Geriatric Medicine Doctors (Internal Medicine) in California
Data updated monthly · Last refresh October 2026
534 Geriatric Medicine (Internal Medicine) providers practice in California, including 144 (27%) 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.
534providers
144telehealth
Los Angelestop city
Geriatric Medicine (Internal Medicine) by city in California
Choose a city to see providers there.
Geriatric Medicine (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. Michael Omlid, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7443 Dr. Marci Teresi, MDSanta Clara, CA · No drug or device payments recorded (2025) ·
(408) 851-1000 Dr. Mark Shimazaki, DOSanta Clara, CA · No drug or device payments recorded (2025) ·
(408) 851-1000 Dr. Myo Aung, MDSanta Clara, CA · No drug or device payments recorded (2025) ·
(408) 851-1000 Dr. Kathleen Kehmna, NPSanta Cruz, CA · No drug or device payments recorded (2025) ·
(831) 419-3685 Dr. Lawrence Rosenbaum, M.D.Santa Cruz, CA · No drug or device payments recorded (2025) ·
(831) 475-1111 Dr. Robert Keet, M.D.Santa Cruz, CA · No drug or device payments recorded (2025) ·
(831) 475-1111 Dr. Michael Kazak, MDSanta Maria, CA · $103 in drug and device payments (2025) ·
(805) 922-8269 Dr. David Reuben, M.D.Santa Monica, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 319-4371 Dr. Edward Hui, MDSanta Monica, CA · $19 in drug and device payments (2025) · Telehealth ·
(310) 319-4366 Dr. Kenneth Waltzer, M.D.Santa Monica, CA · No drug or device payments recorded (2025) ·
(424) 228-2421 Dr. Matthew Quan, MDSanta Monica, CA · No drug or device payments recorded (2025) ·
(310) 319-4371 Dr. Charlotte Carlson, M.D.Santa Rosa, CA · $24 in drug and device payments (2025) · Telehealth ·
(707) 308-2815 Dr. David Greene, MDSanta Rosa, CA · $22 in drug and device payments (2025) ·
(707) 579-6957 Dr. Kateri Murray, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 568-1094 Dr. Seema Rao, MD.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 546-2180 Dr. Stephen Chavin, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 539-6625 Dr. Waseem Ahmed, MDSanta Rosa, CA · No drug or device payments recorded (2025) ·
(707) 569-2300 Dr. Wynnelena Canio, M.D.Santa Rosa, CA · No drug or device payments recorded (2025) ·
(707) 393-3274 Dr. Frances Philley, MDSantee, CA · No drug or device payments recorded (2025) ·
(619) 956-2853 Dr. Chitra Fernando, M.D.San Ysidro, CA · No drug or device payments recorded (2025) ·
(619) 662-4100 Dr. Ellen Dayon, MDSeal Beach, CA · $19 in drug and device payments (2025) · Telehealth ·
(562) 493-9581 Dr. Mary Sherman, MDSeal Beach, CA · No drug or device payments recorded (2025) ·
(562) 493-9581 Dr. Prakash Narain, MDSeal Beach, CA · No drug or device payments recorded (2025) ·
(562) 493-9581 Dr. Nancy Weintraub, M.D.Sepulveda, CA · No drug or device payments recorded (2025) ·
(818) 895-9311 Dr. Samuel Murray, M.D.Sepulveda, CA · No drug or device payments recorded (2025) ·
(818) 895-9311 Dr. Dan Osterweil, MD, FACP,CMDSherman Oaks, CA · No drug or device payments recorded (2025) ·
(818) 986-7908 Dr. Salila Sharma, MDSherman Oaks, CA · No drug or device payments recorded (2025) ·
(818) 906-9805 Dr. Lucia Dattoma, MDSimi Valley, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 583-7640 Dr. Maung Tin, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(646) 920-7685 Dr. Qingping Wang, M.D., PH.D.South San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 502-3388 Dr. Silbey Mui, MDSouth San Francisco, CA · No drug or device payments recorded (2025) ·
(650) 742-2000 Dr. Anne Wakamiya, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 725-5591 Dr. Julianna Marwell, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Meera Sheffrin, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Ria Paul, M. D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Sarah Samandary, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Vanya Jain, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Vittavat Termglinchan, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Ashok Daftary, MDStockton, CA · No drug or device payments recorded (2025) ·
(209) 955-7700 Dr. Htun Oo, MDStockton, CA · No drug or device payments recorded (2025) ·
(209) 476-3569 Dr. Myo Zaw, MDStockton, CA · No drug or device payments recorded (2025) ·
(209) 557-6788 Dr. Vivek Singh, MDStockton, CA · $200 in drug and device payments (2025) ·
(209) 645-4005 Dr. Haini Liao, M.D.Sunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7000 Dr. Jessica Phan, MDSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-6250 Dr. Megha Pokhriyal, DOSunnyvale, CA · $20 in drug and device payments (2025) · Telehealth ·
(408) 530-6900 Dr. Pooja MathewSunnyvale, CA · No drug or device payments recorded (2025) · Telehealth ·
(408) 730-6250 Dr. Sangeeta Kopardekar, MDSunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 730-2800 Dr. Woody ChangSunnyvale, CA · No drug or device payments recorded (2025) ·
(408) 730-6250 Dr. Jonathan Lyu, DOSylmar, CA · No drug or device payments recorded (2025) ·
(747) 210-3205 Common questions
How many Geriatric Medicine (Internal Medicine) providers are in California?There are 534 Geriatric Medicine (Internal Medicine) providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Geriatric Medicine (Internal Medicine) providers in California offer telehealth?Yes. 144 of the 534 Geriatric Medicine (Internal Medicine) providers in California (about 27%) report offering telehealth services in CMS data.
Which cities in California have the most Geriatric Medicine (Internal Medicine) providers?Los Angeles (77), San Francisco (58), San Diego (38) have the highest concentration of Geriatric Medicine (Internal Medicine) providers in California.
How many Geriatric Medicine (Internal Medicine) providers in California received drug or device company payments?129 of 534 Geriatric Medicine (Internal Medicine) providers in California (24%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
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 Geriatric Medicine Doctors (Internal Medicine) in California work in independent practices or large health systems?Among 266 Geriatric Medicine Doctors (Internal Medicine) in California enrolled in Medicare, 30% bill through a solo or small practice with fewer than 10 clinicians, 12% through a mid-size group of 10 to 99, and 58% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Geriatric Medicine Doctors (Internal Medicine) in California work at?According to CMS facility affiliation records, the California hospitals where the most Geriatric Medicine Doctors (Internal Medicine) hold privileges are Ronald Reagan UCLA Medical Center in Los Angeles; Santa Monica - UCLA Med Ctr & Orthopaedic Hospital in Santa Monica; UCSF Medical Center in San Francisco.
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