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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. Hong Shune, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 654-0010
Dr. Houman Danesh, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Hsuanwen Huang, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 923-3200
Dr. Hyesun Kim, M.D.
Irvine, CA · $20 in drug and device payments (2025) · (949) 752-7575
Dr. Hye Yi, MD
Irvine, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Jaclyn Leong, DO
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (949) 824-7000
Dr. James Lindberg, M.D.
Irvine, CA · $197 in drug and device payments (2025) · (949) 262-3031
Dr. James O'brien, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 272-3800
Dr. James Strebig, MD
Irvine, CA · $72 in drug and device payments (2025) · (949) 654-5344
Dr. James Wang, M.D.
Irvine, CA · $55 in drug and device payments (2025) · (818) 679-8832
Dr. Jane Joaquin-wu, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 705-6635
Dr. Jason Dugan, MD, MBA
Irvine, CA · No drug or device payments recorded (2025) · (949) 551-1090
Dr. Jeffrey Sudeith, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 261-5774
Dr. Jeffrey Young, DO
Irvine, CA · $364 in drug and device payments (2025) · (949) 990-4637
Dr. Jennifer Dong, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 346-4456
Dr. J Margo Orr, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 305-9950
Dr. Joan Moss, MD
Irvine, CA · No drug or device payments recorded (2025) · (714) 921-2273
Dr. John Kao, MD
Irvine, CA · $167 in drug and device payments (2025) · (949) 791-3001
Dr. John Wikle, M.D.
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (949) 262-9700
Dr. Jonathan Oishi, D.O.
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Joon Kim, M.D.
Irvine, CA · $23 in drug and device payments (2025) · (949) 932-2607
Dr. Juan Cabrera, M.D.
Irvine, CA · $583 in drug and device payments (2025) · Telehealth · (855) 206-6764
Dr. Juliana Mathewson, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 502-5438
Dr. Julie Kim, MD
Irvine, CA · $348 in drug and device payments (2025) · (949) 559-6500
Dr. Julie Kuniyoshi, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 748-8538
Dr. Junko Ohara, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 654-8963
Dr. Jun Liu, MD
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Junli Zha, M.D
Irvine, CA · $307 in drug and device payments (2025) · (949) 262-0838
Dr. Justin Harris, M.D.
Irvine, CA · $120 in drug and device payments (2025) · (949) 923-3200
Dr. Kalena Hwang, M.D.
Irvine, CA · $27 in drug and device payments (2025) · Telehealth · (949) 417-9820
Dr. Kambiz Karimi, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Kareem Aboutalib, D.O.
Irvine, CA · $48 in drug and device payments (2025) · (949) 932-5000
Dr. Karen Sun, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 768-6780
Dr. Karoline Wang, MD
Irvine, CA · $541 in drug and device payments (2025) · Telehealth · (714) 236-9279
Dr. Katarina Veskovic, M.D.
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (949) 824-8600
Dr. Keith Lee, MD
Irvine, CA · $2,147 in drug and device payments (2025) · Telehealth · (949) 551-1090
Dr. Kevin Sun, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 923-3200
Dr. Krishni Somaratne, M.D.
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (714) 644-2210
Dr. Lawrence Ahn
Irvine, CA · $172 in drug and device payments (2025) · Telehealth · (949) 552-4584
Dr. Lida Araghi, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (773) 818-2339
Dr. Lilian Chang, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 552-5108
Dr. Linda Alimadadian, DO
Irvine, CA · $1,879 in drug and device payments (2025) · Telehealth · (949) 552-2700
Dr. Lynda Adrig, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 855-7255
Dr. Lynn Nugent, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (714) 378-1678
Dr. Mae Kinaly, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 398-7444
Dr. Mahdieh Fallahtafti, D.O.
Irvine, CA · $357 in drug and device payments (2025) · Telehealth · (949) 654-0010
Dr. Mamak Eatesam, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (408) 881-4177
Dr. Maria Teresa Agner, MD
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Marta Long, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 237-2949
Dr. Maulik Majmudar, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (888) 604-0014

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.