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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. Christopher Allahverdian, MD
Long Beach, CA · $125 in drug and device payments (2025) · (562) 491-9140
Dr. Christopher Ng, DO
Long Beach, CA · No drug or device payments recorded (2025) · (562) 426-3333
Dr. Clayton Dejong, MD
Long Beach, CA · $20 in drug and device payments (2025) · Telehealth · (562) 433-7496
Dr. Concepcion Enriquez, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (310) 753-9442
Dr. Cornelia Barton, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 597-8534
Dr. Courtney Kraske
Long Beach, CA · No drug or device payments recorded (2025) · (562) 933-2000
Dr. Dale Linton, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 428-4613
Dr. Danielle Asef, D.O.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 491-9000
Dr. Danny Phu, M.D.
Long Beach, CA · $185 in drug and device payments (2025) · Telehealth · (562) 988-2777
Dr. Darlene Sampson, M.D.
Long Beach, CA · $11,254 in drug and device payments (2025) · (562) 988-7110
Dr. David Cao, DO
Long Beach, CA · $22 in drug and device payments (2025) · (562) 426-3333
Dr. David Law, MD
Long Beach, CA · $101 in drug and device payments (2025) · (562) 426-3333
Dr. David Nguyen, M.D.
Long Beach, CA · $53 in drug and device payments (2025) · (562) 424-8814
Dr. David Singer, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 435-5353
Dr. Debby Chung, MD
Long Beach, CA · $306 in drug and device payments (2025) · (562) 491-9000
Dr. Dennis Clark, MD
Long Beach, CA · $945 in drug and device payments (2025) · (562) 420-8679
Dr. Diamond Murrin, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 714-9923
Dr. Diana Bryant, MD
Long Beach, CA · $540 in drug and device payments (2025) · Telehealth · (562) 961-9991
Dr. Diane Chau, MD
Long Beach, CA · No drug or device payments recorded (2025) · (888) 562-5442
Dr. Diane Johnson, M.D.
Long Beach, CA · $38 in drug and device payments (2025) · (714) 402-4685
Dr. Diep Bui, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-5406
Dr. Donny Huang, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (714) 308-3068
Dr. Edgar Muradyan, DO
Long Beach, CA · No drug or device payments recorded (2025) · (562) 491-9140
Dr. Eulia Tlisov, DO
Long Beach, CA · $67 in drug and device payments (2025) · (562) 491-9000
Dr. Evelina Appleby, MD
Long Beach, CA · No drug or device payments recorded (2025) · Telehealth · (562) 346-2222
Dr. Fathima Zahra Kamil Faiz, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 424-8814
Dr. Fazeel Shah
Long Beach, CA · No drug or device payments recorded (2025) · (562) 491-9000
Dr. Fernando Villa, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 599-8635
Dr. Fe Tjoa, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Franklin Millin, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 437-0373
Dr. Gabriel Waterman, MD, MBA
Long Beach, CA · No drug or device payments recorded (2025) · (888) 828-7226
Dr. Gagik Gabrielyan, DO
Long Beach, CA · $153 in drug and device payments (2025) · (562) 491-9140
Dr. George Tarryk, M.D.
Long Beach, CA · $16 in drug and device payments (2025) · (562) 989-5844
Dr. Gevork Geshgian, DO
Long Beach, CA · No drug or device payments recorded (2025) · (818) 669-8432
Dr. Ghassan Khamiseh, M.D.
Long Beach, CA · $589 in drug and device payments (2025) · (562) 337-8401
Dr. Ghazal Kooshk Jalali, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 933-2000
Dr. Gilbert Eng, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · Telehealth · (562) 988-7340
Dr. Grace Lee, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Gregory Yung, DO
Long Beach, CA · $15 in drug and device payments (2025) · (562) 491-9140
Dr. Hamid Far, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 424-8814
Dr. Hasan Mirza
Long Beach, CA · $19 in drug and device payments (2025) · (562) 491-9140
Dr. Hayk Mirzoyan, DO
Long Beach, CA · No drug or device payments recorded (2025) · (562) 491-9140
Dr. Henry Johnson
Long Beach, CA · No drug or device payments recorded (2025) · (562) 436-9080
Dr. Howard Worcester, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 595-8549
Dr. Hripsime Gharibjanyan, M.D.
Long Beach, CA · $15 in drug and device payments (2025) · (562) 491-9000
Dr. Hung Nguyen, MD
Long Beach, CA · No drug or device payments recorded (2025) · (714) 642-7870
Dr. Iris Partovi, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 491-9000
Dr. Jack Wu, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · Telehealth · (562) 595-9206
Dr. James Tam, M.D.
Long Beach, CA · $24 in drug and device payments (2025) · (562) 426-3333
Dr. James Vu, DO
Long Beach, CA · No drug or device payments recorded (2025) · (562) 491-9140

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

Related

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.