwala, MDTorrance, CA · $1,300 in drug and device payments (2025) ·
(310) 704-9195 Dr. Anita Xue, M.D.Tracy, CA · No drug or device payments recorded (2025) ·
(209) 832-0535 Dr. Christopher Fossaceca, MDTracy, CA · No drug or device payments recorded (2025) ·
(209) 832-0535 Dr. Ian Brown, M.D.Tracy, CA · No drug or device payments recorded (2025) ·
(209) 836-5680 Dr. James Halderman, M.D.Tracy, CA · No drug or device payments recorded (2025) ·
(209) 832-0535 Dr. Margaret Haggerty, MDTracy, CA · No drug or device payments recorded (2025) ·
(209) 835-1500 Dr. Samuel Oh, MDTracy, CA · No drug or device payments recorded (2025) ·
(209) 832-0535 Dr. Alana WaiwaioleTravis Afb, CA · No drug or device payments recorded (2025) ·
(707) 423-3000 Common questions
How many Anesthesiology providers are in California?There are 7,627 Anesthesiology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Anesthesiology providers in California offer telehealth?Yes. 106 of the 7,627 Anesthesiology providers in California (about 1%) report offering telehealth services in CMS data.
Which cities in California have the most Anesthesiology providers?Los Angeles (774), San Diego (690), San Francisco (508) have the highest concentration of Anesthesiology providers in California.
How many Anesthesiology providers in California received drug or device company payments?2,112 of 7,627 Anesthesiology providers in California (28%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Do most Anesthesiologists in California work in independent practices or large health systems?Among 4,562 Anesthesiologists in California enrolled in Medicare, 7% bill through a solo or small practice with fewer than 10 clinicians, 24% through a mid-size group of 10 to 99, and 68% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Anesthesiologists in California work at?According to CMS facility affiliation records, the California hospitals where the most Anesthesiologists hold privileges are Stanford Health Care in Stanford; Cedars-Sinai Medical Center in Los Angeles; Uci Health-Orange in Orange.
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