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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. Whitney Sherman, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 475-1111
Dr. Yingwei Qi, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 475-1111
Dr. Dane Copeland, M.D.
Santa Fe Springs, CA · $373 in drug and device payments (2025) · (562) 967-2801
Dr. Ahmad Nooristani, M.D.
Santa Maria, CA · $15 in drug and device payments (2025) · (805) 922-6657
Dr. Albert Hawkins, MD
Santa Maria, CA · $376 in drug and device payments (2025) · (805) 928-0997
Dr. Botrous Tawadros, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 346-7230
Dr. David Trefflich, MD
Santa Maria, CA · $185 in drug and device payments (2025) · (805) 361-8900
Dr. Elena Agafonova, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 739-3000
Dr. Elham Novin Baheran, MD
Santa Maria, CA · $18 in drug and device payments (2025) · (805) 739-3235
Dr. Gabriel Foo, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 739-3890
Dr. Hugh Hatfield, M. D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 928-0217
Dr. Ijeoma Ofiaeli, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 739-3890
Dr. Jimmy Baker, MD
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 934-5400
Dr. Joseph Yorke, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 739-3890
Dr. Jose Yongco, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 346-7230
Dr. Laura Sprague, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 937-6390
Dr. Lerzan Tunali Madenci, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 878-6134
Dr. Mohammad Arain, M.D.
Santa Maria, CA · $155 in drug and device payments (2025) · (805) 928-2645
Dr. Nicandro Castaneda, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 739-3215
Dr. Paul Lussier, D.O.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 739-3890
Dr. Rashiklal Patel, MD
Santa Maria, CA · $589 in drug and device payments (2025) · (805) 332-8155
Dr. Roman Winter, M.D.
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 739-3000
Dr. Sam Densen, MD
Santa Maria, CA · $28 in drug and device payments (2025) · (805) 934-5400
Dr. Siri Atma Khalsa, MD
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 739-3215
Dr. Susan Ziemba, MD
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 349-8514
Dr. Yosef Diab, MD
Santa Maria, CA · No drug or device payments recorded (2025) · (805) 475-3640
Dr. Abdullah Firoze Ahmed, M.D.
Santa Monica, CA · $19 in drug and device payments (2025) · Telehealth · (310) 319-4377
Dr. Adam Solis-cohen, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 319-4698
Dr. Adrienne Burrows, MD
Santa Monica, CA · $79 in drug and device payments (2025) · (424) 888-6298
Dr. Agnieszka Gryguc-saxanoff
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 319-4698
Dr. Alanna Chau
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 319-4698
Dr. Alexander Kaplan, MD
Santa Monica, CA · $197 in drug and device payments (2025) · (310) 319-4377
Dr. Alexandra Drakaki, M.D
Santa Monica, CA · $56,339 in drug and device payments (2025) · Telehealth · (310) 829-5471
Dr. Alexandra Zindman, MD
Santa Monica, CA · No drug or device payments recorded (2025) · Telehealth · (310) 458-2381
Dr. Alex Messina, MD
Santa Monica, CA · $14 in drug and device payments (2025) · (310) 453-1103
Dr. Alison Garb
Santa Monica, CA · $920 in drug and device payments (2025) · (310) 459-4321
Dr. Alix Masters
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-8900
Dr. Amanda De La Cerda, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 319-4377
Dr. Amin Khorsandi, M.D.
Santa Monica, CA · $595 in drug and device payments (2025) · Telehealth · (310) 449-0093
Dr. Amornchit Srikureja, M.D.
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 828-9501
Dr. Amy Weimer, M.D.
Santa Monica, CA · $197 in drug and device payments (2025) · Telehealth · (310) 301-8714
Dr. Andrew Shubov, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 998-9118
Dr. Anthony Tabet, D.O.
Santa Monica, CA · $110 in drug and device payments (2025) · (310) 319-4698
Dr. Ariana Wilkinson
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 319-4425
Dr. Ashish Govan, MD
Santa Monica, CA · $65 in drug and device payments (2025) · (310) 656-1702
Dr. Ashley Lewis Hunter
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-8900
Dr. Ashley Suraweera, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 319-4698
Dr. Audrey Shi
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 319-4698
Dr. Begum Sezer, MD
Santa Monica, CA · No drug or device payments recorded (2025) · (310) 315-8900
Dr. Brad Fiske, MD
Santa Monica, CA · No drug or device payments recorded (2025) · Telehealth · (310) 319-4377

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.