OB-GYNs in California
Data updated monthly · Last refresh October 2026
5,103 Obstetrics & Gynecology providers practice in California, including 564 (11%) 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.
5,103providers
564telehealth
Los Angelestop city
Obstetrics & Gynecology by city in California
Choose a city to see providers there.
Obstetrics & Gynecology 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. Rachael Morin Rayburn, D.O.Fresno, CA · $336 in drug and device payments (2025) · Telehealth ·
(559) 321-2930 Dr. Rebecca Evangelista, DOFresno, CA · No drug or device payments recorded (2025) ·
(559) 443-2682 Dr. Richard Shebelut, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 439-2229 Dr. Robert Curry, M.D.Fresno, CA · No drug or device payments recorded (2025) ·
(559) 981-2600 Dr. Sharon Kopacz, MDFresno, CA · $1,812 in drug and device payments (2025) ·
(559) 322-2930 Dr. Shelley Mccormack, MD/PHARMDFresno, CA · No drug or device payments recorded (2025) ·
(559) 443-2694 Dr. Stephanie Melchor, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 443-2694 Dr. Stewart Mason, M.D.Fresno, CA · $8,557 in drug and device payments (2025) · Telehealth ·
(559) 981-2600 Dr. Teresa MunozFresno, CA · No drug or device payments recorded (2025) ·
(559) 499-6548 Dr. Tina Dhillon-ashley, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 457-5650 Dr. Vasanth Vishwanath, MD Dr. Veena Mamidi, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 457-5200 Dr. William Griffin, M.D.Fresno, CA · No drug or device payments recorded (2025) ·
(559) 435-6222 Dr. Brian Gray, MDFullerton, CA · $113 in drug and device payments (2025) ·
(714) 992-5350 Dr. Christina Borsari, MDFullerton, CA · $23 in drug and device payments (2025) ·
(714) 992-5350 Dr. Christina BuchananFullerton, CA · $76 in drug and device payments (2025) ·
(714) 992-5350 Dr. Dennis Buchanan, MDFullerton, CA · $55 in drug and device payments (2025) ·
(714) 992-5350 Dr. Donald Henderson, MDFullerton, CA · No drug or device payments recorded (2025) ·
(714) 992-5350 Dr. Earl Fuller, M.D.Fullerton, CA · No drug or device payments recorded (2025) ·
(714) 879-7526 Dr. Jennifer Roelands, MDFullerton, CA · $23 in drug and device payments (2025) · Telehealth ·
(714) 272-3477 Dr. Jerald Thanos, M.D.Fullerton, CA · No drug or device payments recorded (2025) ·
(714) 990-2900 Dr. Johanna Su, M.D.Fullerton, CA · $16 in drug and device payments (2025) ·
(714) 992-5350 Dr. Minette Finney, MDFullerton, CA · $130 in drug and device payments (2025) ·
(714) 992-3969 Dr. Mirna Demirdjian, MDFullerton, CA · $30 in drug and device payments (2025) ·
(714) 409-6881 Dr. Nicholas Thanos, M.D.Fullerton, CA · No drug or device payments recorded (2025) ·
(714) 990-2900 Dr. Pouran Malekzadeh, MDFullerton, CA · No drug or device payments recorded (2025) ·
(714) 992-5350 Dr. Riana Sandhar, MDFullerton, CA · $29 in drug and device payments (2025) ·
(714) 992-5350 Dr. Robyn Vieth, M.D.Fullerton, CA · $29 in drug and device payments (2025) ·
(714) 992-5350 Dr. Theresa Franks, MDFullerton, CA · $182 in drug and device payments (2025) ·
(714) 992-5350 Dr. Vasiliki Tatsis, MDFullerton, CA · No drug or device payments recorded (2025) ·
(714) 990-2900 Dr. Gwen Allen, M.D.Gardena, CA · $422 in drug and device payments (2025) ·
(310) 329-9492 Dr. Katrin Massoudian, M.D.Gardena, CA · No drug or device payments recorded (2025) ·
(310) 516-2459 Dr. Christopher Winkle, MDGarden Grove, CA · No drug or device payments recorded (2025) ·
(714) 638-1120 Dr. Ha Nguyen, M.D.Garden Grove, CA · $1,269 in drug and device payments (2025) · Telehealth ·
(714) 468-6755 Dr. Mary Washburn, M.D.Garden Grove, CA · No drug or device payments recorded (2025) ·
(714) 887-9933 Dr. Mehrdad Forghani-arani, D.O.Garden Grove, CA · No drug or device payments recorded (2025) ·
(714) 537-1387 Dr. Thanh-mai Trinh, MDGarden Grove, CA · $471 in drug and device payments (2025) ·
(714) 638-1864 Dr. Thuc Tran, M.D.Garden Grove, CA · $1,682 in drug and device payments (2025) ·
(714) 786-6652 Dr. Tuong Van Nguyen, M.D.Garden Grove, CA · $42 in drug and device payments (2025) ·
(888) 988-2800 Dr. Ali Hoda, MDGilroy, CA · No drug or device payments recorded (2025) ·
(408) 842-5059 Dr. Eliza Nguyen, MDGilroy, CA · No drug or device payments recorded (2025) ·
(408) 848-4600 Dr. Jumnah Arasu, M.D., F.A.C.O.G.Gilroy, CA · No drug or device payments recorded (2025) ·
(408) 847-4200 Dr. Kari Bertrand, M.D.Gilroy, CA · No drug or device payments recorded (2025) ·
(408) 848-0222 Dr. Michael H Dez, MDGilroy, CA · No drug or device payments recorded (2025) ·
(408) 848-4600 Dr. Pamela Edillon, MDGilroy, CA · No drug or device payments recorded (2025) ·
(408) 848-4600 Conditions Obstetrics & Gynecology providers in California commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Obstetrics & Gynecology providers. Individual practices vary, so confirm with the provider before booking.
- Pregnancy care
- Endometriosis
- Fibroids
- PCOS
- Menopause
- Contraception
Common questions
How many Obstetrics & Gynecology providers are in California?There are 5,103 Obstetrics & Gynecology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Obstetrics & Gynecology providers in California offer telehealth?Yes. 564 of the 5,103 Obstetrics & Gynecology providers in California (about 11%) report offering telehealth services in CMS data.
Which cities in California have the most Obstetrics & Gynecology providers?Los Angeles (380), San Diego (278), San Francisco (249) have the highest concentration of Obstetrics & Gynecology providers in California.
How many Obstetrics & Gynecology providers in California received drug or device company payments?1,864 of 5,103 Obstetrics & Gynecology providers in California (37%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Obstetrics & Gynecology providers in California treat?Obstetrics & Gynecology providers commonly treat pregnancy care, endometriosis, fibroids, PCOS, menopause and related conditions. Individual practices vary, so confirm with the provider before booking.
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 OB-GYNs in California work in independent practices or large health systems?Among 2,619 OB-GYNs in California enrolled in Medicare, 18% bill through a solo or small practice with fewer than 10 clinicians, 16% through a mid-size group of 10 to 99, and 66% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do OB-GYNs in California work at?According to CMS facility affiliation records, the California hospitals where the most OB-GYNs hold privileges are Hoag Memorial Hospital Presbyterian in Newport Beach; Cedars-Sinai Medical Center in Los Angeles; California Pacific Medical Ctr-Davies Campus Hosp in San Francisco.
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