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. Theodore Hatch, MDFolsom, CA · No drug or device payments recorded (2025) ·
(916) 817-5000 Dr. Thomas Deeble, MDFolsom, CA · No drug or device payments recorded (2025) ·
(916) 817-5000 Dr. Allyson Wang, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(562) 787-8027 Dr. Amante Pulido, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Amy Zhai, M.D.Fontana, CA · $1,748 in drug and device payments (2025) ·
(909) 427-5279 Dr. Bernabe Marinduque, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 356-4459 Dr. Berneva Adams, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Ceeccy Yang, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5539 Dr. Chang-ho Song, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Chang Koh, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Chang Lee, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Christina Holbert, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 350-4620 Dr. Chul Choi, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Corinne Bainer, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Curt Bouma, MDFontana, CA · $162 in drug and device payments (2025) ·
(909) 427-3910 Dr. Diana Tran, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Elaine Pan, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Erica Medina, MDFontana, CA · No drug or device payments recorded (2025) ·
(833) 574-2273 Dr. Esteban Andryjowicz, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Fabiana Kim, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Francisco Pulido, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Hector Anguiano, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Jean Park, MD. MPHFontana, CA · $128 in drug and device payments (2025) ·
(909) 427-5629 Dr. Jerrelyn Inocencio-diaz, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Jerry Yu, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Jessica Iskander, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-4377 Dr. Jessica Jocson, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-7132 Dr. Karen Oshiro, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Karl Urban, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Kenneth Griffis Jr., MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Kim Spencer, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Kyu Kwak, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Leopoldo Alonzo, MDFontana, CA · $220 in drug and device payments (2025) ·
(909) 427-3910 Dr. Linda Knudtson, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Lorraine Atilano, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Mallory Zhang, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-2615 Dr. Mishka Peart, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(888) 750-0036 Dr. My-linh Pham, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-7498 Dr. Rafik Hodeib, DOFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Ravindhra Mamilla, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Reinaldo Ruiz, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Rick Murray, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Rodney Parker, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Sandra Crowder, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Sonty Man, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(888) 750-0036 Dr. Sung Lee, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Suzanne CaoFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-6538 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.
Obstetrics & Gynecology in all 50 states Search all 5,103 in the directory Ask Zach for help choosing
Related
