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. David Stanford, MDSun City, CA · $494 in drug and device payments (2025) · Telehealth ·
(951) 301-7611 Dr. Duane Darnell, DOSun City, CA · No drug or device payments recorded (2025) ·
(951) 246-1366 Dr. Edivina Gonzales, M.D.Sun City, CA · $461 in drug and device payments (2025) ·
(951) 301-3588 Dr. Evelyn Tetteh-martey, MDSun City, CA · No drug or device payments recorded (2025) ·
(951) 679-7022 Dr. Irene Ching, DOSun City, CA · $583 in drug and device payments (2025) · Telehealth ·
(951) 723-3804 Dr. James Krieg, M.D.Sun City, CA · No drug or device payments recorded (2025) ·
(951) 672-1911 Dr. Linda Evans, MDSun City, CA · $69 in drug and device payments (2025) ·
(951) 672-3332 Dr. Patrick Gonzales, M.D.Sun City, CA · $942 in drug and device payments (2025) ·
(951) 301-3588 Dr. Richard Lam, MDSun City, CA · $2,607 in drug and device payments (2025) · Telehealth ·
(951) 679-6467 Dr. Stephen Nguyen, MDSun City, CA · $317 in drug and device payments (2025) · Telehealth ·
(951) 672-4900 Dr. Thang Nguyen, MDSun City, CA · $629 in drug and device payments (2025) · Telehealth ·
(951) 679-2358 Dr. Celerino Brucal, M.D.Sunland, CA · No drug or device payments recorded (2025) ·
(818) 353-1533 Dr. Kevork Vorperian, M.D.Sunland, CA · $529 in drug and device payments (2025) ·
(818) 962-0715 Dr. Aisha AminSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(718) 334-2488 Dr. Alexander Wong, MDSunnyvale, CA · $63 in drug and device payments (2025) · Telehealth ·
(408) 730-4360 Dr. Andrew Lin, MDSunnyvale, CA · $2,840 in drug and device payments (2025) · Telehealth ·
(408) 739-5950 Dr. Andrew Prodromou, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4360 Dr. Anitha Gundupalli, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 366-0595 Dr. Anne Cole, M.D.Sunnyvale, CA · No drug or device payments recorded (2025) ·
(650) 969-2959 Dr. Aparna Batlapenumarthy, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4360 Dr. Chung-wei Chan, M.D.Sunnyvale, CA · No drug or device payments recorded (2025) ·
(650) 227-1150 Dr. Chung-ying Chen, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4262 Dr. David Feinstein, MDSunnyvale, CA · No drug or device payments recorded (2025) ·
(805) 602-0386 Dr. Douglas Tucker, MDSunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 739-6000 Dr. Euna Kim, DOSunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 730-4251 Dr. Grace Guo, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4360 Dr. Holland St. JohnSunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 739-6000 Dr. James Larrick, MD PHDSunnyvale, CA · No drug or device payments recorded (2025) ·
(415) 263-6311 Dr. Jason Hwang, M.D.Sunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 940-6001 Dr. Jason Melehani, MD, PHDSunnyvale, CA · No drug or device payments recorded (2025) ·
(916) 834-7612 Dr. Julie Nguyen, MDSunnyvale, CA · $125 in drug and device payments (2025) · Telehealth ·
(408) 730-4256 Dr. Kimberly Kanada, M.D.Sunnyvale, CA · $430 in drug and device payments (2025) · Telehealth ·
(650) 934-7676 Dr. Kurt Vandevort, MDSunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 730-4360 Dr. Leland Wong, DOSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4262 Dr. Leon Cheng, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4262 Dr. Longhang Nguyen, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(888) 663-6331 Dr. Marvin Miranda, M.D., M.P.H.Sunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4360 Dr. Mary Morcos, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4360 Dr. Matthew Lippner, MDSunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 730-4360 Dr. Mehran Jamali, M.DSunnyvale, CA · No drug or device payments recorded (2025) ·
(650) 283-0611 Dr. Michael Su, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4360 Dr. Minal Moharir, M.D.Sunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 773-9000 Dr. Nikita FernandesSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4270 Dr. Nora Woiwode, MDSunnyvale, CA · No drug or device payments recorded (2025) ·
(650) 730-4360 Dr. Patti Allen, M.D.Sunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 730-4360 Dr. Peter Fay, MDSunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 992-4858 Dr. Priya Bhusri, M.D.Sunnyvale, CA · $35 in drug and device payments (2025) · Telehealth ·
(408) 730-4360 Dr. Quanjing Liu, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-4360 Dr. Renuka Perla, M.DSunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 992-4858 Dr. Robina Moen, M.D.Sunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 730-4360 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.
Related reading on HealthcareDiscovery.AI
Internal Medicine in all 50 states Search all 17,715 in the directory Ask Zach for help choosing
Related
