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Endocrinologists in California

Data updated monthly · Last refresh October 2026

1,135 Endocrinology, Diabetes & Metabolism providers practice in California, including 586 (52%) 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.

1,135providers
586telehealth
Los Angelestop city

Endocrinology, Diabetes & Metabolism by city in California

Choose a city to see providers there.

Endocrinology, Diabetes & Metabolism in Los Angeles107 providers
Endocrinology, Diabetes & Metabolism in San Francisco78 providers
Endocrinology, Diabetes & Metabolism in San Diego66 providers
Endocrinology, Diabetes & Metabolism in Sacramento41 providers
Endocrinology, Diabetes & Metabolism in Torrance34 providers
Endocrinology, Diabetes & Metabolism in Stanford31 providers
Endocrinology, Diabetes & Metabolism in Santa Monica22 providers
Endocrinology, Diabetes & Metabolism in Long Beach20 providers
Endocrinology, Diabetes & Metabolism in La Jolla20 providers
Endocrinology, Diabetes & Metabolism in Fresno20 providers
Endocrinology, Diabetes & Metabolism in Beverly Hills17 providers
Endocrinology, Diabetes & Metabolism in Newport Beach16 providers
Endocrinology, Diabetes & Metabolism in San Jose16 providers
Endocrinology, Diabetes & Metabolism in Mountain View15 providers
Endocrinology, Diabetes & Metabolism in Palo Alto15 providers
Endocrinology, Diabetes & Metabolism in Bakersfield13 providers
Endocrinology, Diabetes & Metabolism in Orange13 providers
Endocrinology, Diabetes & Metabolism in Roseville12 providers
Endocrinology, Diabetes & Metabolism in Walnut Creek12 providers
Endocrinology, Diabetes & Metabolism in Fullerton12 providers
Endocrinology, Diabetes & Metabolism in Santa Barbara12 providers
Endocrinology, Diabetes & Metabolism in Mission Viejo11 providers
Endocrinology, Diabetes & Metabolism in Duarte11 providers
Endocrinology, Diabetes & Metabolism in Irvine11 providers

