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. Natalie Curtis, MDOakland, CA · $125 in drug and device payments (2025) ·
(510) 437-4974 Dr. Nathan Juergens, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(651) 398-0897 Dr. Naveen Thota, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 869-6886 Dr. Neal Lischner, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Neha Gupta, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-5039 Dr. Neil Koris, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Nicholas Nelson, MBBSOakland, CA · $133 in drug and device payments (2025) ·
(510) 437-8383 Dr. Nicola Longmuir, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 251-3967 Dr. Nikitaa Nath, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1190 Dr. Nirav Bhakta, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. Noel Serrano, M.D.Oakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(707) 535-9279 Dr. Norman Quan, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Olivia KellyOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Osama El-sayed, MD, PHDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Padma Srinivasan, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 563-4300 Dr. Palak Kumar, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4141 Dr. Palav Babaria, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4974 Dr. Pandora Lee, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 271-4000 Dr. Pansy Kwong, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Parto Karimi, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 482-4009 Dr. Patricia Conolly, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 987-1000 Dr. Patricia Foo, MD, PHDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Paul Cheung, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 655-4000 Dr. Perneet Powar, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Perry Fumuso, MBA, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Peter Le, MDOakland, CA · $2,655 in drug and device payments (2025) ·
(510) 752-1000 Dr. Philip Madvig, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 987-1000 Dr. Priscilla Flores, DOOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Queziah Greenidge, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1190 Dr. Rachel Callaghan, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 869-8712 Dr. Rachel Canning, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Radha RameshOakland, CA · $352 in drug and device payments (2025) · Telehealth ·
(510) 437-5039 Dr. Rajiv Bhatia, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 777-1177 Dr. Rama Salvekar, MDOakland, CA · $100 in drug and device payments (2025) ·
(510) 752-1000 Dr. Ramona Tascoe, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 763-2223 Dr. Raymond Davis, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. Raymond Yu, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Reena Concepcion, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-7867 Dr. Reenee Nandi, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Richard Levine, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 914-1047 Dr. Rita Ng, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Robert Debare, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Robert Hagar, M.D.Oakland, CA · $12,848 in drug and device payments (2025) · Telehealth ·
(510) 428-3885 Dr. Robert Tang, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 567-5800 Dr. Ronald Chun, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 267-7800 Dr. Ronald Yuen, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Roopal Desai, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Rosa Valadao, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 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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