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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. Laura Dipaolo, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 652-8500
Dr. Laureen Paraguya, M.D.
Burlingame, CA · $41 in drug and device payments (2025) · (650) 696-5400
Dr. Lauren Friedly, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 288-0602
Dr. Linda Oberstein, MD
Burlingame, CA · No drug or device payments recorded (2025) · (650) 652-8500
Dr. Lisa Hladik, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · Telehealth · (650) 652-8500
Dr. Matthew Yee
Burlingame, CA · $41 in drug and device payments (2025) · (650) 696-3520
Dr. Michelle Dhanak, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 357-8834
Dr. Nani Kanen
Burlingame, CA · $2,206 in drug and device payments (2025) · Telehealth · (650) 697-0361
Dr. Niloufar Khamnehei, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5400
Dr. Rachit Anand, DO
Burlingame, CA · No drug or device payments recorded (2025) · (650) 288-0602
Dr. Richard Jordan, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · Telehealth · (650) 652-8500
Dr. Richard Lu, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 259-9480
Dr. Sagar Shah, MD, MPH
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-3520
Dr. Sashibindu Amara, MD
Burlingame, CA · No drug or device payments recorded (2025) · Telehealth · (650) 652-8500
Dr. Shamsuddin Alamgir, M.D
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5400
Dr. Sharon Lee, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · Telehealth · (650) 652-8500
Dr. Simon Lee, M.D.
Burlingame, CA · $3,576 in drug and device payments (2025) · Telehealth · (650) 692-1388
Dr. Sophie Cole, MD
Burlingame, CA · No drug or device payments recorded (2025) · (650) 288-1200
Dr. Stewart Blandon, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 240-8130
Dr. Tejal Patel, M.D.
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5400
Dr. Tiffany Chi
Burlingame, CA · No drug or device payments recorded (2025) · Telehealth · (916) 297-9400
Dr. Tonia Lessani, MD
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5400
Dr. Whitney Chew, DO
Burlingame, CA · No drug or device payments recorded (2025) · (650) 696-5400
Dr. Sean Munroe, MD
Burney, CA · No drug or device payments recorded (2025) · (530) 335-6070
Dr. Arye Lavin, MD
Calabasas, CA · No drug or device payments recorded (2025) · Telehealth · (818) 876-1050
Dr. Daniel Rosen, MD
Calabasas, CA · $464 in drug and device payments (2025) · (818) 797-8000
Dr. Gisele Wudka, M.D.
Calabasas, CA · No drug or device payments recorded (2025) · (818) 876-1050
Dr. Keith Garb, M.D.
Calabasas, CA · No drug or device payments recorded (2025) · Telehealth · (818) 876-1050
Dr. Luz Delportillo, M.D.
Calabasas, CA · No drug or device payments recorded (2025) · (818) 876-1050
Dr. Masih Sadeghi, M.D.
Calabasas, CA · No drug or device payments recorded (2025) · (424) 333-6485
Dr. Patrick Yaffee, M.D.
Calabasas, CA · No drug or device payments recorded (2025) · Telehealth · (818) 876-1050
Dr. Pegah Mehdizadeh, DO
Calabasas, CA · No drug or device payments recorded (2025) · (818) 922-5204
Dr. Raymond Urbanski, M.D.
Calabasas, CA · No drug or device payments recorded (2025) · (973) 873-8306
Dr. Richard Lander, M.D.
Calabasas, CA · No drug or device payments recorded (2025) · (818) 876-1050
Dr. Sagi Cohen, M.D.
Calabasas, CA · $226 in drug and device payments (2025) · Telehealth · (818) 881-8252
Dr. Samuel Burstein
Calabasas, CA · $1,810 in drug and device payments (2025) · (818) 222-2443
Dr. Sayeh Eshraghi, MD
Calabasas, CA · $103 in drug and device payments (2025) · (818) 858-1182
Dr. Sean Leoni, M.D.
Calabasas, CA · $636 in drug and device payments (2025) · (888) 254-6600
Dr. Wayne Imber, M.D.
Calabasas, CA · No drug or device payments recorded (2025) · (818) 970-7693
Dr. Man Duong, M.D.
Calexico, CA · $459 in drug and device payments (2025) · Telehealth · (760) 890-5432
Dr. Uberto Muzzarelli, MD
Calexico, CA · No drug or device payments recorded (2025) · (760) 768-6262
Dr. Ashmead Ali, MD
California City, CA · $137 in drug and device payments (2025) · Telehealth · (760) 373-1256
Dr. Thillaiampalam Srijaerajah, MD
California City, CA · $426 in drug and device payments (2025) · (760) 373-4809
Dr. Sun Oh, M.D.
Calipatria, CA · No drug or device payments recorded (2025) · (760) 348-7000
Dr. Afrouz Gerayli, MD
Camarillo, CA · $1,685 in drug and device payments (2025) · Telehealth · (805) 484-1033
Dr. Avan Patel, MD
Camarillo, CA · $59 in drug and device payments (2025) · Telehealth · (805) 384-8071
Dr. Behzad Mosharafian, M.D.
Camarillo, CA · $206 in drug and device payments (2025) · (805) 384-8071
Dr. Bennet Lipper, MD
Camarillo, CA · $17 in drug and device payments (2025) · (805) 437-0900
Dr. Brian Santini, M.D.
Camarillo, CA · No drug or device payments recorded (2025) · Telehealth · (805) 383-4510
Dr. Christopher Hynum, M.D.
Camarillo, CA · No drug or device payments recorded (2025) · (805) 485-7951

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.