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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. Ifunanyachukwu Okwuosa, MD
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-4000
Dr. Iman Richie, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 378-2234
Dr. James Ding, MD
Torrance, CA · $16 in drug and device payments (2025) · Telehealth · (310) 784-5880
Dr. James Powell, MD
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (844) 443-6246
Dr. James Yeh
Torrance, CA · $1,098 in drug and device payments (2025) · (310) 222-2217
Dr. Jamie Polito, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 257-0028
Dr. Janet Lee, D.O.
Torrance, CA · $140 in drug and device payments (2025) · Telehealth · (310) 540-1712
Dr. Janice Loren Chua, MD
Torrance, CA · $350 in drug and device payments (2025) · (424) 306-5570
Dr. Jeffrey Pan, MD
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 214-0811
Dr. Jeffrey Steinberg, M.D.
Torrance, CA · $23 in drug and device payments (2025) · (310) 784-8770
Dr. Jennifer Chew, MD
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 257-0028
Dr. Jesse Szatkowski, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-8292
Dr. Jessica Lo
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-4000
Dr. Jessica Matthiesen, MD
Torrance, CA · $980 in drug and device payments (2025) · (424) 306-5570
Dr. Jessica Osorio
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2345
Dr. Jiachiahn Hsu, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 374-8191
Dr. Joel Thomas, M.D.
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 257-0028
Dr. Joe Torres, MD
Torrance, CA · $45 in drug and device payments (2025) · (424) 306-5570
Dr. Jofel Yan, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 214-0811
Dr. John Chan, MD
Torrance, CA · $77 in drug and device payments (2025) · (310) 214-0811
Dr. John Lim, MD
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (714) 443-4512
Dr. John Mense
Torrance, CA · $300 in drug and device payments (2025) · (310) 325-9110
Dr. John Tsao, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 784-8770
Dr. John Wong, MD
Torrance, CA · $73 in drug and device payments (2025) · (310) 214-0811
Dr. Joseph Hanna, M.D.
Torrance, CA · $24 in drug and device payments (2025) · (310) 222-2515
Dr. Joyce Yeh, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 214-0811
Dr. Judi Goldstone, MD
Torrance, CA · No drug or device payments recorded (2025) · (424) 247-4962
Dr. Jui-jung Li
Torrance, CA · $138 in drug and device payments (2025) · (310) 375-2256
Dr. July Generoso
Torrance, CA · $118 in drug and device payments (2025) · Telehealth · (310) 792-4400
Dr. Justin Choi, MD
Torrance, CA · $29 in drug and device payments (2025) · (310) 648-1552
Dr. Kaitlin Vick, MD
Torrance, CA · $46 in drug and device payments (2025) · (310) 325-9110
Dr. Kalpana Hool, M.D.
Torrance, CA · $529 in drug and device payments (2025) · Telehealth · (310) 370-1311
Dr. Karen Oh, D.O.
Torrance, CA · No drug or device payments recorded (2025) · (310) 326-1147
Dr. Karen Oppenheimer, M.D.
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 312-2831
Dr. Katherine Miller, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 257-5797
Dr. Kavita Patel
Torrance, CA · $52 in drug and device payments (2025) · (310) 891-6623
Dr. Kazumasa Osato
Torrance, CA · $740 in drug and device payments (2025) · Telehealth · (310) 534-8200
Dr. Kenneth Hernandez, MD
Torrance, CA · $174 in drug and device payments (2025) · (310) 974-9333
Dr. Kenneth Leung, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 265-8422
Dr. Khoi Le, MD
Torrance, CA · $260 in drug and device payments (2025) · (310) 891-6623
Dr. Kimberly Richardson, MD
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 257-0028
Dr. Krista Dollar
Torrance, CA · $298 in drug and device payments (2025) · (310) 222-2345
Dr. Lauren Nguyen, MD
Torrance, CA · $108 in drug and device payments (2025) · (310) 529-9439
Dr. Leslie Oesterich
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2401
Dr. Lillian Chen, M.D.
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 257-0028
Dr. Linda Sharp, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2409
Dr. Lisa Chung, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2409
Dr. Logan Schwarzman
Torrance, CA · $1,982 in drug and device payments (2025) · (310) 222-2345
Dr. Madhu Chatwani, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 373-9980
Dr. Mahnaz Rahbar, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-5015

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.