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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. Iling Chen, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 759-4012
Dr. Inessa Svidler, M.D.
San Francisco, CA · $5,187 in drug and device payments (2025) · Telehealth · (415) 346-4199
Dr. Ingeborg Zoppoth, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 600-2402
Dr. Irina Kryzhanovskaya, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7900
Dr. Iris Huang, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7999
Dr. Irving Ling
San Francisco, CA · $110 in drug and device payments (2025) · (415) 206-5164
Dr. Isabelle Nguyen, MD
San Francisco, CA · $118 in drug and device payments (2025) · (415) 353-6368
Dr. Isabel Ostrer
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8494
Dr. Ivan Hamilton, M.D.
San Francisco, CA · $297 in drug and device payments (2025) · (415) 600-3458
Dr. Jack Huynh, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 391-9686
Dr. Jacklyn Katz
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 292-8803
Dr. Jacklyn Lee, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Jackson Bowers, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Jacob Aaron, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. Jacob Lalezari, M.D.
San Francisco, CA · $89 in drug and device payments (2025) · (415) 353-0800
Dr. Jacob Winter, MD, PHD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Jacqueline Tulsky, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4082
Dr. Jacqueline Whang, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 338-1351
Dr. Jae Yang, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1239
Dr. Jaime Eisen, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (440) 823-6599
Dr. James Chang, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-6817
Dr. James Feeney, MPH, MD
San Francisco, CA · No drug or device payments recorded (2025) · (510) 610-7470
Dr. James Greenberg, MD
San Francisco, CA · $4,767 in drug and device payments (2025) · Telehealth · (415) 474-7955
Dr. James Hansen, MD
San Francisco, CA · $1,247 in drug and device payments (2025) · (415) 387-8031
Dr. James Kahn, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4082
Dr. James Lin, MD
San Francisco, CA · $21 in drug and device payments (2025) · Telehealth · (415) 353-8646
Dr. James Wantuck, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (855) 516-7755
Dr. James Xu, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-9182
Dr. James Yoss, M.D.
San Francisco, CA · $753 in drug and device payments (2025) · (415) 752-0100
Dr. Jamie Yao
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8000
Dr. Jan Casimir Hofmann, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 923-3646
Dr. Jane Hamersley
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Jane Hightower, M.D.
San Francisco, CA · $29 in drug and device payments (2025) · (415) 923-3025
Dr. Jane Jih, MD, MPH
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7900
Dr. Jane Park, M.D.
San Francisco, CA · $15 in drug and device payments (2025) · (415) 600-6000
Dr. Janet Chu, M.D., M.P.H.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7900
Dr. Janet Diaz, MD
San Francisco, CA · $167 in drug and device payments (2025) · (415) 206-8314
Dr. Jason Ni
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. Jaspreet Bahia, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 885-7788
Dr. Jayasree Sundaram
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. Jay Levy, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4071
Dr. Jeanette Krolikowski, D.O.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 641-2128
Dr. Jeanna Goo, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 519-5370
Dr. Jean Shiao
San Francisco, CA · $1,247 in drug and device payments (2025) · (628) 206-8000
Dr. Jeffrey Critchfield, MD
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8000
Dr. Jeffrey Gotts, M.D./PH.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2131
Dr. Jeffrey Martin, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4082
Dr. Jeffrey Stanley, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (844) 847-8216
Dr. Jeffrey Tabas, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-5753
Dr. Jeffrey Tice, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7300

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

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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.