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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. Cara Wilson, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (424) 392-6060
Dr. Carl Feld, MD
Torrance, CA · $21 in drug and device payments (2025) · (310) 374-8191
Dr. Carlos Rodriguez, MD
Torrance, CA · $22 in drug and device payments (2025) · (310) 303-6833
Dr. Carmen Mendez, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2401
Dr. Chad Sparks, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 325-9110
Dr. Charis Tjoeng, DO
Torrance, CA · $181 in drug and device payments (2025) · (424) 306-4000
Dr. Charles Pham
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2401
Dr. Cherlyn Perez-corral, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2401
Dr. Chong Kim, MD
Torrance, CA · $40 in drug and device payments (2025) · (424) 328-0203
Dr. Cho Rok Kim, M.D.
Torrance, CA · $561 in drug and device payments (2025) · Telehealth · (310) 784-6300
Dr. Christian Zayek, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 214-0811
Dr. Christopher Armenia, MD
Torrance, CA · $1,108 in drug and device payments (2025) · (518) 727-6785
Dr. Christopher Brown, MD, MPH
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2401
Dr. Christopher Lynch, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-5597
Dr. Chris Tsuneishi, M.D.
Torrance, CA · $623 in drug and device payments (2025) · (310) 543-1050
Dr. Cindy Kim, MD
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 543-7025
Dr. Claire Park, MD
Torrance, CA · $60 in drug and device payments (2025) · (310) 222-1867
Dr. Clark Soderlund, M.D.
Torrance, CA · $552 in drug and device payments (2025) · Telehealth · (319) 214-0811
Dr. Colleen Hamilton, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2345
Dr. Curtis Lee, MD
Torrance, CA · $17 in drug and device payments (2025) · Telehealth · (310) 370-4337
Dr. Daniel Temianka, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 354-4225
Dr. Daniel Turner-lloveras, MD
Torrance, CA · $3,500 in drug and device payments (2025) · (424) 306-4558
Dr. David Tawfik, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2401
Dr. David Weiss, M.D.
Torrance, CA · $23 in drug and device payments (2025) · Telehealth · (310) 325-9200
Dr. Deborah Unger, MD
Torrance, CA · No drug or device payments recorded (2025) · (615) 933-3011
Dr. Debra Myers, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 995-7682
Dr. Deepak Singh, M.D.
Torrance, CA · $191 in drug and device payments (2025) · (310) 325-9110
Dr. Duong Hua, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2401
Dr. Edward Wilson, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 325-9110
Dr. Elias Khawam, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 214-0811
Dr. Elva Dreisbach, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 257-2598
Dr. Emiley Chang, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-4374
Dr. Emily Fritzmann, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2345
Dr. Emily Nguyen, DO
Torrance, CA · $23 in drug and device payments (2025) · Telehealth · (800) 403-4160
Dr. Eric Munro, M.D.
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 378-2234
Dr. Eric Yang, MD
Torrance, CA · $93 in drug and device payments (2025) · (310) 784-5880
Dr. Erika Kalash, D.O.
Torrance, CA · $114 in drug and device payments (2025) · (310) 214-0811
Dr. Ernest Lee
Torrance, CA · $182 in drug and device payments (2025) · (310) 891-6623
Dr. Esther Joo, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (301) 758-2801
Dr. Farhan Husain
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2345
Dr. Frederick Santiago, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 784-8770
Dr. Gene Yoshikawa, MD
Torrance, CA · $1,005 in drug and device payments (2025) · (424) 306-8220
Dr. Giulianna Nguyen, M.D.
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 326-9167
Dr. Grace Pasiliao, MD
Torrance, CA · No drug or device payments recorded (2025) · (951) 500-1342
Dr. Grant Chu, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 257-0129
Dr. Gulzar Fidai, MD
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 214-0811
Dr. Gurveen Sandhu
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 257-0028
Dr. Hebert Claude, D.O
Torrance, CA · No drug or device payments recorded (2025) · (310) 540-7676
Dr. Hicham Siouty, MD
Torrance, CA · $1,469 in drug and device payments (2025) · Telehealth · (310) 325-3084
Dr. Huy Do, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-0000

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.