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. Kieran Branch, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Lauren Macaraeg, M.D.Daly City, CA · $1,999 in drug and device payments (2025) · Telehealth ·
(650) 755-4490 Dr. Leslie Moretti, M.D.Daly City, CA · No drug or device payments recorded (2025) ·
(650) 992-8500 Dr. Linda Okamoto, DODaly City, CA · No drug or device payments recorded (2025) ·
(650) 301-5912 Dr. Lisa Tsang, M.D.Daly City, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 652-8500 Dr. Maria Yeh, D.O.Daly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Martin Robles Magana, MD, MPHDaly City, CA · No drug or device payments recorded (2025) ·
(650) 550-3923 Dr. Michael Mcnamara, M.D.Daly City, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 652-8500 Dr. Ognjen Petras, M.D.Daly City, CA · No drug or device payments recorded (2025) ·
(650) 301-0556 Dr. Raymond Velasco, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 993-8800 Dr. Reshmin Ashraf, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 550-3923 Dr. Richard Moskowitz, MDDaly City, CA · $58 in drug and device payments (2025) ·
(650) 991-1842 Dr. Roy Quinones, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 301-8600 Dr. Sandar HtunDaly City, CA · No drug or device payments recorded (2025) ·
(650) 550-3923 Dr. Sayyida Abdus-salaam, M.D.Daly City, CA · No drug or device payments recorded (2025) ·
(937) 304-3877 Dr. Scott Tsunehara, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Shu May Lee, M.D.Daly City, CA · $385 in drug and device payments (2025) ·
(650) 755-2690 Dr. Stephanie Kang, DODaly City, CA · No drug or device payments recorded (2025) ·
(415) 680-4135 Dr. Susan Mah, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Teresita Degamo, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 550-3923 Dr. Terrelea Wong, MDDaly City, CA · $587 in drug and device payments (2025) ·
(650) 742-2000 Dr. Theodor Parada, M.D.Daly City, CA · No drug or device payments recorded (2025) ·
(650) 757-2121 Dr. Tony Wong, M.D.Daly City, CA · $3,624 in drug and device payments (2025) ·
(650) 992-5300 Dr. Weizhao Zhou, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Yin-yin Myint, M.D.Daly City, CA · $388 in drug and device payments (2025) ·
(650) 992-2890 Dr. Laurence Wellikson, M.D.Dana Point, CA · No drug or device payments recorded (2025) ·
(949) 400-4453 Dr. Rajiv Pathak, M.D.Dana Point, CA · $455 in drug and device payments (2025) · Telehealth ·
(949) 240-2555 Dr. Usha Idnani, M.D.Dana Point, CA · No drug or device payments recorded (2025) ·
(949) 276-6499 Dr. Amit Garg, MDDanville, CA · $126 in drug and device payments (2025) ·
(847) 347-6579 Dr. Carol Lamb, M.D.Danville, CA · No drug or device payments recorded (2025) ·
(925) 648-7140 Dr. Chelsea Bowman, M.D.Danville, CA · $19 in drug and device payments (2025) · Telehealth ·
(925) 875-3750 Dr. Christine Chang, M.D.Danville, CA · $188 in drug and device payments (2025) · Telehealth ·
(925) 648-7140 Dr. Clifford Sewell, M.D.Danville, CA · $110 in drug and device payments (2025) · Telehealth ·
(925) 855-3780 Dr. Denise Hilliard, M.D.Danville, CA · $21 in drug and device payments (2025) ·
(925) 837-1044 Dr. Donald Parsons, MDDanville, CA · No drug or device payments recorded (2025) ·
(925) 855-3780 Dr. Jacqueline Jayan, M.D.Danville, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 875-3750 Dr. Lee Eisan, MDDanville, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 837-7409 Dr. Lisa Hudson, M.D.Danville, CA · $92 in drug and device payments (2025) ·
(925) 984-2622 Dr. Margo Estrin, M.D.Danville, CA · No drug or device payments recorded (2025) ·
(925) 837-6006 Dr. Mark Reginato, M.D.Danville, CA · $3,389 in drug and device payments (2025) · Telehealth ·
(925) 736-7070 Dr. Neil Okamura, D.O.Danville, CA · $911 in drug and device payments (2025) · Telehealth ·
(925) 380-6211 Dr. Nimish Patel, D.O.Danville, CA · No drug or device payments recorded (2025) ·
(650) 935-4173 Dr. Pamela Wang, M.D.Danville, CA · $989 in drug and device payments (2025) · Telehealth ·
(925) 820-6456 Dr. Philip FischbacherDanville, CA · No drug or device payments recorded (2025) ·
(925) 899-6044 Dr. Priti Parekh, MDDanville, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 314-0260 Dr. Priya Swamy, D.O.Danville, CA · $627 in drug and device payments (2025) · Telehealth ·
(925) 648-7144 Dr. Sonal Advani, MDDanville, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 875-3750 Dr. Steven Sheh, M.D., M.S.Danville, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 875-3750 Dr. Allison Alcalay, M.D.Davis, CA · No drug or device payments recorded (2025) · Telehealth ·
(530) 750-5904 Dr. Anca Knoepfler, M.D.Davis, CA · No drug or device payments recorded (2025) · Telehealth ·
(530) 747-3000 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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