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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. Marko Markov, M.D.
Escondido, CA · $31 in drug and device payments (2025) · (480) 760-5862
Dr. Matthew Guest, M.D
Escondido, CA · No drug or device payments recorded (2025) · Telehealth · (760) 737-2000
Dr. Michael Hanna, M.D.
Escondido, CA · $22 in drug and device payments (2025) · (442) 281-4047
Dr. Nadiya Ginzburg, M.D.
Escondido, CA · $47 in drug and device payments (2025) · (213) 399-0179
Dr. Osman Khawar, M.D., M.P.H.
Escondido, CA · $2 in drug and device payments (2025) · Telehealth · (760) 294-1660
Dr. Patrick Aziz, MD
Escondido, CA · No drug or device payments recorded (2025) · (760) 291-6700
Dr. Philip Mathis, M.D.
Escondido, CA · $113 in drug and device payments (2025) · (760) 510-7300
Dr. Rachel Bacon, M.D
Escondido, CA · $29 in drug and device payments (2025) · (760) 520-8200
Dr. Rebecca Samuels, D.O.
Escondido, CA · $118 in drug and device payments (2025) · Telehealth · (760) 291-6700
Dr. Richard Mallo, MD
Escondido, CA · $236 in drug and device payments (2025) · (760) 291-6700
Dr. Sam Adllirad, DO
Escondido, CA · No drug or device payments recorded (2025) · (442) 281-5000
Dr. Sandy Akrawe, M.D.
Escondido, CA · No drug or device payments recorded (2025) · (442) 281-4047
Dr. Sarin Atam, MD
Escondido, CA · No drug or device payments recorded (2025) · (442) 281-5000
Dr. Shawn Mo, DO
Escondido, CA · No drug or device payments recorded (2025) · (442) 281-5000
Dr. Stoimen Evtimov, M.D.
Escondido, CA · No drug or device payments recorded (2025) · (917) 294-1505
Dr. Tzu Wang, MD
Escondido, CA · No drug or device payments recorded (2025) · (713) 988-2711
Dr. Veronica Mai, DO
Escondido, CA · No drug or device payments recorded (2025) · (760) 291-6700
Dr. Wah Wong
Escondido, CA · No drug or device payments recorded (2025) · (442) 281-5000
Dr. Bruce Kessler, MD
Eureka, CA · No drug or device payments recorded (2025) · (707) 443-9371
Dr. Eurides Lopes, M.D.
Eureka, CA · No drug or device payments recorded (2025) · Telehealth · (707) 443-4666
Dr. Gloria Abels, MD
Eureka, CA · No drug or device payments recorded (2025) · (707) 443-9371
Dr. Jeffrey Parker, M.D.
Eureka, CA · $927 in drug and device payments (2025) · (707) 443-3354
Dr. John Irvine, MD
Eureka, CA · No drug or device payments recorded (2025) · (707) 443-9371
Dr. John Sotelo, M.D.
Eureka, CA · No drug or device payments recorded (2025) · (707) 445-8121
Dr. Malia Honda, M.D., M.S.
Eureka, CA · No drug or device payments recorded (2025) · (707) 441-1624
Dr. Michael Turner, M.D.
Eureka, CA · No drug or device payments recorded (2025) · (707) 441-1624
Dr. Neil Kushner, MD
Eureka, CA · No drug or device payments recorded (2025) · (707) 442-8200
Dr. Shekhar Pai, M.D.
Eureka, CA · No drug or device payments recorded (2025) · (707) 269-4253
Dr. Steven Paul, M.D.
Eureka, CA · No drug or device payments recorded (2025) · (707) 267-2060
Dr. Stuart Cataldo, MD
Eureka, CA · No drug or device payments recorded (2025) · Telehealth · (707) 267-2070
Dr. Win Kyin, MD
Eureka, CA · No drug or device payments recorded (2025) · (707) 445-8121
Dr. Amanda Adkins, M.D.
Fairfield, CA · No drug or device payments recorded (2025) · Telehealth · (707) 646-5500
Dr. Amitkumar Patel, MD
Fairfield, CA · No drug or device payments recorded (2025) · Telehealth · (707) 427-4000
Dr. Andrew Glickstein, M.D.
Fairfield, CA · No drug or device payments recorded (2025) · (707) 863-4258
Dr. Anit Patel, M.D.
Fairfield, CA · $2,816 in drug and device payments (2025) · Telehealth · (707) 428-2769
Dr. Ankit Dubey, MD
Fairfield, CA · $397 in drug and device payments (2025) · Telehealth · (707) 646-5500
Dr. Ann Chang, MD
Fairfield, CA · No drug or device payments recorded (2025) · (707) 427-4000
Dr. Cassandra Whitmore, MD
Fairfield, CA · No drug or device payments recorded (2025) · Telehealth · (707) 427-4000
Dr. Charbel Nadra, MD
Fairfield, CA · No drug or device payments recorded (2025) · Telehealth · (707) 427-4900
Dr. Clarisse Cadang, M.D.
Fairfield, CA · No drug or device payments recorded (2025) · Telehealth · (707) 646-3500
Dr. Cong Santoso, M.D.
Fairfield, CA · No drug or device payments recorded (2025) · (707) 423-7342
Dr. Daniel Green, MD
Fairfield, CA · No drug or device payments recorded (2025) · (707) 426-3911
Dr. Daniel Slack, MD
Fairfield, CA · $58 in drug and device payments (2025) · (707) 423-3000
Dr. Dinesh Nagar, M.D.
Fairfield, CA · No drug or device payments recorded (2025) · (707) 646-5550
Dr. Elizabeth Fernandes, MD
Fairfield, CA · No drug or device payments recorded (2025) · (707) 423-5053
Dr. Ella Gupta, D.O
Fairfield, CA · No drug or device payments recorded (2025) · Telehealth · (707) 428-2745
Dr. Emnet Wassie
Fairfield, CA · No drug or device payments recorded (2025) · (707) 646-5080
Dr. Eric Crisostomo, MD
Fairfield, CA · No drug or device payments recorded (2025) · Telehealth · (707) 427-4000
Dr. Georgina Jensen, MD
Fairfield, CA · No drug or device payments recorded (2025) · Telehealth · (707) 427-4000
Dr. Gurmeet Sidhu, MD
Fairfield, CA · No drug or device payments recorded (2025) · Telehealth · (707) 427-4000

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.