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. Gayathri Kumar, MDOakland, CA · No drug or device payments recorded (2025) ·
(216) 526-2916 Dr. Geetha Tamaroon, D.O.Oakland, CA · $243 in drug and device payments (2025) ·
(510) 437-4800 Dr. Ghita Bouzarif, MDOakland, CA · $201 in drug and device payments (2025) ·
(510) 437-5039 Dr. Gina Wang, MDOakland, CA · $587 in drug and device payments (2025) · Telehealth ·
(510) 465-3588 Dr. Gita Moarefi, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(888) 663-6331 Dr. Glenda NewellOakland, CA · No drug or device payments recorded (2025) ·
(510) 613-8089 Dr. Gretchen Mello, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Gurpreet Kaur, D.O.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Hamta Jafari, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Hansel Lim, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Harold Orr, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 453-6392 Dr. Harry Fung, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Hasmik Arzumanyan, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Helen Driscoll, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4323 Dr. Hena Borneo, DOOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Hiroshi Terashima, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 452-4824 Dr. Hoi Ying Lau, DOOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Howard Chang, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Hugh Benedict, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jacqueline Kiang, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. Jacques Hirschler, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 339-3463 Dr. Jamal Rana, MDOakland, CA · $3,779 in drug and device payments (2025) ·
(510) 752-1000 Dr. James PasaloOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Janani Sridharan, DOOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Janet Lai, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. Janice Azebu, DOOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jason Burge, DOOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jeanette Yu, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jeanne Reisman, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jean Rhow, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jeffrey Burack, M.D.Oakland, CA · $632 in drug and device payments (2025) ·
(510) 869-8400 Dr. Jeffrey Wang, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jenna ChenOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-5039 Dr. Jennifer Arnold, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jennifer Hughes, M.DOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Jennifer Stanley, MDOakland, CA · No drug or device payments recorded (2025) ·
(866) 632-6627 Dr. Jenny Cohen, M.D., M.P.H.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-5039 Dr. Jenny Parma, D.O.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-8400 Dr. Jeremy Swartzberg, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Jessica Wang, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 567-5700 Dr. Jianing Yang, DOOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Jing-fun Wu, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. Jin Packard, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 535-7618 Dr. Joan Lo, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 987-1000 Dr. Joanne Vu, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 752-7867 Dr. John Christensen, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 563-4300 Dr. John Flaningam, MDOakland, CA · No drug or device payments recorded (2025) ·
(916) 844-5145 Dr. John Hirshleifer, M.DOakland, CA · No drug or device payments recorded (2025) ·
(510) 662-5894 Dr. John Hsu, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 987-1000 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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