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. Richard Weinstein, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 952-2888 Dr. Robert Hardy, M.D.Walnut Creek, CA · $1,548 in drug and device payments (2025) · Telehealth ·
(925) 378-4040 Dr. Robert Noriega, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(415) 284-9400 Dr. Robert Sosa, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Ronald Yang, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Ross Pirkle, M.D.Walnut Creek, CA · $1,602 in drug and device payments (2025) · Telehealth ·
(925) 378-4040 Dr. Roxanne Mcdaniel, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Rujuta Manghani, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9000 Dr. Runjhun Misra, D.O.Walnut Creek, CA · $72 in drug and device payments (2025) · Telehealth ·
(925) 947-3312 Dr. Russell Everest, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Samuel Tseng, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Sangeeta Baronia, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Sarah Rahman, M.D.Walnut Creek, CA · $156 in drug and device payments (2025) ·
(925) 296-9720 Dr. Sara Qasim Bughio, M.DWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Scott Morehouse, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Sergei Schegolev, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9000 Dr. Shagun Bindlish, MDWalnut Creek, CA · $185 in drug and device payments (2025) · Telehealth ·
(925) 230-2386 Dr. Sheila Bhatia, MDWalnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 295-4070 Dr. Shiv Sudhakar, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9000 Dr. Shoshana Ungerleider, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Smita Chandra, M.D.Walnut Creek, CA · $21 in drug and device payments (2025) ·
(925) 947-3393 Dr. Sohrab Amiri, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Sonika Shah, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Stefanie Altmann, DOWalnut Creek, CA · $957 in drug and device payments (2025) ·
(925) 932-3800 Dr. Stephanie Phalip, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 230-2386 Dr. Sudharshan Parthasarathy, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3312 Dr. Sukhjinder Brah, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 947-3393 Dr. Suneeti Sapru, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Susan Chuang, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Susan Rapp, MDWalnut Creek, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 906-2040 Dr. Suzanne Chang, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Syed Mustafa, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 938-8082 Dr. Sylvia Connolly, MDWalnut Creek, CA · $28 in drug and device payments (2025) ·
(925) 295-4000 Dr. Tarannum Guller, MDWalnut Creek, CA · $110 in drug and device payments (2025) · Telehealth ·
(925) 932-6330 Dr. Teodora Dumitrescu, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3312 Dr. Thomas Connolly, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 906-2000 Dr. Thomas Miller, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9000 Dr. Tiffany King, D.O.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Tony Zung, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Tricia Yeap, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9740 Dr. Uyen-chi Huynh, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3312 Dr. Veronika Simanek, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 937-9984 Dr. Viktoriya Sharp, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Viviane Alfandary, M.D.Walnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3393 Dr. Waheeda Hiller, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 296-9228 Dr. Winslow Wong, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Yevgeny Klebanov, M.D.Walnut Creek, CA · $113 in drug and device payments (2025) ·
(925) 296-0344 Dr. Yong Zhang, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 295-4000 Dr. Zahid Shaikh, M.D.Walnut Creek, CA · $28 in drug and device payments (2025) ·
(925) 947-3393 Dr. Zainab Mezban, MDWalnut Creek, CA · No drug or device payments recorded (2025) ·
(925) 947-3312 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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