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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. Miguel Lizama, MD
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 837-5752
Dr. Monica Sapo, D.O.
Mission Hills, CA · $263 in drug and device payments (2025) · Telehealth · (818) 837-5785
Dr. Mrinal Asopa, DO
Mission Hills, CA · $400 in drug and device payments (2025) · Telehealth · (818) 365-1194
Dr. Naruchon Engkatanakorn, M.D.
Mission Hills, CA · $43 in drug and device payments (2025) · (818) 837-5785
Dr. Natalie Karapetians, M.D.
Mission Hills, CA · $150 in drug and device payments (2025) · (877) 634-3196
Dr. Nayiri Gharibian, D.O.
Mission Hills, CA · No drug or device payments recorded (2025) · Telehealth · (818) 365-9531
Dr. Neela Ramanujam, M.D.
Mission Hills, CA · $24 in drug and device payments (2025) · Telehealth · (877) 634-3196
Dr. Noel Flores, M.D.
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 869-7254
Dr. Ojas Desai, M.D.
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 869-7200
Dr. Pedro Lopez, M.D.
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 869-7200
Dr. Peyman Mesbah Oskui, MD
Mission Hills, CA · $104 in drug and device payments (2025) · (818) 639-4333
Dr. Pharnuk Suthipinijtham, DO.
Mission Hills, CA · $158 in drug and device payments (2025) · (818) 837-5785
Dr. Rachel White, M.D.
Mission Hills, CA · $178 in drug and device payments (2025) · Telehealth · (818) 837-5785
Dr. Rafael Retino, M.D.
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 838-4590
Dr. Rafik Abdou, M.D
Mission Hills, CA · $65 in drug and device payments (2025) · Telehealth · (818) 869-7254
Dr. Rahul Mohan, M.D.
Mission Hills, CA · $589 in drug and device payments (2025) · (818) 869-9531
Dr. Riga Pemba, MD.
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 837-5740
Dr. Robert Finkelstein, MD
Mission Hills, CA · $70 in drug and device payments (2025) · (818) 837-2753
Dr. Saber Patrus, MD
Mission Hills, CA · $26 in drug and device payments (2025) · (818) 837-5789
Dr. Samuel Nyamu, M.D.
Mission Hills, CA · $27 in drug and device payments (2025) · (818) 869-7248
Dr. Sarah Marquez, M.D.
Mission Hills, CA · $35 in drug and device payments (2025) · Telehealth · (877) 934-3196
Dr. Sara Wong, D.O
Mission Hills, CA · $37 in drug and device payments (2025) · (818) 838-4587
Dr. Sarthi Rakshen Shah, M.D.
Mission Hills, CA · $8,727 in drug and device payments (2025) · (818) 365-9531
Dr. Sheila Tai, MD.
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 837-5740
Dr. Si-eup Yoo, MD
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 837-2753
Dr. Sourabh Suryadevara, M.D.
Mission Hills, CA · $252 in drug and device payments (2025) · (818) 365-9531
Dr. Svetlana Fischer, M.D.
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 837-5559
Dr. Taisya Nargizyan, M.D.
Mission Hills, CA · $107 in drug and device payments (2025) · (877) 634-3196
Dr. Tam Te, MD.
Mission Hills, CA · No drug or device payments recorded (2025) · Telehealth · (818) 365-9531
Dr. Tevan Ovsepyan, DO
Mission Hills, CA · $233 in drug and device payments (2025) · (818) 365-9531
Dr. Thien Phung, M.D
Mission Hills, CA · $70 in drug and device payments (2025) · (818) 837-5785
Dr. Victor Zucker, MD
Mission Hills, CA · No drug or device payments recorded (2025) · (818) 365-9531
Dr. Yoonjee Lee, MD.
Mission Hills, CA · $120 in drug and device payments (2025) · Telehealth · (818) 837-5785
Dr. Adrienne Drake, MD
Mission Viejo, CA · No drug or device payments recorded (2025) · (949) 951-0775
Dr. Afshin Doust, M.D.
Mission Viejo, CA · $156 in drug and device payments (2025) · (949) 282-1671
Dr. Alyssa Le, M.D
Mission Viejo, CA · $600 in drug and device payments (2025) · (949) 364-6000
Dr. Amy Underwood-jolly, M.D.
Mission Viejo, CA · $680 in drug and device payments (2025) · Telehealth · (949) 364-6000
Dr. Andrew Truong, MD
Mission Viejo, CA · $953 in drug and device payments (2025) · Telehealth · (949) 364-6000
Dr. Bahareh Khavarian, M.D.
Mission Viejo, CA · No drug or device payments recorded (2025) · (949) 916-8770
Dr. Bahman Badie, M.D.
Mission Viejo, CA · $532 in drug and device payments (2025) · Telehealth · (949) 364-6000
Dr. Bruce Seligsohn, M.D.
Mission Viejo, CA · $145 in drug and device payments (2025) · (949) 588-8775
Dr. Chad Wadell, M.D.
Mission Viejo, CA · $786 in drug and device payments (2025) · Telehealth · (949) 364-6000
Dr. David Kovacs, MD
Mission Viejo, CA · $4,524 in drug and device payments (2025) · Telehealth · (949) 364-7246
Dr. David Pino, M.D.
Mission Viejo, CA · $161 in drug and device payments (2025) · (949) 282-1065
Dr. Dennis Haghighat, M.D.
Mission Viejo, CA · No drug or device payments recorded (2025) · (949) 364-6000
Dr. Diane Zebari, M.D.
Mission Viejo, CA · $289 in drug and device payments (2025) · (949) 364-5318
Dr. Donald Pratt, M.D.
Mission Viejo, CA · $17 in drug and device payments (2025) · (949) 364-6000
Dr. Duc Pham, MD
Mission Viejo, CA · $1,205 in drug and device payments (2025) · Telehealth · (949) 364-6000
Dr. Dung Trinh, MD
Mission Viejo, CA · $49,855 in drug and device payments (2025) · (949) 583-1600
Dr. Edgar Wayne, M.D.
Mission Viejo, CA · No drug or device payments recorded (2025) · (949) 573-9510

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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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.