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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. Joshua Gitter, M.D.
Emeryville, CA · No drug or device payments recorded (2025) · (510) 596-8988
Dr. Katy Young-lee, MD
Emeryville, CA · No drug or device payments recorded (2025) · Telehealth · (510) 806-2100
Dr. Kelley Scott, MD
Emeryville, CA · $133 in drug and device payments (2025) · Telehealth · (888) 924-1036
Dr. Kou-ying Hsieh, M.D.
Emeryville, CA · No drug or device payments recorded (2025) · (510) 596-8988
Dr. Leslie Tim, MD
Emeryville, CA · No drug or device payments recorded (2025) · Telehealth · (510) 806-2100
Dr. Lorilyn Seid, M.D.
Emeryville, CA · No drug or device payments recorded (2025) · (510) 596-8988
Dr. Mia Goldman
Emeryville, CA · No drug or device payments recorded (2025) · (510) 350-2600
Dr. Michael Smith, MD
Emeryville, CA · No drug or device payments recorded (2025) · (510) 525-2400
Dr. Michelle Malcolmson, MD
Emeryville, CA · No drug or device payments recorded (2025) · Telehealth · (510) 266-5400
Dr. Nadine Sbaih, MD
Emeryville, CA · No drug or device payments recorded (2025) · Telehealth · (510) 266-5400
Dr. Nelson Bunin, MD
Emeryville, CA · No drug or device payments recorded (2025) · (510) 525-2400
Dr. Nnenna Nwogu, M.D.
Emeryville, CA · No drug or device payments recorded (2025) · Telehealth · (510) 806-2100
Dr. Rachel Roberts, MD
Emeryville, CA · $16 in drug and device payments (2025) · (510) 806-2100
Dr. Suneetha Madhu, M.D.
Emeryville, CA · No drug or device payments recorded (2025) · (510) 851-7501
Dr. Wenmei Xue, M.D.
Emeryville, CA · No drug or device payments recorded (2025) · (510) 596-8988
Dr. Adam Ellis, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2251
Dr. Alexie Nguyen, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2251
Dr. Allison Habas, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2251
Dr. Amy Tran, MD
Encinitas, CA · $170 in drug and device payments (2025) · Telehealth · (760) 230-2252
Dr. Andre Sanschagrin, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · Telehealth · (760) 436-0078
Dr. Andy Nguyen, D.O.
Encinitas, CA · $292 in drug and device payments (2025) · Telehealth · (760) 230-2251
Dr. Ardeshir Dabestani, MD
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2251
Dr. Arezou Minooee, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · Telehealth · (760) 230-2251
Dr. Aritra Dey, MD
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2251
Dr. Ashraf Elhofy
Encinitas, CA · No drug or device payments recorded (2025) · (858) 869-1594
Dr. Bruce Sachs, M.D.
Encinitas, CA · $236 in drug and device payments (2025) · Telehealth · (760) 944-6520
Dr. Christopher Parker, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · (678) 777-1505
Dr. Cynthia Kao, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2251
Dr. Dana Suhandynata, MD
Encinitas, CA · No drug or device payments recorded (2025) · (760) 633-6501
Dr. Daniel Lo, M.D.
Encinitas, CA · $38 in drug and device payments (2025) · (760) 230-2251
Dr. Daniel Miller, MD
Encinitas, CA · No drug or device payments recorded (2025) · (760) 633-6501
Dr. David Ko, MD
Encinitas, CA · $444 in drug and device payments (2025) · Telehealth · (760) 479-3900
Dr. David Margolis, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · (760) 633-6501
Dr. Dolly Doctor, MD
Encinitas, CA · No drug or device payments recorded (2025) · (432) 528-2527
Dr. Eric Yuen, M.D.
Encinitas, CA · $126 in drug and device payments (2025) · (760) 230-2251
Dr. Farris Sandhu, MD
Encinitas, CA · $368 in drug and device payments (2025) · (760) 230-1200
Dr. Forest Lai, DO
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2251
Dr. Gautam Shah, M. D.
Encinitas, CA · $14 in drug and device payments (2025) · (760) 230-2251
Dr. Gay Walker, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · Telehealth · (760) 479-3900
Dr. Ilinca Vladescu, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · Telehealth · (760) 230-2252
Dr. James Labelle, M.D.
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2251
Dr. Jeannette Aldous, MD
Encinitas, CA · $416 in drug and device payments (2025) · (760) 230-2251
Dr. Jorge Carrera, MD
Encinitas, CA · $19 in drug and device payments (2025) · (760) 635-1777
Dr. Joshua Hillman
Encinitas, CA · No drug or device payments recorded (2025) · Telehealth · (203) 384-3000
Dr. Joyce Havranek, MD
Encinitas, CA · $63 in drug and device payments (2025) · Telehealth · (760) 633-6720
Dr. Kamalini Sundaram, MD
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2251
Dr. Keven Tagdiri, M.D.
Encinitas, CA · $106 in drug and device payments (2025) · Telehealth · (858) 756-3021
Dr. Lewis Self, MD
Encinitas, CA · No drug or device payments recorded (2025) · (760) 230-2252
Dr. Margaret Smith, MD
Encinitas, CA · No drug or device payments recorded (2025) · Telehealth · (760) 230-2251
Dr. Mark Labeau, D.O.
Encinitas, CA · No drug or device payments recorded (2025) · (760) 632-9042

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.