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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. Gerson Stauber, MD
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 635-4120
Dr. Grace Chun, MD
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 631-3000
Dr. Hemal Amin, M.D.
Rancho Cordova, CA · $1,529 in drug and device payments (2025) · Telehealth · (916) 792-4103
Dr. James Foster, MD
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 631-3000
Dr. Jennifer Choy, DO
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 631-3000
Dr. Josefina Aquino, M.D.
Rancho Cordova, CA · $732 in drug and device payments (2025) · (916) 852-6001
Dr. Kali Eswaran, M.D.
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 852-6001
Dr. Michael Li, M.D.
Rancho Cordova, CA · No drug or device payments recorded (2025) · Telehealth · (916) 836-6563
Dr. Nicholas Fancher, MD
Rancho Cordova, CA · $22 in drug and device payments (2025) · Telehealth · (916) 734-2362
Dr. Robert Richter, MD
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 631-3000
Dr. Samanda Durand, D.O.
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 817-1462
Dr. Saraswathy Balasingam, M.D.
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 852-6001
Dr. Steven Friend, MD
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 469-9038
Dr. Sultan Yusufzai, M.D.
Rancho Cordova, CA · $2,668 in drug and device payments (2025) · Telehealth · (916) 704-5898
Dr. Tomasz Rodkiewicz, MD
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 631-3000
Dr. Vasudeva Desai, M.D.
Rancho Cordova, CA · No drug or device payments recorded (2025) · (916) 859-9934
Dr. Carlos Vigil, DO
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (909) 941-0661
Dr. Catherine Joy Cabugao
Rancho Cucamonga, CA · $115 in drug and device payments (2025) · (909) 466-8888
Dr. Cong Phan, M.D.
Rancho Cucamonga, CA · $540 in drug and device payments (2025) · Telehealth · (909) 484-4900
Dr. Hetalben Makwana, MD
Rancho Cucamonga, CA · $264 in drug and device payments (2025) · (909) 981-0989
Dr. Mohamed Ali, M.D.
Rancho Cucamonga, CA · $22 in drug and device payments (2025) · Telehealth · (909) 481-0800
Dr. Nena Arciaga
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (818) 532-2222
Dr. Nyein Tint, M.D.
Rancho Cucamonga, CA · $1,309 in drug and device payments (2025) · Telehealth · (909) 987-2528
Dr. Raheel Sayed
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (928) 278-7267
Dr. Rishi Talwar, MD
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (909) 941-0661
Dr. Tarek Ezzeddine, MD
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · Telehealth · (909) 360-4722
Dr. Teri Rhetta, M.D.
Rancho Cucamonga, CA · No drug or device payments recorded (2025) · (951) 335-3769
Dr. Yangdong He
Rancho Cucamonga, CA · $43 in drug and device payments (2025) · (734) 358-2738
Dr. Ythanh Nguyen, MD
Rancho Cucamonga, CA · $136 in drug and device payments (2025) · (909) 484-4900
Dr. Akash Patel
Rancho Mirage, CA · $85 in drug and device payments (2025) · (760) 333-1813
Dr. Alex Kelemework, M.D.
Rancho Mirage, CA · $41 in drug and device payments (2025) · (760) 837-8905
Dr. Alireza Ghotb, M.D.
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 340-3911
Dr. Arbatel De La Cuesta, M.D.
Rancho Mirage, CA · $15 in drug and device payments (2025) · Telehealth · (760) 834-7900
Dr. Arek Touloumdjian, MD
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 895-2699
Dr. Asha Nath, MD
Rancho Mirage, CA · $21 in drug and device payments (2025) · (760) 779-1721
Dr. Bland Ahmed
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 340-3911
Dr. Brian Manjarres, M.D.
Rancho Mirage, CA · $117 in drug and device payments (2025) · (760) 321-1315
Dr. Carlos Lopez, M.D.,M.P.H.
Rancho Mirage, CA · $205 in drug and device payments (2025) · (760) 773-9750
Dr. Christian Lu
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 333-1813
Dr. David Ko, MD
Rancho Mirage, CA · $5,861 in drug and device payments (2025) · Telehealth · (760) 346-5688
Dr. Eliane Coffler
Rancho Mirage, CA · $196 in drug and device payments (2025) · (760) 814-9823
Dr. Elika Shahkamrani, MD
Rancho Mirage, CA · No drug or device payments recorded (2025) · Telehealth · (760) 333-1813
Dr. Eric Sanderson, M.D.
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 346-3498
Dr. Hessam Mahdavi, MD
Rancho Mirage, CA · $120 in drug and device payments (2025) · (760) 674-3818
Dr. Joel Hirschberg, MD
Rancho Mirage, CA · $117 in drug and device payments (2025) · (760) 340-6660
Dr. John Samples, MD
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 834-7900
Dr. Joseph Sanchez, MD
Rancho Mirage, CA · $94 in drug and device payments (2025) · (760) 834-7987
Dr. Joshua Imperio, MD
Rancho Mirage, CA · No drug or device payments recorded (2025) · (760) 834-7900
Dr. Karen Banks, DO
Rancho Mirage, CA · $52 in drug and device payments (2025) · (760) 833-7977
Dr. Kavita Sinha, MD
Rancho Mirage, CA · No drug or device payments recorded (2025) · (330) 493-4443

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.