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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. Kwame Agyeman
Loma Linda, CA · No drug or device payments recorded (2025) · (951) 640-9517
Dr. Leah Tudtud-hans, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-2191
Dr. Leonard Werner, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-2870
Dr. Lindsay Collins, DO
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-6131
Dr. Marian Abdelmalek, DO
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4074
Dr. Mark Robinson, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-2870
Dr. Marvin Elias, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · Telehealth · (909) 558-2870
Dr. Mathew Shedd
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4074
Dr. Matthew Edwards, MD
Loma Linda, CA · No drug or device payments recorded (2025) · Telehealth · (909) 558-4000
Dr. Maximo Baquiran, DO
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4000
Dr. Max Morin, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4884
Dr. Mazna Ahmad, MD
Loma Linda, CA · $15 in drug and device payments (2025) · (909) 558-2870
Dr. Megan Nicole Gampong
Loma Linda, CA · $22 in drug and device payments (2025) · (800) 328-1163
Dr. Michaela Gruzensky
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4074
Dr. Michael Woo, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 825-7084
Dr. Michele Quan, MD, MPH
Loma Linda, CA · $300 in drug and device payments (2025) · Telehealth · (909) 558-4489
Dr. Michelle Kim, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4884
Dr. Mie Mie Thinn, MBBS
Loma Linda, CA · No drug or device payments recorded (2025) · Telehealth · (909) 824-0800
Dr. Mi Ye Kim, D.O.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 825-7084
Dr. Mohammad Jaber, MD
Loma Linda, CA · $162 in drug and device payments (2025) · (909) 558-6131
Dr. Mohammad Qureashi, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4074
Dr. Mohammed Abdelrahim, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4074
Dr. Mst Nurjahan Khatun, MD
Loma Linda, CA · $900 in drug and device payments (2025) · (408) 355-8650
Dr. Nagamani Dandamudi, M.D.,
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 825-7084
Dr. Naveen Gupta, M.D.
Loma Linda, CA · $265 in drug and device payments (2025) · (909) 558-4000
Dr. Nicole Shah-ghassemzadeh, D.O.
Loma Linda, CA · $120 in drug and device payments (2025) · (909) 558-4000
Dr. Nikitha Murthy, DO
Loma Linda, CA · $125 in drug and device payments (2025) · (909) 558-4074
Dr. Noor Najim, MD
Loma Linda, CA · No drug or device payments recorded (2025) · Telehealth · (909) 558-2870
Dr. Oleg Nisenberg, MD, PHD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4000
Dr. Olen Haseman, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4074
Dr. Pamela Lobo Moreno, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-2870
Dr. Paramjit Sandhu, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (260) 348-5741
Dr. Parastu Emrani, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4884
Dr. Patricia Dang, D.O.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-8131
Dr. Patrick Wu
Loma Linda, CA · No drug or device payments recorded (2025) · Telehealth · (909) 558-4074
Dr. Paul St John Hammond, MB BS DPHIL
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 801-5167
Dr. Peter Demuth, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4074
Dr. Peter Sorial Soliman, M.D., MPH
Loma Linda, CA · $659 in drug and device payments (2025) · Telehealth · (909) 478-1000
Dr. Petru Papacostea
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 825-7084
Dr. Phat Ngo, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 825-7084
Dr. Purushotham Ramaiah, M.D
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 825-7084
Dr. Qi Yu, D.O.
Loma Linda, CA · No drug or device payments recorded (2025) · Telehealth · (909) 558-6526
Dr. Raoul Correa, MD
Loma Linda, CA · $321 in drug and device payments (2025) · (909) 558-4884
Dr. Raymond Wong, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-2870
Dr. Reed Krause, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4074
Dr. Reihaneh Chokhachi Zadeh Moghadam, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4000
Dr. Renato Florian, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4074
Dr. Reuben Plasencia, MD
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-4000
Dr. Rhodes Rigsby, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · (909) 558-2870
Dr. Rhonda Tetz, M.D.
Loma Linda, CA · No drug or device payments recorded (2025) · Telehealth · (909) 558-2870

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.