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 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. Syed Hasan, M.D.Northridge, CA · $83 in drug and device payments (2025) ·
(818) 654-3409 Dr. Tam Huynh, M.D.Northridge, CA · $45 in drug and device payments (2025) · Telehealth ·
(818) 554-7966 Dr. William Josephson, MDNorthridge, CA · $1,174 in drug and device payments (2025) · Telehealth ·
(818) 831-7767 Dr. Erica Kuhn, DONorth Tustin, CA · No drug or device payments recorded (2025) ·
(949) 640-0635 Dr. Germin Soliman, D.O.North Tustin, CA · No drug or device payments recorded (2025) ·
(949) 640-0635 Dr. Aida Salatinjants, M.D. Dr. Chi Vu, MDNorwalk, CA · No drug or device payments recorded (2025) ·
(562) 863-7011 Dr. Hung Phan, MDNorwalk, CA · $126 in drug and device payments (2025) ·
(562) 863-7011 Dr. Jennifer Cruz, NPNorwalk, CA · $330 in drug and device payments (2025) ·
(562) 802-2203 Dr. Kenneth Lee, M.D.Norwalk, CA · $124 in drug and device payments (2025) ·
(562) 867-7999 Dr. Lucita Cruz, MDNorwalk, CA · No drug or device payments recorded (2025) · Telehealth ·
(562) 802-2203 Dr. Martin Zapata, D.ONorwalk, CA · $2,331 in drug and device payments (2025) · Telehealth ·
(562) 806-1214 Dr. Parvaneh Zolnouni, MDNorwalk, CA · No drug or device payments recorded (2025) ·
(562) 863-7011 Dr. Raymond Flores, MDNorwalk, CA · No drug or device payments recorded (2025) ·
(562) 863-7011 Dr. Rosa Reynaga, M.D.Norwalk, CA · No drug or device payments recorded (2025) ·
(562) 207-2270 Dr. Surekha Mishal, M.D.Norwalk, CA · No drug or device payments recorded (2025) ·
(562) 864-7279 Dr. Suzy Sedrak, MDNorwalk, CA · $120 in drug and device payments (2025) ·
(818) 637-2000 Dr. Adaeze Udezue, M.DNovato, CA · No drug or device payments recorded (2025) · Telehealth ·
(415) 878-7200 Dr. Amy Ewing, MDNovato, CA · No drug or device payments recorded (2025) ·
(415) 899-7400 Dr. Amy GuzdarNovato, CA · No drug or device payments recorded (2025) · Telehealth ·
(415) 878-7200 Dr. Barbara Finzen, M.D.Novato, CA · No drug or device payments recorded (2025) ·
(415) 897-9664 Dr. Benjamin Hambro, MDNovato, CA · No drug or device payments recorded (2025) · Telehealth ·
(415) 897-5171 Dr. Carol Devita, RNNovato, CA · No drug or device payments recorded (2025) ·
(415) 710-1340 Dr. Catherine Chin, MDNovato, CA · No drug or device payments recorded (2025) ·
(154) 492-6585 Dr. Clarence Taylor, M.D.Novato, CA · No drug or device payments recorded (2025) ·
(415) 878-7200 Dr. Daniel Ames, M.D.Novato, CA · No drug or device payments recorded (2025) ·
(415) 209-1300 Dr. David Conant, MDNovato, CA · No drug or device payments recorded (2025) · Telehealth ·
(415) 899-7400 Dr. Helen Man-son-hing, MDNovato, CA · No drug or device payments recorded (2025) ·
(415) 899-7400 Dr. Lori Selleck, MDNovato, CA · No drug or device payments recorded (2025) ·
(415) 899-7400 Dr. Louis Livoti, M.D.Novato, CA · No drug or device payments recorded (2025) ·
(415) 892-1043 Dr. Maya Noyman-fain, M.D.Novato, CA · No drug or device payments recorded (2025) ·
(415) 209-1440 Dr. Nushrat Ullah, M.D.Novato, CA · No drug or device payments recorded (2025) ·
(415) 878-7200 Dr. Phyllis Weldon, M.D.Novato, CA · No drug or device payments recorded (2025) ·
(415) 898-6402 Dr. Ranjit Hundal, M.D.Novato, CA · No drug or device payments recorded (2025) ·
(415) 209-1300 Dr. Rebekah Harding, M.D.Novato, CA · No drug or device payments recorded (2025) ·
(415) 448-1500 Dr. Ritu Mukerji-metzger, MD Dr. Robert Lavaysse, MDNovato, CA · No drug or device payments recorded (2025) ·
(415) 899-7400 Dr. Shawn Donald, MDNovato, CA · No drug or device payments recorded (2025) ·
(415) 899-7400 Dr. Teresa Tang, MDNovato, CA · $38 in drug and device payments (2025) · Telehealth ·
(415) 878-7200 Dr. Tuyet Tran, MDNovato, CA · No drug or device payments recorded (2025) ·
(415) 209-1300 Dr. William Elliott, MDNovato, CA · No drug or device payments recorded (2025) ·
(415) 899-7400 Dr. Amulya Belagavi, MDOakdale, CA · No drug or device payments recorded (2025) ·
(303) 390-1940 Dr. Andres Arellano, M.D. Dr. Chaitanya Mahida, M.D.Oakdale, CA · $133 in drug and device payments (2025) · Telehealth ·
(209) 847-0314 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.
- High blood pressure
- Type 2 diabetes
- High cholesterol
- Preventive care
- Chronic disease management
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.
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