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. Teresa Vitro-braccini, D.O.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Teri Alyami, MDOakland, CA · $555 in drug and device payments (2025) ·
(510) 752-1000 Dr. Terrie Rowen, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Terry Stein, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 987-1000 Dr. Thai NguyenOakland, CA · No drug or device payments recorded (2025) ·
(510) 451-0996 Dr. Thomas Baudendistel, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Thomas Chen, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Thomas Hackford, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Thomas Sharpton, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Thomas Yun, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 437-4965 Dr. Tim Jones, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Timothy Litwin, D.O.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-3800 Dr. Tolbert Small, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 777-1177 Dr. Tracy Bae, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Trivianne Franklin, DOOakland, CA · $142 in drug and device payments (2025) ·
(682) 380-3636 Dr. Uchenna Okoronkwo, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 569-7326 Dr. Upasna Swift, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-5126 Dr. Uzma Najmuddin, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Van Huynh, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Veesta FalahatiOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Victor Silvestre, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Vijay AluruOakland, CA · $195 in drug and device payments (2025) ·
(510) 869-6883 Dr. Walter Acuna, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. William De Wolf, M.D.Oakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 204-8290 Dr. William Johnson, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 658-4425 Dr. Wilson Tse, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Wilson Yan, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-7867 Dr. Win Chang, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4780 Dr. Xiaoguang Huang, M.D., PHD.Oakland, CA · $523 in drug and device payments (2025) · Telehealth ·
(510) 663-9518 Dr. Yana Meltser, D.O.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 805-2350 Dr. Yasmeen Kaghazwala, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Yasmin BainsOakland, CA · $201 in drug and device payments (2025) ·
(510) 437-4800 Dr. Yee-bun Lui, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 986-6800 Dr. Yen Nguyen, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 208-3568 Dr. Yin Aye, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 986-6860 Dr. Yiukei Poon, D.O.Oakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1190 Dr. Yvonne Yeung, M.D.Oakland, CA · $737 in drug and device payments (2025) · Telehealth ·
(510) 465-3588 Dr. Zaina El-isa, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 535-4410 Dr. Jesse Chen, DOOak Park, CA · No drug or device payments recorded (2025) ·
(805) 974-0456 Dr. Duc Nguyen, M.D.Oceano, CA · No drug or device payments recorded (2025) ·
(805) 994-2100 Dr. Angela Shih, D.O.Oceanside, CA · No drug or device payments recorded (2025) ·
(760) 966-2499 Dr. Brett Chamberlin, M.D.Oceanside, CA · No drug or device payments recorded (2025) ·
(760) 725-1288 Dr. Catherine Lawson, M.D.Oceanside, CA · $82 in drug and device payments (2025) · Telehealth ·
(760) 941-4498 Dr. Christopher Davis, MDOceanside, CA · No drug or device payments recorded (2025) ·
(760) 725-7410 Dr. Claire Mccutcheon, MDOceanside, CA · No drug or device payments recorded (2025) ·
(760) 724-8411 Dr. David Antoun, MDOceanside, CA · $159 in drug and device payments (2025) ·
(760) 724-8411 Dr. Denise Gomez, M.DOceanside, CA · $317 in drug and device payments (2025) ·
(760) 757-4566 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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