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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. Binay Kumar, M.D.
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 536-2500
Dr. Catherine Eskander, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (916) 774-4186
Dr. Chia Chou,, M.D.,
Roseville, CA · No drug or device payments recorded (2025) · (916) 782-1264
Dr. Christopher Chang, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (916) 731-1927
Dr. Christopher Lillis, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 797-4715
Dr. Christopher Palkowski, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Christopher Pease, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 781-1927
Dr. Dalbir Sudan, MD
Roseville, CA · No drug or device payments recorded (2025) · (913) 773-4290
Dr. David Massil, M.D.
Roseville, CA · $365 in drug and device payments (2025) · Telehealth · (916) 781-1927
Dr. David Sox, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 797-4715
Dr. Deborah Katz, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Devamani Gowda, MD
Roseville, CA · $257 in drug and device payments (2025) · (916) 797-4715
Dr. Devinder Kumar, M.D.
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 781-1927
Dr. Douglas Canlas, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (916) 797-4715
Dr. Earnest Manjooran, MD
Roseville, CA · $449 in drug and device payments (2025) · Telehealth · (916) 781-9885
Dr. Fatima Jafri, M.D.
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 783-1044
Dr. Floyd David, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 783-0101
Dr. G. Anthony Cantelmi, MD
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 784-4000
Dr. Genevieve Logie, MD
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 936-5380
Dr. George Gallardo, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (916) 474-6590
Dr. Gerald Jankowski, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (916) 769-4085
Dr. Ghadhanfer Salih, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. Glenn Malolot, MD
Roseville, CA · $116 in drug and device payments (2025) · (916) 781-1000
Dr. Grant Campbell, MD
Roseville, CA · $191 in drug and device payments (2025) · (916) 435-2700
Dr. Gregory Naughton, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (916) 474-6590
Dr. Hao Xu, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Harinder Bisla, MD
Roseville, CA · $281 in drug and device payments (2025) · (916) 789-8620
Dr. Hla Hla Myo
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Hong Son, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (415) 308-4587
Dr. Jacob Hoover, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (916) 781-1927
Dr. Jagdeep Bal, M.D.
Roseville, CA · $456 in drug and device payments (2025) · (530) 701-4037
Dr. Jakkidi Reddy, MD
Roseville, CA · $801 in drug and device payments (2025) · Telehealth · (916) 781-9885
Dr. James Florencio Tamesis, M.D.
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 910-2400
Dr. James Heykes, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Janet Eatherton, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Jaspreet Dhanjal, D.O.
Roseville, CA · $919 in drug and device payments (2025) · Telehealth · (916) 446-4449
Dr. Jay Krzewinski, M.D.
Roseville, CA · $52 in drug and device payments (2025) · (916) 781-1927
Dr. Jeffrey Beil, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Jeffrey Mcgee, M.D.
Roseville, CA · $98 in drug and device payments (2025) · (916) 737-5555
Dr. Jennifer Rowberry, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Jeremy Hinton, DO
Roseville, CA · No drug or device payments recorded (2025) · (916) 786-7498
Dr. Jerry Lai, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Jimmy Kuo, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. John Bakos, M.D., PHD
Roseville, CA · No drug or device payments recorded (2025) · (916) 347-7001
Dr. John Zingheim, M.D.
Roseville, CA · No drug or device payments recorded (2025) · (916) 797-4715
Dr. Jonathan Kanz, DO
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 784-4000
Dr. Joseph Flores, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Julia Harrison, MD
Roseville, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Julie Loewen, M.D.
Roseville, CA · No drug or device payments recorded (2025) · Telehealth · (916) 536-2500
Dr. Katherine Robertson, MD
Roseville, CA · No drug or device payments recorded (2025) · (855) 446-8628

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.