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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. Avani Patel, M.D.
Chino, CA · $164 in drug and device payments (2025) · Telehealth · (909) 660-8585
Dr. Gary Lai, M.D.
Chino, CA · $48 in drug and device payments (2025) · Telehealth · (909) 548-3888
Dr. Gerardo General, MD
Chino, CA · No drug or device payments recorded (2025) · (909) 465-6464
Dr. Hoan Nguyen, M.D.
Chino, CA · No drug or device payments recorded (2025) · (909) 597-1821
Dr. Howard Chen, DO
Chino, CA · No drug or device payments recorded (2025) · (909) 597-1821
Dr. Jonathan Cho, M.D.
Chino, CA · No drug or device payments recorded (2025) · (909) 597-1821
Dr. Jonathan Ou, M.D
Chino, CA · $20 in drug and device payments (2025) · Telehealth · (909) 465-6342
Dr. Jose Lira, M.D.
Chino, CA · $28 in drug and device payments (2025) · (909) 591-6446
Dr. Karin Li, MD
Chino, CA · $508 in drug and device payments (2025) · Telehealth · (909) 325-2215
Dr. Mao-jin Fu, M.D.
Chino, CA · No drug or device payments recorded (2025) · (909) 591-3855
Dr. Ricardo Saca, M.D.
Chino, CA · $1,310 in drug and device payments (2025) · Telehealth · (909) 465-2077
Dr. Robert Clinton, M.D.
Chino, CA · No drug or device payments recorded (2025) · (909) 597-1821
Dr. Sean To, M.D.
Chino, CA · $913 in drug and device payments (2025) · Telehealth · (909) 988-1000
Dr. Tuan Hoang, MD
Chino, CA · No drug or device payments recorded (2025) · (909) 597-1821
Dr. Xiao-ling Zhang, M.D
Chino, CA · $209 in drug and device payments (2025) · (909) 591-8200
Dr. Yenchih Lin, MD
Chino, CA · $1,624 in drug and device payments (2025) · (909) 902-5288
Dr. Melvin Kantono, DO
Chino Hills, CA · $276 in drug and device payments (2025) · Telehealth · (909) 929-2511
Dr. Angeles Losada, MD, PHD
Chowchilla, CA · No drug or device payments recorded (2025) · (559) 665-5531
Dr. Pal Virk, M.D.
Chowchilla, CA · No drug or device payments recorded (2025) · (559) 665-6100
Dr. Shalon Nash, D.O.
Chowchilla, CA · No drug or device payments recorded (2025) · (559) 665-6100
Dr. Su Myat Paing
Chowchilla, CA · No drug or device payments recorded (2025) · Telehealth · (559) 664-4000
Dr. Swe Lwin
Chowchilla, CA · No drug or device payments recorded (2025) · (559) 665-5531
Dr. Tin-aung Shwe, MD
Chowchilla, CA · No drug or device payments recorded (2025) · (559) 665-6100
Dr. Ahmed Al-sarray, MD
Chula Vista, CA · $23 in drug and device payments (2025) · (619) 502-5800
Dr. Alda Chavez, MD
Chula Vista, CA · No drug or device payments recorded (2025) · (619) 755-5908
Dr. Alejandro Hinojosa-valencia, MD
Chula Vista, CA · No drug or device payments recorded (2025) · (619) 422-6158
Dr. Alhussain Saeed, MD
Chula Vista, CA · $31 in drug and device payments (2025) · (619) 502-5800
Dr. Ali Fadhil, M.D.
Chula Vista, CA · No drug or device payments recorded (2025) · (619) 426-9731
Dr. Amanda De Four, M.D.
Chula Vista, CA · No drug or device payments recorded (2025) · (619) 691-7000
Dr. Andres Bustamante
Chula Vista, CA · No drug or device payments recorded (2025) · (619) 426-9610
Dr. Arturo Valderrama, M.D.
Chula Vista, CA · $1,218 in drug and device payments (2025) · Telehealth · (619) 397-5400
Dr. Bao Ho, M.D., D.O
Chula Vista, CA · $22 in drug and device payments (2025) · Telehealth · (858) 499-2713
Dr. Bashar Mirza, M.D.
Chula Vista, CA · $28 in drug and device payments (2025) · (858) 499-2600
Dr. Brian Curley, M.D
Chula Vista, CA · $28 in drug and device payments (2025) · (858) 499-2616
Dr. Brian Trinh, DO
Chula Vista, CA · No drug or device payments recorded (2025) · (858) 260-7825
Dr. Carlos Jimenez-grillo, M.D.
Chula Vista, CA · No drug or device payments recorded (2025) · (858) 499-2600
Dr. Cesar Pena, M.D.
Chula Vista, CA · $78 in drug and device payments (2025) · (619) 426-9610
Dr. Christine Davis
Chula Vista, CA · $20 in drug and device payments (2025) · (619) 271-7824
Dr. Cristina Misra, MD
Chula Vista, CA · $27 in drug and device payments (2025) · Telehealth · (858) 499-2713
Dr. Daniel Hiles, MD
Chula Vista, CA · No drug or device payments recorded (2025) · (808) 989-4398
Dr. David Brunsting, MD
Chula Vista, CA · $88 in drug and device payments (2025) · (619) 502-7300
Dr. David Hansen, MD
Chula Vista, CA · $1,019 in drug and device payments (2025) · Telehealth · (619) 421-4000
Dr. David Malinak, MD
Chula Vista, CA · No drug or device payments recorded (2025) · (858) 499-2713
Dr. Diana Rowell, M.D.
Chula Vista, CA · $25 in drug and device payments (2025) · (858) 499-2707
Dr. Douglas Laity, M.D.
Chula Vista, CA · $28 in drug and device payments (2025) · (858) 499-2770
Dr. Duc Le, M.D.
Chula Vista, CA · $273 in drug and device payments (2025) · (619) 502-5800
Dr. Edward Greene
Chula Vista, CA · $150 in drug and device payments (2025) · Telehealth · (858) 499-2600
Dr. Elion Brace, MD
Chula Vista, CA · $21 in drug and device payments (2025) · Telehealth · (619) 836-3229
Dr. Emily Deloria, M.D.
Chula Vista, CA · No drug or device payments recorded (2025) · (619) 271-7100
Dr. Eric Olson, M.D.
Chula Vista, CA · No drug or device payments recorded (2025) · (858) 552-8585

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.