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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. Brian Farris, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 278-3000
Dr. Bruce Frambach, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Cameron Oba, M.D.
San Jose, CA · $24 in drug and device payments (2025) · Telehealth · (408) 371-9010
Dr. Cazmo Lukrich, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 299-8737
Dr. Chau Huynh, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 272-8814
Dr. Chen-tsen Shu, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Cheryl Thieu, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-6305
Dr. Chia-yi Hung, D.O.
San Jose, CA · $24 in drug and device payments (2025) · Telehealth · (408) 371-9010
Dr. Chi-ling Que, D.O.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Chistopher Do, M.D.
San Jose, CA · $1,274 in drug and device payments (2025) · Telehealth · (408) 531-8808
Dr. Christaline Fernando, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5110
Dr. Christopher Gunasekera, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-4545
Dr. Christopher Snow, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Christopher Soliz, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Chung Vu, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 274-0226
Dr. Clair Swann, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 292-3222
Dr. Clifford Wang, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-7744
Dr. Cong Nguyen, MD
San Jose, CA · $1,800 in drug and device payments (2025) · (408) 772-6951
Dr. Constance Lo, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Cornelia Chin, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Craig Berlinberg, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 558-2100
Dr. Dae-wook Kang, MD
San Jose, CA · $1,513 in drug and device payments (2025) · Telehealth · (408) 280-5500
Dr. Dana Cruz, D.O.
San Jose, CA · No drug or device payments recorded (2025) · (888) 334-1000
Dr. Dana Hoch, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 817-1306
Dr. Daniela Pi Noa, DO
San Jose, CA · No drug or device payments recorded (2025) · (408) 784-4909
Dr. Daniel Chyu, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Daniella Perlroth, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 371-4714
Dr. Danielle Acosta
San Jose, CA · $23 in drug and device payments (2025) · (408) 885-6305
Dr. Daniel Tse, MD
San Jose, CA · $19 in drug and device payments (2025) · (408) 937-7581
Dr. Dan Le, MD
San Jose, CA · $41 in drug and device payments (2025) · (408) 817-1300
Dr. Dat Huynh, M.D.
San Jose, CA · $1,583 in drug and device payments (2025) · Telehealth · (408) 270-4582
Dr. David Do, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 279-3599
Dr. David Eby, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 292-3991
Dr. David Wong, M.D.
San Jose, CA · $97 in drug and device payments (2025) · Telehealth · (408) 871-3400
Dr. Dayani Nualles-percy, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Denise Massey, MD
San Jose, CA · $22 in drug and device payments (2025) · (408) 879-9941
Dr. Denley Jang, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 363-3000
Dr. Dennis Low, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-7744
Dr. Dhananja Meedeniya
San Jose, CA · No drug or device payments recorded (2025) · (408) 259-5000
Dr. Diana Yang
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 885-5000
Dr. Dietrich Schlueter, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Dinh Dam, M.D.
San Jose, CA · $671 in drug and device payments (2025) · (408) 923-8080
Dr. Doan-trang Shirley, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Dolly Goel, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5105
Dr. Dominic Chiong, M.D.
San Jose, CA · $124 in drug and device payments (2025) · (408) 223-8118
Dr. Donna Lee, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 270-3877
Dr. Don Tran, M.D.
San Jose, CA · $675 in drug and device payments (2025) · Telehealth · (408) 281-3889
Dr. Douglas Tong, M.D.
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 366-0595
Dr. Dwight Lim, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 254-6331
Dr. Eamonn Dunphy, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-4150

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.