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. Susan Kubica, MDMonterey, CA · $218 in drug and device payments (2025) · Telehealth ·
(831) 372-1188 Dr. Yalda Ataie, M.DMonterey, CA · No drug or device payments recorded (2025) ·
(831) 333-3040 Dr. Yosuf Subat, MD, MPHMonterey, CA · $147 in drug and device payments (2025) ·
(831) 333-3040 Dr. Alexander Pi, D.O.Monterey Park, CA · $443 in drug and device payments (2025) ·
(626) 662-7272 Dr. Angela Chiang, M.D.Monterey Park, CA · $420 in drug and device payments (2025) ·
(626) 573-2222 Dr. Charles Hung, M.D.Monterey Park, CA · No drug or device payments recorded (2025) ·
(626) 280-4588 Dr. Chi Lam, MDMonterey Park, CA · No drug or device payments recorded (2025) ·
(626) 571-4013 Dr. Cindy Shu, MDMonterey Park, CA · No drug or device payments recorded (2025) ·
(626) 573-3344 Dr. Edward Chang, MDMonterey Park, CA · $56 in drug and device payments (2025) ·
(626) 318-5099 Dr. Eric CuiMonterey Park, CA · No drug or device payments recorded (2025) ·
(626) 573-2222 Dr. Henry Luh, MDMonterey Park, CA · No drug or device payments recorded (2025) ·
(626) 571-5955 Dr. Htoo Htoo Aung, MDMonterey Park, CA · $33 in drug and device payments (2025) · Telehealth ·
(626) 573-2222 Dr. Jason Wong, MDMonterey Park, CA · $346 in drug and device payments (2025) ·
(626) 280-4393 Dr. Jorge Weingarten, MDMonterey Park, CA · No drug or device payments recorded (2025) ·
(323) 889-6638 Dr. Justin Tran, MDMonterey Park, CA · No drug or device payments recorded (2025) ·
(626) 573-2222 Dr. Kendrick Ng, DOMonterey Park, CA · No drug or device payments recorded (2025) ·
(626) 281-9111 Dr. Kyle Punzalan, MDMonterey Park, CA · No drug or device payments recorded (2025) ·
(626) 280-1181 Dr. Li Liu, M.D.Monterey Park, CA · $3,384 in drug and device payments (2025) · Telehealth ·
(626) 307-7497 Dr. Lukchai Bhavabhutanon, D.O.Monterey Park, CA · $363 in drug and device payments (2025) ·
(626) 300-8424 Dr. Michael Choi, M.D.Monterey Park, CA · $162 in drug and device payments (2025) ·
(877) 358-5841 Dr. Montreh Tavakkoli, MDMonterey Park, CA · $26 in drug and device payments (2025) ·
(310) 400-0645 Dr. Nam TranMonterey Park, CA · No drug or device payments recorded (2025) ·
(714) 471-3799 Dr. Nicole Ward, DOMonterey Park, CA · $19 in drug and device payments (2025) ·
(818) 806-8830 Dr. Pen Hong Lee, MDMonterey Park, CA · No drug or device payments recorded (2025) ·
(626) 571-6641 Dr. Randall Chan, MDMonterey Park, CA · $27 in drug and device payments (2025) ·
(626) 573-2222 Dr. Robert Tzeng, MDMonterey Park, CA · $1,380 in drug and device payments (2025) · Telehealth ·
(626) 572-8626 Dr. Shasha Jiang, MDMonterey Park, CA · $137 in drug and device payments (2025) ·
(626) 300-9980 Dr. Sunny Wong, D.O.Monterey Park, CA · $311 in drug and device payments (2025) · Telehealth ·
(626) 307-0676 Dr. Terry Kuo, M.D.Monterey Park, CA · No drug or device payments recorded (2025) ·
(626) 281-6969 Dr. Than Lin, D.OMonterey Park, CA · $52 in drug and device payments (2025) ·
(626) 280-0676 Dr. Thomas Tseng, DOMonterey Park, CA · $885 in drug and device payments (2025) · Telehealth ·
(626) 289-9478 Dr. Tom Giang, M.D.Monterey Park, CA · No drug or device payments recorded (2025) ·
(626) 280-2533 Dr. Wan Yao, M.D.Monterey Park, CA · $331 in drug and device payments (2025) ·
(626) 288-3219 Dr. Wei Wang, MDMonterey Park, CA · $233 in drug and device payments (2025) ·
(626) 288-7988 Dr. Xiang-hong Lin, MDMonterey Park, CA · $488 in drug and device payments (2025) ·
(626) 288-0091 Dr. Zetan Nie, M.D., PH.D.Monterey Park, CA · $341 in drug and device payments (2025) ·
(626) 288-6888 Dr. Zhehua Xu, M.D.Monterey Park, CA · $392 in drug and device payments (2025) ·
(626) 288-3992 Dr. Jan Yuo, M.D., M.P.H.Montrose, CA · No drug or device payments recorded (2025) ·
(818) 330-9960 Dr. Mark Winkler, MDMoorpark, CA · No drug or device payments recorded (2025) ·
(818) 882-5375 Dr. Amanpreet Dulai, MDMoreno Valley, CA · $14 in drug and device payments (2025) · Telehealth ·
(951) 247-5809 Dr. Antonio Tan, M.D.Moreno Valley, CA · $2,294 in drug and device payments (2025) · Telehealth ·
(951) 485-2744 Dr. Armando Franco, MDMoreno Valley, CA · No drug or device payments recorded (2025) · Telehealth ·
(951) 485-5155 Dr. Bhavdeep Singh, DOMoreno Valley, CA · No drug or device payments recorded (2025) ·
(951) 486-4000 Dr. Brittany Raynor, DOMoreno Valley, CA · No drug or device payments recorded (2025) ·
(951) 486-4000 Dr. Ciara Catherine Fulgar, DOMoreno Valley, CA · No drug or device payments recorded (2025) ·
(951) 486-4000 Dr. Cuong Nguyen, MDMoreno Valley, CA · $109 in drug and device payments (2025) ·
(951) 571-8518 Dr. Daniel Kim, M.D.Moreno Valley, CA · $305 in drug and device payments (2025) ·
(951) 486-4000 Dr. Daniel Solis, MDMoreno Valley, CA · $1,252 in drug and device payments (2025) · Telehealth ·
(800) 720-9553 Dr. Daren Rudisaile, M.D.Moreno Valley, CA · No drug or device payments recorded (2025) ·
(951) 486-4000 Dr. Dat To, MDMoreno Valley, CA · No drug or device payments recorded (2025) ·
(951) 486-5700 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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