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. Sina Milani, MDFountain Valley, CA · $120 in drug and device payments (2025) · Telehealth ·
(714) 549-1300 Dr. Smitha Daka, M.DFountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 964-6229 Dr. Stanley Arnold, MDFountain Valley, CA · $31 in drug and device payments (2025) ·
(714) 965-2500 Dr. Stanley NguyenFountain Valley, CA · No drug or device payments recorded (2025) ·
(949) 340-9530 Dr. Steven Chacko, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(877) 279-5289 Dr. Su Yong Kuo, MDFountain Valley, CA · $59 in drug and device payments (2025) ·
(714) 545-9110 Dr. Tamara Fogarty, MDFountain Valley, CA · $395 in drug and device payments (2025) ·
(714) 965-2500 Dr. Tenzing Wangyal, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 964-6229 Dr. Tokameh Entezari, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(949) 340-9530 Dr. Tracy Tran, DOFountain Valley, CA · $431 in drug and device payments (2025) · Telehealth ·
(714) 966-7200 Dr. Truong-sinh Leduc, M.D.Fountain Valley, CA · $11,449 in drug and device payments (2025) ·
(714) 540-0105 Dr. Vamsi VemireddyFountain Valley, CA · No drug or device payments recorded (2025) ·
(877) 844-0012 Dr. Victor Lin, MDFountain Valley, CA · $62 in drug and device payments (2025) ·
(714) 965-2500 Dr. Viney Soni, M.DFountain Valley, CA · $1,903 in drug and device payments (2025) · Telehealth ·
(714) 545-8700 Dr. Wasim Raja, M.D.Fountain Valley, CA · $21 in drug and device payments (2025) ·
(714) 486-3477 Dr. Ziad Chaya, D.O.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(657) 241-3592 Dr. Kulraj Sidhu, M.D.Fowler, CA · No drug or device payments recorded (2025) ·
(559) 892-9452 Dr. Francisco Ravago, MDFreedom, CA · $1,195 in drug and device payments (2025) · Telehealth ·
(831) 724-7521 Dr. Jeric Villaruz, MDFreedom, CA · No drug or device payments recorded (2025) ·
(831) 728-0440 Dr. Marylou Romo-gritzewsky, M.D.Freedom, CA · $2,420 in drug and device payments (2025) · Telehealth ·
(831) 728-0440 Dr. Prabodh Rathi, MDFreedom, CA · No drug or device payments recorded (2025) · Telehealth ·
(831) 319-4194 Dr. Albert Wang, M.D.Fremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Amanda Le, MDFremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Amanjot Sidhu, M.D.Fremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Amy Lin, MDFremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Ana Elisei, MDFremont, CA · No drug or device payments recorded (2025) ·
(510) 657-2086 Dr. Andrew Mehta, MDFremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Andrew Nadler, MDFremont, CA · No drug or device payments recorded (2025) ·
(510) 795-3000 Dr. Anita Bhandia, M.D.Fremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Ann Phan, DOFremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Anupama Reddy, MDFremont, CA · $134 in drug and device payments (2025) ·
(510) 490-1222 Dr. Aparna Gulati, MDFremont, CA · No drug or device payments recorded (2025) ·
(510) 795-3000 Dr. Ashwani Bindal, MDFremont, CA · No drug or device payments recorded (2025) ·
(510) 796-8811 Dr. Bala Annadurai, M.D.Fremont, CA · $642 in drug and device payments (2025) · Telehealth ·
(510) 574-0800 Dr. Benito Valencia, M.D.Fremont, CA · $40 in drug and device payments (2025) · Telehealth ·
(510) 792-1977 Dr. Candy Wong, MDFremont, CA · No drug or device payments recorded (2025) ·
(510) 248-1000 Dr. Catalina HongFremont, CA · No drug or device payments recorded (2025) ·
(510) 248-3000 Dr. Chai-kiong Lau, M.D.Fremont, CA · No drug or device payments recorded (2025) ·
(510) 742-0568 Dr. Chuan Fang Shih, M.D.Fremont, CA · $303 in drug and device payments (2025) · Telehealth ·
(510) 790-2202 Dr. Clifford Kim, M.D.Fremont, CA · No drug or device payments recorded (2025) ·
(510) 791-4000 Dr. Connie Lee, MDFremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Corrynne Yamanaka, MDFremont, CA · No drug or device payments recorded (2025) ·
(510) 795-3000 Dr. Cuiping Li, MDFremont, CA · $126 in drug and device payments (2025) ·
(856) 641-6091 Dr. Dana Beausang, M.D.Fremont, CA · $40 in drug and device payments (2025) · Telehealth ·
(510) 490-1222 Dr. Daniel Hsu, DOFremont, CA · $170 in drug and device payments (2025) ·
(510) 795-3000 Dr. Daniel Taylor, M.D.Fremont, CA · $660 in drug and device payments (2025) ·
(510) 713-0628 Dr. Deepti Nagaraja Rao, MDFremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Delphine Huang, MDFremont, CA · No drug or device payments recorded (2025) ·
(510) 795-3000 Dr. Devindar Singh, M.D.Fremont, CA · No drug or device payments recorded (2025) ·
(510) 796-0770 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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