Endocrinology, Diabetes & Metabolism 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. Jennie Luna, M.D
San Diego, CA · $847 in drug and device payments (2025) · Telehealth · (619) 298-9931
Dr. Jeremy Pettus
San Diego, CA · $66,339 in drug and device payments (2025) · Telehealth · (858) 657-1636
Dr. Jerrold Olefsky, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Jimmy Mao
San Diego, CA · $84 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Johanna Gerwer, MD, MPH
San Diego, CA · $224 in drug and device payments (2025) · (619) 515-2300
Dr. Jose Canales, M.D.
San Diego, CA · $316 in drug and device payments (2025) · Telehealth · (858) 580-1803
Dr. Joseph Jon Yu, M.D.
San Diego, CA · $25 in drug and device payments (2025) · (800) 926-8273
Dr. Joseph Witztum, M.D.
San Diego, CA · $7,872 in drug and device payments (2025) · (800) 926-8273
Dr. Joyce Chung, M.D.
San Diego, CA · $88 in drug and device payments (2025) · Telehealth · (858) 621-4090
Dr. Juan Frias, M.D.
San Diego, CA · $10,501 in drug and device payments (2025) · (858) 245-1963
Dr. Julie Islam, M.D.
San Diego, CA · $651 in drug and device payments (2025) · (619) 515-2560
Dr. Kalman Holdy, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 344-1846
Dr. Karen Mccowen, M.D.
San Diego, CA · $122 in drug and device payments (2025) · Telehealth · (858) 657-1636
Dr. Kelli Karches, M.D., MPH
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6303
Dr. Ken Fujioka, M.D.
San Diego, CA · $139,970 in drug and device payments (2025) · Telehealth · (858) 794-1250
Dr. Kristen Kulasa, M.D.
San Diego, CA · $94 in drug and device payments (2025) · (619) 543-6222
Dr. Krystal Angeli Valdez, M.D.
San Diego, CA · $3,715 in drug and device payments (2025) · (844) 200-2426
Dr. Lalita Tantisira, M.D.
San Diego, CA · $236 in drug and device payments (2025) · Telehealth · (858) 793-2727
Dr. Li-jung Tai, MD/PHD
San Diego, CA · No drug or device payments recorded (2025) · (858) 646-2454
Dr. Lisa Arian, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 277-0696
Dr. Lisa Strahm, M.D.
San Diego, CA · $10,240 in drug and device payments (2025) · Telehealth · (619) 432-1033
Dr. Louis Christiansen, M.D.
San Diego, CA · $197 in drug and device payments (2025) · Telehealth · (619) 446-1725
Dr. Megan Rogers
San Diego, CA · $469 in drug and device payments (2025) · Telehealth · (858) 554-1212
Dr. Michael Lee, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 794-1250
Dr. Mizuho Mimoto, M.D.
San Diego, CA · $2,130 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Nadeen Hosein, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-7092
Dr. Natsurang Chongkrairatanakul, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 568-8525
Dr. Patricia Juang, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 657-1636
Dr. Patricia Wu, M.D.
San Diego, CA · $3,241 in drug and device payments (2025) · (858) 581-8225
Dr. Preethika Ekanayake, M.D.
San Diego, CA · $30 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Priya Desai, DO
San Diego, CA · $40 in drug and device payments (2025) · (858) 246-0938
Dr. Puneet Arora, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 410-0266
Dr. Ravi Iyengar, M.D.
San Diego, CA · $130 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Raymond Plodkowski
San Diego, CA · $119,031 in drug and device payments (2025) · Telehealth · (858) 794-1250
Dr. Robert Dudl, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Samantha Harris, M.D.
San Diego, CA · $62,242 in drug and device payments (2025) · Telehealth · (858) 794-1250
Dr. Scarlett Decamps, MD
San Diego, CA · $79 in drug and device payments (2025) · (800) 926-8273
Dr. Schafer Boeder, M.D.
San Diego, CA · $33,435 in drug and device payments (2025) · (619) 543-6303
Dr. Simon Bruce, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 531-5977
Dr. Sophie Patzek, M.D,
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 543-6268
Dr. Suvesh Chandiok, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (800) 926-8273
Dr. Tina Nikoomanesh, DO
San Diego, CA · $1,843 in drug and device payments (2025) · Telehealth · (619) 294-8111
Dr. Vala Hamidi, M.D.
San Diego, CA · $97 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Wolfgang Dillman, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Bashar Saad, MD
San Dimas, CA · $8,361 in drug and device payments (2025) · (626) 335-8094
Dr. Marc Gutin, MD
San Dimas, CA · $3,196 in drug and device payments (2025) · Telehealth · (626) 335-8094
Dr. Nalini Singh, M.D.
San Dimas, CA · $278 in drug and device payments (2025) · Telehealth · (909) 592-2023
Dr. Rambod Amani-yazdi M.d, MD
San Dimas, CA · $2,115 in drug and device payments (2025) · (909) 267-9138
Dr. Aaron Neinstein, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-2350
Dr. Ada Lee, M.D.
San Francisco, CA · $16 in drug and device payments (2025) · (415) 353-8946

Conditions Endocrinology, Diabetes & Metabolism providers in California commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Endocrinology, Diabetes & Metabolism providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Endocrinology, Diabetes & Metabolism providers are in California?

There are 1,135 Endocrinology, Diabetes & Metabolism providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.

Do Endocrinology, Diabetes & Metabolism providers in California offer telehealth?

Yes. 586 of the 1,135 Endocrinology, Diabetes & Metabolism providers in California (about 52%) report offering telehealth services in CMS data.

Which cities in California have the most Endocrinology, Diabetes & Metabolism providers?

Los Angeles (107), San Francisco (78), San Diego (66) have the highest concentration of Endocrinology, Diabetes & Metabolism providers in California.

How many Endocrinology, Diabetes & Metabolism providers in California received drug or device company payments?

615 of 1,135 Endocrinology, Diabetes & Metabolism providers in California (54%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Endocrinology, Diabetes & Metabolism providers in California treat?

Endocrinology, Diabetes & Metabolism providers commonly treat type 2 diabetes, thyroid disorders, osteoporosis, hormone imbalance, type 1 diabetes 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 Endocrinologists in California work in independent practices or large health systems?

Among 765 Endocrinologists in California enrolled in Medicare, 18% bill through a solo or small practice with fewer than 10 clinicians, 8% through a mid-size group of 10 to 99, and 74% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Endocrinologists in California work at?

According to CMS facility affiliation records, the California hospitals where the most Endocrinologists hold privileges are Ronald Reagan UCLA Medical Center in Los Angeles; Stanford Health Care in Stanford; Santa Monica - UCLA Med Ctr & Orthopaedic Hospital in Santa Monica.

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Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Endocrinology, Diabetes & Metabolism in California? Get featured.