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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. Melanie Spencer-wolf, DO
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Michael Loi, DO
Irvine, CA · No drug or device payments recorded (2025) · (949) 923-3200
Dr. Michael Moon, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 786-0560
Dr. Michael Waldman, M.D.
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (949) 600-8260
Dr. Michelle Tsukamoto, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 932-5000
Dr. Miki Csintalan, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 824-5301
Dr. Mohana Kulkarni, M.D.
Irvine, CA · $94 in drug and device payments (2025) · (949) 910-2347
Dr. Molood Hadi, DO
Irvine, CA · $22 in drug and device payments (2025) · (949) 923-3200
Dr. Mona Sedghian, MD
Irvine, CA · $250 in drug and device payments (2025) · Telehealth · (949) 791-3101
Dr. Nazmul Hasan
Irvine, CA · $198 in drug and device payments (2025) · (714) 456-5691
Dr. Nidal Al Hannat, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Nikki Zahabi, DO
Irvine, CA · $125 in drug and device payments (2025) · Telehealth · (949) 333-7580
Dr. Niroshan Kirupananthan, MD
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Nitasha Rimar, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 923-3391
Dr. Norris Vivatrat, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 923-3200
Dr. Omid Vesal, M.D.
Irvine, CA · $33 in drug and device payments (2025) · (949) 222-2722
Dr. Pamela Lawrence, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 509-2214
Dr. Parag Sharma, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Parvez Jessani, MD
Irvine, CA · $15 in drug and device payments (2025) · (520) 977-2372
Dr. Parvin Shafa, M.D.
Irvine, CA · $652 in drug and device payments (2025) · (949) 551-1113
Dr. Peng-yun Angela Huang, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 393-5789
Dr. Pourya Mirsaeid Ghazi, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Randa Serag, M.D.
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (949) 791-3101
Dr. Ravi Shah, MD
Irvine, CA · $25 in drug and device payments (2025) · (949) 923-3200
Dr. Richard Appel
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Robert Kaaren
Irvine, CA · No drug or device payments recorded (2025) · (949) 510-6106
Dr. Roya Hormozdiaran, MD,
Irvine, CA · $38 in drug and device payments (2025) · (949) 735-2155
Dr. Samy Younis, M.D.
Irvine, CA · $33 in drug and device payments (2025) · (949) 451-9292
Dr. Sara Kim, M.D.
Irvine, CA · $20 in drug and device payments (2025) · (855) 206-6764
Dr. Sara Sabeti
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (858) 554-1212
Dr. Satoshi Kamada, M.D
Irvine, CA · $951 in drug and device payments (2025) · Telehealth · (949) 453-1201
Dr. Savitha Bharadwaj, M.D.
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (949) 791-3101
Dr. Sean Shahamiri, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Shahnoos Mahdavi, M.D.
Irvine, CA · $157 in drug and device payments (2025) · (855) 206-6764
Dr. Shanta Chawla, MD
Irvine, CA · No drug or device payments recorded (2025) · (714) 389-1555
Dr. Shaparak Kamarei, MD
Irvine, CA · $47 in drug and device payments (2025) · Telehealth · (949) 453-4308
Dr. Shawn Hamilton, MD
Irvine, CA · No drug or device payments recorded (2025) · (702) 997-6651
Dr. Shilrey Contreras, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 824-7010
Dr. Shin-shen Wu, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 705-6635
Dr. Shuhab Zaher, DO
Irvine, CA · No drug or device payments recorded (2025) · (949) 923-3200
Dr. Shyh Min Su, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 932-0430
Dr. Simon So, M.D.
Irvine, CA · $688 in drug and device payments (2025) · Telehealth · (949) 273-2888
Dr. Soroosh Mashayekh, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (714) 745-3047
Dr. Strettapon Suriyaniel, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Stuart Gilman, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 294-3129
Dr. Subrato Ghosh, MD
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Susan Davoodifar, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 509-6503
Dr. Susan Hodes, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 262-5751
Dr. Terese Bergheim, M.D.
Irvine, CA · No drug or device payments recorded (2025) · (949) 824-4405
Dr. Tung Ngo, DO
Irvine, CA · $838 in drug and device payments (2025) · Telehealth · (855) 206-6764

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

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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 Internal Medicine in California? Get featured.