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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. Joon Yoon, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 240-8049
Dr. Jorge Monastersky, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 637-2530
Dr. Joselynn Brazier, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 478-3711
Dr. Joseph Craft, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (800) 954-8000
Dr. Joseph De La Merced, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4516
Dr. Joseph Hanovnikian, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 226-7556
Dr. Joseph Javdan, DO
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 265-1998
Dr. Joseph Jordan, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 765-8123
Dr. Joseph Ladapo, MD PHD
Los Angeles, CA · No drug or device payments recorded (2025) · (617) 528-9348
Dr. Jose Saavedra, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Josh Banerjee, M.D., M.P.H.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 226-7593
Dr. Joshua Pevnick, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-5252
Dr. Joshua Sapkin, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 442-5100
Dr. Joshua Smith, M.D.
Los Angeles, CA · $16 in drug and device payments (2025) · (323) 409-5936
Dr. Joya Favreau, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-4683
Dr. Joyce Kim, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-9111
Dr. Joy Kim, MD
Los Angeles, CA · $77 in drug and device payments (2025) · (310) 423-2059
Dr. Juan Barrio, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 987-1362
Dr. Juan Escobar, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 989-0700
Dr. Judy Chen, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0631
Dr. Judy Kim-hwang, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-9111
Dr. Julia Hoffer
Los Angeles, CA · $430 in drug and device payments (2025) · (323) 268-5000
Dr. Julian Hirschbaum, DO
Los Angeles, CA · $269 in drug and device payments (2025) · (323) 226-5610
Dr. Julia Ramos
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-7375
Dr. Julio Loza, D.O.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 262-4176
Dr. Jun Chung, MD
Los Angeles, CA · $2,218 in drug and device payments (2025) · Telehealth · (213) 674-7500
Dr. Jung Bae, M.D.
Los Angeles, CA · $270 in drug and device payments (2025) · (213) 389-3200
Dr. Justin Cohen, DO
Los Angeles, CA · $324 in drug and device payments (2025) · (213) 413-2222
Dr. Justine Korolyov, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 391-7281
Dr. Justin Mak, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 409-1000
Dr. Justin Rheem, M.D.
Los Angeles, CA · $1,920 in drug and device payments (2025) · Telehealth · (213) 381-3630
Dr. Justin Song, MD
Los Angeles, CA · $402 in drug and device payments (2025) · (310) 206-6232
Dr. Justin Yeh, MD
Los Angeles, CA · $1,653 in drug and device payments (2025) · (323) 865-3823
Dr. Justin Zaghi, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (818) 618-6255
Dr. Kairav Sinha, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (408) 564-3176
Dr. Kai-yi Shen, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Kakit Hui, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-9718
Dr. Kalyn Skiles, D.O.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 226-7556
Dr. Kambiz Ashoorzadeh, D.O
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 857-2644
Dr. Kamya Bijawat, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-9111
Dr. Karen Cheng, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0631
Dr. Karen Fond, NP
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-6923
Dr. Karen Kim, M.D.
Los Angeles, CA · $301 in drug and device payments (2025) · Telehealth · (218) 250-9988
Dr. Karl Lorenz
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 478-3711
Dr. Karl Wittnebel, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 423-6325
Dr. Katerina Zakka, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Katharine Borthwick
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-7375
Dr. Katherine Chen, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 206-6232
Dr. Katherine Fassihi, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 857-2000
Dr. Katherine Kahn, MD
Los Angeles, CA · $23 in drug and device payments (2025) · Telehealth · (310) 794-2287

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.