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. Steven Witlin, M.D.Culver City, CA · No drug or device payments recorded (2025) ·
(310) 845-9311 Dr. Thais Salles Araujo, MDCulver City, CA · No drug or device payments recorded (2025) ·
(310) 202-7693 Dr. Christine Gebert-parikh, MDCupertino, CA · No drug or device payments recorded (2025) ·
(408) 783-4000 Dr. Gabriel Young, M.D.Cupertino, CA · $375 in drug and device payments (2025) · Telehealth ·
(408) 366-0600 Dr. Hakima Schulz, M.D.Cupertino, CA · $24 in drug and device payments (2025) ·
(408) 357-9214 Dr. Howard Rice, MDCupertino, CA · $88 in drug and device payments (2025) · Telehealth ·
(650) 210-8000 Dr. Jaishri Ramesh, M.D.Cupertino, CA · No drug or device payments recorded (2025) ·
(408) 996-8656 Dr. Justin LowCupertino, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 666-2569 Dr. Lakshmi Mahendran, M.D.Cupertino, CA · No drug or device payments recorded (2025) ·
(954) 384-0435 Dr. Martin Yee, MDCupertino, CA · No drug or device payments recorded (2025) ·
(408) 217-6130 Dr. Monique Kuo, MDCupertino, CA · No drug or device payments recorded (2025) ·
(408) 366-4322 Dr. Suja Georgie, M.DCupertino, CA · No drug or device payments recorded (2025) ·
(408) 216-0297 Dr. Thomas Hsu, MDCupertino, CA · $116 in drug and device payments (2025) ·
(408) 446-5353 Dr. Yuehua Li, MDCupertino, CA · $147 in drug and device payments (2025) ·
(408) 529-8298 Dr. Edwin Sakamoto, M.D.Cypress, CA · No drug or device payments recorded (2025) ·
(714) 226-3762 Dr. Hani Benyamin-ajaipiCypress, CA · No drug or device payments recorded (2025) ·
(347) 277-6268 Dr. Michael Philipps, M.D.Cypress, CA · No drug or device payments recorded (2025) ·
(714) 226-6532 Dr. William O'bryant, M.D.Cypress, CA · No drug or device payments recorded (2025) ·
(714) 226-6884 Dr. Alexander Levy, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Alice Yan, M.D.Daly City, CA · $2,363 in drug and device payments (2025) · Telehealth ·
(650) 991-4466 Dr. Alla Rudin, MDDaly City, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 742-2000 Dr. Andrea Escala Perez-reyes, MDDaly City, CA · No drug or device payments recorded (2025) ·
(415) 391-9686 Dr. Ann Omachi, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 994-2300 Dr. Anupam Aditi, M.D.Daly City, CA · $947 in drug and device payments (2025) ·
(650) 756-5000 Dr. Anuradha Reddy, M.D.Daly City, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 301-5860 Dr. Bella Berzin, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Carlo Magtibay, MDDaly City, CA · No drug or device payments recorded (2025) ·
(415) 680-4135 Dr. Clara Sue, M.DDaly City, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 301-5860 Dr. Constance Wong, MDDaly City, CA · No drug or device payments recorded (2025) ·
(415) 680-4135 Dr. Damon Lee, MDDaly City, CA · $1,815 in drug and device payments (2025) · Telehealth ·
(650) 756-0110 Dr. Daniel Hwang, M.D.Daly City, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 652-8500 Dr. Elizabeth Turner, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Eva Mikrut, MDDaly City, CA · No drug or device payments recorded (2025) ·
(415) 680-4135 Dr. Fan Xie, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Grace HuangDaly City, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 652-8500 Dr. Helen Sun, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 550-3923 Dr. Herminigildo Valle, MDDaly City, CA · $2,535 in drug and device payments (2025) ·
(650) 991-7002 Dr. Hui Yang, MDDaly City, CA · $128 in drug and device payments (2025) ·
(415) 680-4135 Dr. Jesse Dion, M.D.Daly City, CA · No drug or device payments recorded (2025) ·
(650) 992-4000 Dr. Jesus Roland Gatpolintan, M.D.Daly City, CA · $1,025 in drug and device payments (2025) · Telehealth ·
(650) 652-8500 Dr. Jie Ni, MDDaly City, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 742-2000 Dr. Joanie Loh, MDDaly City, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 742-2000 Dr. Joe Wong, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. John Lai, M.D.Daly City, CA · $4,581 in drug and device payments (2025) · Telehealth ·
(650) 991-4463 Dr. Juanito Austria, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Karl Lee, M.D.Daly City, CA · No drug or device payments recorded (2025) ·
(650) 994-2377 Dr. Keith Lasko, MDDaly City, CA · No drug or device payments recorded (2025) ·
(650) 992-4000 Dr. Kenneth Chuang, M.D.Daly City, CA · No drug or device payments recorded (2025) ·
(650) 301-5848 Dr. Kevin Wong, M.D.Daly City, CA · $4,500 in drug and device payments (2025) · Telehealth ·
(650) 991-4466 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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