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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. Brian Morris, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-4881
Dr. Bruce Gillis, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 268-1001
Dr. Bruce Landres, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 481-0481
Dr. Bryan Hernandez, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 666-6055
Dr. Bryan Kim, MD
Los Angeles, CA · $58 in drug and device payments (2025) · (424) 467-6764
Dr. Bryan Lam, MD
Los Angeles, CA · $125 in drug and device payments (2025) · (323) 783-4516
Dr. Byung Ji, MD
Los Angeles, CA · $125 in drug and device payments (2025) · (310) 825-2448
Dr. Cage Johnson
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 226-2170
Dr. Caleb Lowe, DO
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 563-4987
Dr. Calvin Kim, MD
Los Angeles, CA · $102 in drug and device payments (2025) · (213) 487-4141
Dr. Calvin Yang, M.D.
Los Angeles, CA · $39 in drug and device payments (2025) · (800) 954-8000
Dr. Camelia Davtyan, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0631
Dr. Cameron Furey, M.D.
Los Angeles, CA · $1,190 in drug and device payments (2025) · (213) 977-2121
Dr. Cameron Quon, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 409-7556
Dr. Carl Burton, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-8272
Dr. Carlos Irwin Oronce
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 478-3711
Dr. Carlos Martinez, MD
Los Angeles, CA · $695 in drug and device payments (2025) · (213) 385-9912
Dr. Carlos Silva Lynch, MD
Los Angeles, CA · $119 in drug and device payments (2025) · (323) 653-1990
Dr. Carmen Heath, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Carol Castro, MD
Los Angeles, CA · $46 in drug and device payments (2025) · (213) 977-2121
Dr. Carol Chung, DO
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-6301
Dr. Carolin Girgis, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 268-5000
Dr. Carol Mangione, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-6301
Dr. Carol Ray-malone, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Carol Richardson-te, M.D.
Los Angeles, CA · $345 in drug and device payments (2025) · (213) 977-0511
Dr. Carolyn Crandall, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-8069
Dr. Carolyn Drake, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-2811
Dr. Catherine Lin, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 869-1900
Dr. Cecilia Nguyen, BS
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 319-4698
Dr. Celeste Emont, M.D
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 473-4124
Dr. Cesar Gonzalez
Los Angeles, CA · $372 in drug and device payments (2025) · (760) 419-4426
Dr. Cesar Palana, MD
Los Angeles, CA · $230 in drug and device payments (2025) · (323) 457-3787
Dr. Chaitali Mukherjee, M.D.
Los Angeles, CA · $22 in drug and device payments (2025) · (310) 825-4073
Dr. Chang Yoon Kim, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (800) 954-8000
Dr. Chao-hsiung Yang, MD
Los Angeles, CA · $64 in drug and device payments (2025) · (323) 226-2345
Dr. Chao Huang, D.O.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 354-4320
Dr. Charles Burstin, M.D.
Los Angeles, CA · $28 in drug and device payments (2025) · (424) 230-5377
Dr. Charles Friedman, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 476-7172
Dr. Charles Shumaker, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 409-7556
Dr. Charles Thomas, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 226-7556
Dr. Chelsea Benmessaoud, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-2202
Dr. Cher Huang, MD
Los Angeles, CA · $581 in drug and device payments (2025) · (310) 825-9111
Dr. Chia-yi Lee, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-5581
Dr. Chih-hsin Chen, M.D.
Los Angeles, CA · $397 in drug and device payments (2025) · (323) 226-7556
Dr. Chinelo Ogbogu
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 846-4312
Dr. Chinyere Nyenke, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 732-4224
Dr. Chong Kim
Los Angeles, CA · No drug or device payments recorded (2025) · (714) 673-4188
Dr. Christina Harris, MD
Los Angeles, CA · $2,227 in drug and device payments (2025) · (310) 423-6321
Dr. Christina Ortega-chen
Los Angeles, CA · No drug or device payments recorded (2025) · (818) 826-9630
Dr. Christina Tadrous, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 268-5000

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.