HealthcareDiscovery.AI / Doctors / California / Internal Medicine

Internal Medicine Doctors in California

Data updated monthly · Last refresh October 2026

17,715 Internal Medicine providers practice in California, including 4,245 (24%) 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.

17,715providers
4,245telehealth
Los Angelestop city

Internal Medicine by city in California

Choose a city to see providers there.

Internal Medicine in Los Angeles1,417 providers
Internal Medicine in San Francisco1,322 providers
Internal Medicine in San Diego970 providers
Internal Medicine in Sacramento602 providers
Internal Medicine in Oakland434 providers
Internal Medicine in San Jose433 providers
Internal Medicine in Stanford383 providers
Internal Medicine in Fresno339 providers
Internal Medicine in Torrance230 providers
Internal Medicine in Long Beach225 providers
Internal Medicine in Bakersfield210 providers
Internal Medicine in Loma Linda209 providers
Internal Medicine in Palo Alto189 providers
Internal Medicine in Anaheim188 providers
Internal Medicine in Orange188 providers
Internal Medicine in Riverside188 providers
Internal Medicine in Walnut Creek184 providers
Internal Medicine in Santa Monica170 providers
Internal Medicine in La Jolla161 providers
Internal Medicine in Roseville159 providers
Internal Medicine in Irvine155 providers
Internal Medicine in Beverly Hills152 providers
Internal Medicine in Santa Clara142 providers
Internal Medicine in Pasadena138 providers

Internal Medicine 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. Rebecca Varnell, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Reena Gupta, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-4892
Dr. Rena Fox, MD
San Francisco, CA · $42,055 in drug and device payments (2025) · Telehealth · (415) 353-4624
Dr. Renuka Nayak, M.D., PH.D.
San Francisco, CA · $126 in drug and device payments (2025) · (215) 840-6214
Dr. Reshma Vasanwala, D.O.
San Francisco, CA · $125 in drug and device payments (2025) · (510) 204-1893
Dr. Richard Aranow, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 606-9950
Dr. Richard Caplin, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 921-5300
Dr. Richard Chin, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 358-4069
Dr. Richard Gerber, M.D.
San Francisco, CA · $34 in drug and device payments (2025) · (415) 379-6100
Dr. Richard Jacobs, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2626
Dr. Richard Locksley, M.D.
San Francisco, CA · $34,257 in drug and device payments (2025) · (415) 476-9362
Dr. Richard Medoff, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 291-0480
Dr. Richard Stevens, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-4624
Dr. Richard Sweet, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4617
Dr. Richard Tang, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Richard Ward, MD
San Francisco, CA · $41 in drug and device payments (2025) · (415) 885-4971
Dr. Riley Bove, M.D.
San Francisco, CA · $55,088 in drug and device payments (2025) · Telehealth · (415) 353-1000
Dr. Rina Shah, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Rishi Kumar, DO
San Francisco, CA · No drug or device payments recorded (2025) · (415) 531-9047
Dr. Rita Gurley, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 355-7425
Dr. Rita Redberg, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 476-2873
Dr. Robert Baron, MD, MS
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-4624
Dr. Robert Brody
San Francisco, CA · No drug or device payments recorded (2025) · (415) 753-6566
Dr. Robert Dobrow, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-6510
Dr. Robert Farese, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-4615
Dr. Robert Klett, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 531-9047
Dr. Robert Mcgarrigle
San Francisco, CA · No drug or device payments recorded (2025) · (415) 350-9356
Dr. Robert Mithun, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Robert Molino, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 338-1351
Dr. Robert Napoles, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 731-6300
Dr. Robert Nussbaum, M.D.
San Francisco, CA · $3,155 in drug and device payments (2025) · (415) 476-3200
Dr. Roberto Gonzalez
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Robert Rushakoff, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 885-3868
Dr. Robert Short, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1529
Dr. Robert Sinaiko, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 643-6162
Dr. Robert Taylor, MD
San Francisco, CA · $15 in drug and device payments (2025) · (415) 600-3757
Dr. Robert Williams, M.D
San Francisco, CA · No drug or device payments recorded (2025) · (415) 552-1013
Dr. Robert Wong, M.D.
San Francisco, CA · $1,200 in drug and device payments (2025) · (415) 600-2402
Dr. Robin Tittle, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4990
Dr. Rodney Omachi, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 665-3400
Dr. Ronald Elkin, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 331-8390
Dr. Ronald Strauss, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 830-3090
Dr. Rosemary Ku, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (607) 259-0595
Dr. Rose Olson, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Ross Quinn, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 822-8200
Dr. Royce Lin, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 476-4082
Dr. Russell Cucina, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-0726
Dr. Ruth Ann Kwong, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 391-9686
Dr. Ruth Greenblatt, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2119
Dr. Ruth Marlin, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-5660

Conditions Internal Medicine providers in California commonly treat

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

Common questions

How many Internal Medicine providers are in California?

There are 17,715 Internal Medicine providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.

Do Internal Medicine providers in California offer telehealth?

Yes. 4,245 of the 17,715 Internal Medicine providers in California (about 24%) report offering telehealth services in CMS data.

Which cities in California have the most Internal Medicine providers?

Los Angeles (1,417), San Francisco (1,322), San Diego (970) have the highest concentration of Internal Medicine providers in California.

How many Internal Medicine providers in California received drug or device company payments?

5,614 of 17,715 Internal Medicine providers in California (32%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Internal Medicine providers in California treat?

Internal Medicine providers commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management 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 Internal Medicine Doctors in California work in independent practices or large health systems?

Among 10,847 Internal Medicine Doctors in California enrolled in Medicare, 20% bill through a solo or small practice with fewer than 10 clinicians, 12% through a mid-size group of 10 to 99, and 67% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Internal Medicine Doctors in California work at?

According to CMS facility affiliation records, the California hospitals where the most Internal Medicine Doctors hold privileges are Stanford Health Care in Stanford; UCSF Medical Center in San Francisco; Ronald Reagan UCLA Medical Center in Los Angeles.

Related reading on HealthcareDiscovery.AI

Internal Medicine in all 50 states Search all 17,715 in the directory Ask Zach for help choosing

Related

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
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 Internal Medicine in California? Get featured.