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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. Christian Reyna, DO
Sacramento, CA · $1,278 in drug and device payments (2025) · Telehealth · (916) 737-5555
Dr. Christian Sandrock, MD
Sacramento, CA · $292,007 in drug and device payments (2025) · (916) 733-3304
Dr. Christian Tran, DO
Sacramento, CA · $162 in drug and device payments (2025) · (916) 688-2000
Dr. Christine Hsu
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 688-6608
Dr. Christopher Pietras, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-7080
Dr. Chuenfu Lin
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7587
Dr. Chung Yao Yu, MD
Sacramento, CA · $307 in drug and device payments (2025) · (916) 733-3777
Dr. Chung-yuan Mui, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Clara Yang, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7506
Dr. Claudia Deyoung, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Cole Pierce, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Colin Mcnamara, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Conan Liu
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Craig Keenan, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-7500
Dr. Crispino Ylanan, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Daniel Cohen, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Danielle Tran
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Danielle Zezoff
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Daniel Wittkop, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 973-5000
Dr. Daniel Yuen, M.D.
Sacramento, CA · $158 in drug and device payments (2025) · Telehealth · (916) 681-6000
Dr. Dan-vinh Nguyen, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-4597
Dr. Darin Latimore, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 703-5567
Dr. Dat Lu, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. David Anderson
Sacramento, CA · $3,547 in drug and device payments (2025) · (916) 734-4800
Dr. David Norene, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-8725
Dr. David Pritchard
Sacramento, CA · $16 in drug and device payments (2025) · Telehealth · (916) 734-3564
Dr. David Sorour, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 681-6000
Dr. Dayna Isaacs, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Dean Rinard, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 681-6000
Dr. Dean Rizzi, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Debby Lee
Sacramento, CA · $122 in drug and device payments (2025) · Telehealth · (916) 734-2737
Dr. Delfino Gonzales, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Denyse Nishio, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7777
Dr. Derek Bays, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 816-0421
Dr. Diana Nguyen, M.D.
Sacramento, CA · $343 in drug and device payments (2025) · (916) 734-7587
Dr. Diane Haddock, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-7080
Dr. Donna Haysbert, MD
Sacramento, CA · No drug or device payments recorded (2025) · (833) 560-7223
Dr. Donna Lea Pepito, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-4597
Dr. Donovan Huynh
Sacramento, CA · No drug or device payments recorded (2025) · (916) 453-4966
Dr. Douglas Alder, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 973-5000
Dr. Douglas Young, MD
Sacramento, CA · $500 in drug and device payments (2025) · Telehealth · (916) 488-6200
Dr. Drew Ingram, M.D.
Sacramento, CA · $3,996 in drug and device payments (2025) · Telehealth · (916) 734-7080
Dr. Edgardo Alonso
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Eduardo Bermudez, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Eduardo Solbes, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-4597
Dr. Edward Cheng, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Edward Hu, DO
Sacramento, CA · $367 in drug and device payments (2025) · (916) 878-3945
Dr. Edward Lee, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3390
Dr. Eileen Chun, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (323) 935-1250
Dr. Elaine Kwong, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3777

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.