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. Talal Muhtaseb, M.D.Vista, CA · No drug or device payments recorded (2025) ·
(760) 631-5000 Dr. Thomas Shima, M.D.Vista, CA · No drug or device payments recorded (2025) ·
(760) 941-1440 Dr. Tonya Adkins, MDVista, CA · $3,147 in drug and device payments (2025) ·
(760) 631-5000 Dr. Dilipkumar Patel, MDWalnut, CA · No drug or device payments recorded (2025) ·
(626) 321-1431 Dr. Alan Kaplan, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 932-1333 Dr. Anh Do, MDWalnut Creek, CA · $31 in drug and device payments (2025) ·
(925) 627-3440 Dr. April Tritto, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-7278 Dr. Brian Kellert, D.O.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 891-9033 Dr. Christine Riley, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 932-0390 Dr. Dale Tucker, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. David Niver, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Derek Abbassi, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Donna Di Cenzo, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Elaine Carlitz, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Emily Cronbach, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Emma JudinWalnut Creek, CA · $176 in drug and device payments (2025) ·
(925) 239-0012 Dr. Francis Wright, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Gerald Katz, M.D.Walnut Creek, CA · $626 in drug and device payments (2025) ·
(925) 933-4747 Dr. Heidi Chang, MDWalnut Creek, CA · $1,237 in drug and device payments (2025) · Telehealth ·
(925) 393-0033 Dr. Janette Walker, MDWalnut Creek, CA · $142 in drug and device payments (2025) · Telehealth ·
(925) 945-6600 Dr. Janine Senior, MDWalnut Creek, CA · $783 in drug and device payments (2025) ·
(925) 239-0012 Dr. Jean Kayser, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Jessica Johns, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 254-9840 Dr. Johanne Poulin, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(781) 331-1999 Dr. Joseph Rose, MDWalnut Creek, CA · $852 in drug and device payments (2025) ·
(925) 239-0012 Dr. Larry Dotson, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Lauren Sobel, DO, MPHWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4070 Dr. Lillian Lanka, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 287-1750 Dr. Luman Hughes, M.D.Walnut Creek, CA · $363 in drug and device payments (2025) ·
(925) 933-4747 Dr. Madhavi Vemulapalli, MDWalnut Creek, CA · $720 in drug and device payments (2025) ·
(925) 239-0012 Dr. Mark Patterson, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 954-8960 Dr. Megan Jarvis Lavin, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 469-2239 Dr. Mehrnoosh Almassi, MDWalnut Creek, CA · $187 in drug and device payments (2025) ·
(925) 356-8990 Dr. Michael Jordan, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Mindy Plotkin, MDWalnut Creek, CA · $505 in drug and device payments (2025) ·
(925) 933-4747 Dr. Mona Orady, M.D.Walnut Creek, CA · $12,830 in drug and device payments (2025) ·
(415) 500-8133 Dr. Nadine Hanna, M.D.Walnut Creek, CA · $682 in drug and device payments (2025) ·
(925) 933-4747 Dr. Nicole Yee, M.D.Walnut Creek, CA · $167 in drug and device payments (2025) · Telehealth ·
(925) 945-6600 Dr. Phuong-anh Bui, MDWalnut Creek, CA · $132 in drug and device payments (2025) ·
(925) 295-4000 Dr. Richard Kaplan, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 352-4676 Dr. Robert Cole, MDWalnut Creek, CA · $30 in drug and device payments (2025) ·
(925) 935-6952 Dr. Robert Hubbell, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 933-0664 Dr. Robert Mayo, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 930-7740 Dr. Rosemary DelgadoWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 937-9345 Dr. Rusna Jhita, MDWalnut Creek, CA · $695 in drug and device payments (2025) ·
(925) 239-0012 Dr. Sara Mark, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Sara Won, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4040 Dr. Sari Kasper, D.O.Walnut Creek, CA · $84 in drug and device payments (2025) ·
(925) 945-6600 Dr. Serena LinWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4040 Dr. Shani Lerner, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 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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