General Surgeons in California
Data updated monthly · Last refresh October 2026
3,111 Surgery providers practice in California, including 468 (15%) 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.
3,111providers
468telehealth
Los Angelestop city
Surgery by city in California
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Surgery 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. Salvador Guevara, M.D.Walnut Creek, CA · $28,888 in drug and device payments (2025) · Telehealth ·
(925) 391-2220 Dr. Samuel Oommen, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-7340 Dr. Sean Martin, M.D.Walnut Creek, CA · $3,474 in drug and device payments (2025) ·
(925) 932-6330 Dr. Steven Freshman, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Steven Young, M.D.Walnut Creek, CA · $20,828 in drug and device payments (2025) · Telehealth ·
(925) 933-0984 Dr. Teresa Kim, M.D.Walnut Creek, CA · $31 in drug and device payments (2025) ·
(925) 295-7374 Dr. Thomas Macpherson, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Thomas Rolle, MDWalnut Creek, CA · $118 in drug and device payments (2025) ·
(925) 295-4000 Dr. William Greif, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Alexander Friedman, MDWatsonville, CA · No drug or device payments recorded (2025) ·
(831) 768-6600 Dr. Joel Weinstein, M.D.Watsonville, CA · $29 in drug and device payments (2025) ·
(831) 722-4300 Dr. Philip Gilman, M.D.Watsonville, CA · No drug or device payments recorded (2025) ·
(831) 722-3953 Dr. Robert Allen, M.D.Watsonville, CA · No drug or device payments recorded (2025) ·
(831) 768-6266 Dr. Ryan Nolan, M.D.Watsonville, CA · $634 in drug and device payments (2025) ·
(831) 768-6266 Dr. Daniel Harwood, M.D.Weaverville, CA · No drug or device payments recorded (2025) ·
(530) 623-3600 Dr. Alexander Maglunog, M.D.West Covina, CA · $473 in drug and device payments (2025) ·
(626) 962-3254 Dr. Erich Pollak, M.D.West Covina, CA · No drug or device payments recorded (2025) ·
(626) 814-2766 Dr. Gilbert Faustina, MDWest Covina, CA · No drug or device payments recorded (2025) · Telehealth ·
(626) 337-6246 Dr. James Yeo, M.D.West Covina, CA · No drug or device payments recorded (2025) ·
(626) 962-6694 Dr. David Schreier, M.D.West Hills, CA · $37 in drug and device payments (2025) ·
(818) 226-9030 Dr. Edwin Garcia, MDWest Hills, CA · $307 in drug and device payments (2025) ·
(818) 676-4511 Dr. Frank Candela, M.D., F.A.C.S.West Hills, CA · No drug or device payments recorded (2025) ·
(818) 226-9030 Dr. Mahbod Paya, M.D.West Hills, CA · No drug or device payments recorded (2025) ·
(818) 888-7090 Dr. Rachael Williams, M.D.West Hills, CA · $737 in drug and device payments (2025) ·
(818) 981-2050 Dr. Caroline Lauer, MDWest Hollywood, CA · No drug or device payments recorded (2025) ·
(425) 409-7885 Dr. Daniel Shouhed, M.DMWest Hollywood, CA · $587 in drug and device payments (2025) ·
(310) 423-5874 Dr. Desmond Huynh, MDWest Hollywood, CA · $3,880 in drug and device payments (2025) · Telehealth ·
(310) 423-8350 Dr. Galinos Barmparas, M.D.West Hollywood, CA · $3,436 in drug and device payments (2025) ·
(310) 423-5874 Dr. Georgios Voidonikolas, M.D.West Hollywood, CA · No drug or device payments recorded (2025) ·
(310) 423-2641 Dr. Halley Vora, MDWest Hollywood, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 423-5874 Dr. Harry Sax, MDWest Hollywood, CA · $219 in drug and device payments (2025) ·
(310) 967-4333 Dr. Irene Kim, M.D.West Hollywood, CA · $14,737 in drug and device payments (2025) ·
(310) 423-2641 Dr. Jason Pasley, D.O.West Hollywood, CA · $678 in drug and device payments (2025) ·
(310) 423-8650 Dr. Katherine Fleshner, MDWest Hollywood, CA · No drug or device payments recorded (2025) ·
(310) 423-9970 Dr. Kulmeet Sandhu, MDWest Hollywood, CA · $571 in drug and device payments (2025) · Telehealth ·
(310) 423-8350 Dr. Leo Gordon, M.D.West Hollywood, CA · $18 in drug and device payments (2025) ·
(310) 423-1892 Dr. Lisa O'kane, D.O.West Hollywood, CA · $48 in drug and device payments (2025) ·
(310) 423-2641 Dr. Maggie Diller, M.D.West Hollywood, CA · No drug or device payments recorded (2025) ·
(310) 423-5000 Dr. Marissa Boyle, M.D.West Hollywood, CA · No drug or device payments recorded (2025) ·
(310) 423-5874 Dr. Matthew Singer, M.D.West Hollywood, CA · No drug or device payments recorded (2025) ·
(310) 423-5000 Dr. Mir Shanaz Hossain, MDWest Hollywood, CA · $98 in drug and device payments (2025) ·
(310) 423-9331 Dr. Monica Jain, M.D.West Hollywood, CA · $24 in drug and device payments (2025) ·
(310) 423-5874 Dr. Sang NgoWest Hollywood, CA · No drug or device payments recorded (2025) ·
(310) 423-6637 Dr. Sarah Yuen, MDWest Hollywood, CA · $182 in drug and device payments (2025) ·
(310) 423-9970 Dr. Selam Ogbalidet, MDWest Hollywood, CA · No drug or device payments recorded (2025) ·
(877) 829-9823 Dr. Todd Brennan, M.D.West Hollywood, CA · $150 in drug and device payments (2025) ·
(310) 423-7408 Dr. Tsuyoshi Todo, M.D.West Hollywood, CA · $3,090 in drug and device payments (2025) ·
(310) 423-2641 Dr. Yassar Hashim, MBBSWest Hollywood, CA · $1,446 in drug and device payments (2025) ·
(310) 423-8350 Dr. John Berardis, MDWestlake Village, CA · No drug or device payments recorded (2025) ·
(805) 402-0718 Dr. Kychuong Van, MDWestminster, CA · No drug or device payments recorded (2025) ·
(714) 531-2091 Common questions
How many Surgery providers are in California?There are 3,111 Surgery providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Surgery providers in California offer telehealth?Yes. 468 of the 3,111 Surgery providers in California (about 15%) report offering telehealth services in CMS data.
Which cities in California have the most Surgery providers?Los Angeles (260), San Francisco (205), San Diego (158) have the highest concentration of Surgery providers in California.
How many Surgery providers in California received drug or device company payments?1,519 of 3,111 Surgery providers in California (49%) 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 General Surgeons in California work in independent practices or large health systems?Among 1,794 General Surgeons in California enrolled in Medicare, 24% bill through a solo or small practice with fewer than 10 clinicians, 14% through a mid-size group of 10 to 99, and 62% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do General Surgeons in California work at?According to CMS facility affiliation records, the California hospitals where the most General Surgeons hold privileges are Stanford Health Care in Stanford; UCSF Medical Center in San Francisco; Ronald Reagan UCLA Medical Center in Los Angeles.
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