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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. Jonathan Sosnov, M.D.
Mcclellan, CA · No drug or device payments recorded (2025) · (707) 423-3000
Dr. Moon Jeu, M.D.
Mcclellan, CA · No drug or device payments recorded (2025) · (916) 561-7560
Dr. Sylvia Beamesderfer, M.D.
Mcclellan, CA · No drug or device payments recorded (2025) · (800) 382-8387
Dr. Tito Tanguilig, M.D.
Mcclellan, CA · No drug or device payments recorded (2025) · (916) 561-7400
Dr. Zin Nwe Nwe Tun, M.D
Mcclellan, CA · $125 in drug and device payments (2025) · (916) 561-7400
Dr. Zoraida Soriano, M.D.
Mcclellan, CA · No drug or device payments recorded (2025) · (916) 561-7400
Dr. Jane Addagatla, MD
Mcclellan Park, CA · No drug or device payments recorded (2025) · (916) 561-7400
Dr. Horst Mehner, M.D.
Meadow Vista, CA · No drug or device payments recorded (2025) · (530) 878-8312
Dr. Palma Wideman, M.D.
Meadow Vista, CA · No drug or device payments recorded (2025) · (530) 878-6361
Dr. William Tellman, MD
Meadow Vista, CA · No drug or device payments recorded (2025) · (530) 878-6293
Dr. Frederick Dumas, M.D.
Mendocino, CA · No drug or device payments recorded (2025) · (707) 937-4202
Dr. Jeffrey Berenson, MD
Mendocino, CA · No drug or device payments recorded (2025) · Telehealth · (707) 937-1055
Dr. Jennifer Stewart, MD
Mendocino, CA · No drug or device payments recorded (2025) · (707) 937-1022
Dr. Jasdave Maan, MD
Mendota, CA · No drug or device payments recorded (2025) · (559) 424-0160
Dr. Raman Mattu, M.D.
Mendota, CA · $14 in drug and device payments (2025) · (559) 655-5000
Dr. Salar Tofighi, MD
Mendota, CA · $25 in drug and device payments (2025) · (559) 424-0610
Dr. Christine Nguyen, M.D.
Menifee, CA · $98 in drug and device payments (2025) · Telehealth · (951) 301-9339
Dr. James Kingsley, MD
Menifee, CA · No drug or device payments recorded (2025) · Telehealth · (951) 679-7022
Dr. Jose Paulo Luigi Banzon, MD
Menifee, CA · $371 in drug and device payments (2025) · (951) 301-3588
Dr. Kamaldeep Panach, M.D.
Menifee, CA · $801 in drug and device payments (2025) · Telehealth · (951) 672-1911
Dr. Laura Holzer, M.D.
Menifee, CA · $211 in drug and device payments (2025) · Telehealth · (714) 202-2330
Dr. Palak Pancholi, MD
Menifee, CA · $756 in drug and device payments (2025) · (951) 414-4020
Dr. Sasank Nakka, MD
Menifee, CA · No drug or device payments recorded (2025) · (951) 282-1328
Dr. Tomas Araneta, M.D.
Menifee, CA · $210 in drug and device payments (2025) · Telehealth · (951) 301-1100
Dr. Alan Pinyavat, MD
Menlo Park, CA · No drug or device payments recorded (2025) · Telehealth · (650) 498-6500
Dr. Amy Saltzman, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (659) 575-5780
Dr. Andrzej Chruscinski, M.D., PH.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 387-8748
Dr. Anthony Powell, MD
Menlo Park, CA · No drug or device payments recorded (2025) · Telehealth · (650) 498-6500
Dr. Aurel Kleinerman, M.D., PH.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 323-1500
Dr. Cindy Lamar, MD
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 322-2227
Dr. David Pizzuti, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 269-7626
Dr. Debra St Claire, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 521-0444
Dr. Eileen Moy, MD
Menlo Park, CA · $81 in drug and device payments (2025) · Telehealth · (650) 498-6166
Dr. Eliza Bennitt, MD
Menlo Park, CA · No drug or device payments recorded (2025) · Telehealth · (650) 498-6649
Dr. Eve Henry, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 644-8582
Dr. F Mcdowell, MD
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 498-6500
Dr. Geoffrey Rutledge, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 868-0197
Dr. George Smith, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (888) 663-6331
Dr. Gity Meshkat Razavi, MD,
Menlo Park, CA · $184 in drug and device payments (2025) · (650) 566-1936
Dr. Harlan Matles, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 391-0500
Dr. Jacqueline To, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · Telehealth · (650) 585-3272
Dr. Janushe Patel
Menlo Park, CA · $108 in drug and device payments (2025) · (888) 663-6331
Dr. Jasmine Burke, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · (530) 841-6280
Dr. Jaya Virmani, MD
Menlo Park, CA · $76 in drug and device payments (2025) · (650) 327-3000
Dr. Jean Waltuch, MD
Menlo Park, CA · No drug or device payments recorded (2025) · Telehealth · (650) 498-6500
Dr. Jessica Buesing, MD
Menlo Park, CA · No drug or device payments recorded (2025) · Telehealth · (650) 498-7489
Dr. John Hornberger, MD, MS
Menlo Park, CA · No drug or device payments recorded (2025) · (650) 493-5000
Dr. Kevin Kuo, MD
Menlo Park, CA · No drug or device payments recorded (2025) · Telehealth · (650) 724-3660
Dr. Kevin Wallace, MD
Menlo Park, CA · No drug or device payments recorded (2025) · Telehealth · (650) 498-6500
Dr. Kristen Sherman, M.D.
Menlo Park, CA · No drug or device payments recorded (2025) · Telehealth · (650) 498-7080

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.