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. Patrick Twomey, M.D.South San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 225-2580 Dr. Prasanna Durairaj, D.OSouth San Francisco, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 742-2100 Dr. Priti Dahya, M.D.South San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Robert Marshall, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Sadhana Sonti, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Sally Yu, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Shandra Yoshimi, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Simrat Randhawa, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Stephen Howe, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Timothy Liao, MDSouth San Francisco, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 742-2000 Dr. Timothy Puri, M.D.South San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 826-2945 Dr. Tom Vo, MDSouth San Francisco, CA · $169 in drug and device payments (2025) ·
(650) 742-2000 Dr. Wendy Tseng, M.D., M.S.South San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. William Chung, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Wing Ken Wong, DOSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Yumi Taylor, MDSouth San Francisco, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 777-4400 Dr. Zara Butte, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(844) 838-3322 Dr. Denise Parnell, M.D.Spring Valley, CA · No drug or device payments recorded (2025) ·
(619) 515-2300 Dr. Aabed Meer, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Aaliya Yaqub, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Abraham Verghese, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Adam Elkin, MDStanford, CA · $43 in drug and device payments (2025) ·
(650) 723-6661 Dr. Agiua Heath, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Agustina Saenz, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Akanksha ThakurStanford, CA · No drug or device payments recorded (2025) ·
(650) 498-4560 Dr. Akarsh Sharma, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Akemi Brown, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Albert Park, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Alexander Conway, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Alexander Macbriar, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Alexander Song, MDStanford, CA · $26 in drug and device payments (2025) ·
(650) 723-4000 Dr. Alexey Aleshin, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Alistair Aaronson, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Allison Pei, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Amit Kaushal, M.D., PH.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Amna Rasheed, DOStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Amrapali Maitra, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Ana Skomal, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Anastasia Toles, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 498-7103 Dr. Andrea Smeraglio, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Andre Kumar, MDStanford, CA · $491 in drug and device payments (2025) ·
(650) 723-4000 Dr. Andrew Chin, DOStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Andrew Dunatchik, M.D., PHARM.D.Stanford, CA · $137 in drug and device payments (2025) ·
(650) 723-4000 Dr. Andrew Perlman, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 270-6831 Dr. Angela Primbas, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Ann Chuang, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Anthony Silva, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Anuradha Madhavan, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Anuradha Phadke, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. April Liang, MDStanford, 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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