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. Janine Yang, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jason Chang, MBBSStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jason Hom, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jason Warren, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jaspreet Dhillon, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jaspreet Pannu, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jeffrey Chi, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jeffrey Ketchersid, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jennifer Bollyky, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Jennifer Kim, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Jennifer SchymickStanford, CA · No drug or device payments recorded (2025) ·
(647) 993-9495 Dr. Jerry HsuStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-7621 Dr. Jerry Liu, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jessica Tran, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jessie Markovits, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Jesus Ramirez, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jingkun Yang, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Jo-anne Suffoletto, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Jocelyn Hull, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. John Kugler, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. John Rose, MDStanford, CA · No drug or device payments recorded (2025) ·
(214) 590-8000 Dr. John Wuchenich, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Jonathan Chen, MD, PHDStanford, CA · $142 in drug and device payments (2025) ·
(650) 725-3655 Dr. Jonathan Duong, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jonathan Hanisch, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Jonathan Volk, MDStanford, CA · No drug or device payments recorded (2025) ·
(415) 730-2764 Dr. Jong Hyon Lee, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Joshua Liu, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Julia Caton, M.D.Stanford, CA · $27 in drug and device payments (2025) ·
(650) 723-8287 Dr. Julie Ding, DOStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Julie Lee, MD, MPHStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Julieta Gabiola, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Justin Wong, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Kailyn Kim, MDStanford, CA · $1,571 in drug and device payments (2025) ·
(650) 723-4000 Dr. Kalin Wilson, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Kameron Black, DOStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Karishma Patel, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Kate Luenprakansit, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Kathan Vollrath, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Katharine Goodspeed, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Katherine Ward, MDStanford, CA · $177 in drug and device payments (2025) · Telehealth ·
(650) 723-4000 Dr. Kathleen Kenny, MDStanford, CA · $644 in drug and device payments (2025) · Telehealth ·
(650) 723-4000 Dr. Kavita Palapati, M.D.Stanford, CA · $91 in drug and device payments (2025) ·
(650) 723-4000 Dr. Kavitha Subramanian, MDStanford, CA · $21 in drug and device payments (2025) ·
(650) 723-4000 Dr. Kelley Skeff, MDStanford, CA · $125 in drug and device payments (2025) ·
(650) 723-5334 Dr. Kendell Cannon, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Keval Desai, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Kevin Chang, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 725-4000 Dr. Kevin Grimes, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Kevin Keet, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 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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