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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. Tom-oliver Klein, MD
Chula Vista, CA · $273 in drug and device payments (2025) · (619) 499-2600
Dr. Tracy Lee, D.O.
Chula Vista, CA · $126 in drug and device payments (2025) · (619) 862-6673
Dr. Trisha Patel, DO
Chula Vista, CA · $21 in drug and device payments (2025) · (760) 271-3828
Dr. Vicente Diaz-gonzalez, MD
Chula Vista, CA · $74 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. William Contreras, M.D.
Chula Vista, CA · $28 in drug and device payments (2025) · (858) 499-2616
Dr. Yamile Lozano, MD
Chula Vista, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Aaron Yu, DO
Citrus Heights, CA · $47 in drug and device payments (2025) · Telehealth · (916) 735-4596
Dr. Alla Blinder, D.O
Citrus Heights, CA · No drug or device payments recorded (2025) · Telehealth · (916) 904-3000
Dr. Anwar Saeed, MD
Citrus Heights, CA · $47 in drug and device payments (2025) · Telehealth · (916) 536-3620
Dr. Clara Harris, DO
Citrus Heights, CA · $76 in drug and device payments (2025) · Telehealth · (916) 536-3620
Dr. Daniel Linfesty, M.D.
Citrus Heights, CA · No drug or device payments recorded (2025) · Telehealth · (916) 904-3000
Dr. Ibrahim Yusufu, MD
Citrus Heights, CA · $103 in drug and device payments (2025) · (916) 536-3620
Dr. Jeffrey Yee, MD
Citrus Heights, CA · No drug or device payments recorded (2025) · Telehealth · (916) 560-0209
Dr. Kulvinder Boparai, M.D.
Citrus Heights, CA · No drug or device payments recorded (2025) · (916) 646-1200
Dr. Maan Kathryn Gozun, MD
Citrus Heights, CA · No drug or device payments recorded (2025) · Telehealth · (916) 904-3000
Dr. Patricia Chen, MD
Citrus Heights, CA · No drug or device payments recorded (2025) · Telehealth · (916) 904-3000
Dr. Priyadharshini Narayanan, MD
Citrus Heights, CA · $246 in drug and device payments (2025) · Telehealth · (916) 737-5555
Dr. Sarbjeet Narwan, MD
Citrus Heights, CA · No drug or device payments recorded (2025) · (916) 871-0642
Dr. Surekha Reddy, M.D.
Citrus Heights, CA · $87 in drug and device payments (2025) · (916) 725-1177
Dr. Timothy Beamesderfer, MD
Citrus Heights, CA · No drug or device payments recorded (2025) · (916) 904-3000
Dr. Tyron Arnott, M.D.
Citrus Heights, CA · No drug or device payments recorded (2025) · Telehealth · (916) 904-3000
Dr. Shanthi Iyer
City Of Commerce, CA · No drug or device payments recorded (2025) · (323) 725-7372
Dr. Carlos Garrett, M.D.
City Of Industry, CA · No drug or device payments recorded (2025) · (626) 961-1152
Dr. Chia-yu Teng, M.D.
City Of Industry, CA · $246 in drug and device payments (2025) · Telehealth · (626) 810-7708
Dr. Wei Bao, M.D.
City Of Industry, CA · $5,788 in drug and device payments (2025) · (626) 581-4990
Dr. Ashok Sharma, MD
Claremont, CA · $173 in drug and device payments (2025) · (909) 624-4503
Dr. Thiri Oo, M.D.
Claremont, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. William Morfeld, M.D.
Clayton, CA · No drug or device payments recorded (2025) · (925) 672-5123
Dr. Eric Kim, MD
Clearlake, CA · $21 in drug and device payments (2025) · (707) 994-9191
Dr. Manush Ghazaryan, MD
Clearlake, CA · No drug or device payments recorded (2025) · (707) 995-4500
Dr. Marc Shapiro, MD
Clearlake, CA · No drug or device payments recorded (2025) · (707) 994-7241
Dr. Milagros Tolentino, MD
Clearlake, CA · No drug or device payments recorded (2025) · (707) 994-9469
Dr. Raymond Jennings, MD
Clearlake, CA · No drug or device payments recorded (2025) · (707) 995-4500
Dr. Niranjana Parthasarathi, MD
Cloverdale, CA · No drug or device payments recorded (2025) · (707) 894-4229
Dr. Amita Arora
Clovis, CA · No drug or device payments recorded (2025) · (559) 603-7367
Dr. Amitasha Mann, M.D.
Clovis, CA · $616 in drug and device payments (2025) · (559) 324-6200
Dr. Angela Kuo, MD
Clovis, CA · No drug or device payments recorded (2025) · (559) 324-5100
Dr. Ani Ketabgian, M.D.
Clovis, CA · No drug or device payments recorded (2025) · (559) 299-7294
Dr. Brian Vander Werf, MD
Clovis, CA · No drug or device payments recorded (2025) · (559) 324-4000
Dr. Carl Ahroon, M.D.
Clovis, CA · No drug or device payments recorded (2025) · (559) 323-1610
Dr. Derrick Martin, MD
Clovis, CA · No drug or device payments recorded (2025) · (800) 492-4227
Dr. George Molina, M.D.
Clovis, CA · $104 in drug and device payments (2025) · (559) 297-3333
Dr. Gonzalo Urbano, M.D.
Clovis, CA · $77 in drug and device payments (2025) · Telehealth · (559) 299-2578
Dr. Hardeep Chohan, MD
Clovis, CA · No drug or device payments recorded (2025) · (559) 324-5100
Dr. Harjeet Dhaliwal, M.D.
Clovis, CA · No drug or device payments recorded (2025) · (559) 297-1322
Dr. Hongwei Chen, M.D.
Clovis, CA · $123 in drug and device payments (2025) · Telehealth · (559) 323-8370
Dr. Insiya Rasiwala, M.D.
Clovis, CA · No drug or device payments recorded (2025) · (559) 324-4000
Dr. Jai-joon Oh, M.D.
Clovis, CA · No drug or device payments recorded (2025) · (559) 299-6862
Dr. Juan De La Cruz Mayhua
Clovis, CA · No drug or device payments recorded (2025) · (310) 590-5841
Dr. Lee Copeland, M.D.
Clovis, CA · $1,138 in drug and device payments (2025) · (559) 570-0070

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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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.