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.
Where Geriatric Medicine Doctors (Internal Medicine) in California practice
From CMS Medicare enrollment records covering 266 of the 534 providers listed here (50%). Providers who do not bill Medicare are not included in these figures.
30%solo or small practice (under 10 clinicians)
12%mid-size group (10 to 99)
58%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Geriatric Medicine Doctors (Internal Medicine) | All clinicians in group | Main city |
| The Regents of the University of California | 24 | 1,426 | Santa Monica |
| Scripps Health | 15 | 1,450 | La Jolla |
| Permanente Medical Group Inc. | 13 | 10,928 | Santa Clara |
| Regents of the University of California | 12 | 706 | San Francisco |
| Sutter Bay Medical Foundation | 11 | 3,783 | Los Altos |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Geriatric Medicine Doctors (Internal Medicine) affiliated |
| Ronald Reagan UCLA Medical Center | Los Angeles | Government | 4 of 5 | 27 |
| Santa Monica - UCLA Med Ctr & Orthopaedic Hospital | Santa Monica | Nonprofit | 5 of 5 | 21 |
| UCSF Medical Center | San Francisco | Nonprofit | 4 of 5 | 16 |
| UC San Diego Health Hillcrest - Hillcrest Med Ctr | San Diego | Nonprofit | 5 of 5 | 13 |
| Cedars-Sinai Medical Center | Los Angeles | Nonprofit | 5 of 5 | 11 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
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. Roya Fathi, M.D.Agoura Hills, CA · No drug or device payments recorded (2025) ·
(312) 351-0420 Dr. Judy Bertelsen, M.D.Alameda, CA · No drug or device payments recorded (2025) ·
(510) 486-1467 Dr. Victor Lee, M.D.Alhambra, CA · No drug or device payments recorded (2025) ·
(855) 586-7336 Dr. Radha Menon, M.D.Apple Valley, CA · $235 in drug and device payments (2025) · Telehealth ·
(760) 242-3040 Dr. Wahid Midou, M.D.Apple Valley, CA · No drug or device payments recorded (2025) ·
(760) 240-5044 Dr. Wayne Flicker, M.D.Arcadia, CA · No drug or device payments recorded (2025) ·
(626) 462-1884 Dr. Tzong-yueh Hwang, M.D.Artesia, CA · No drug or device payments recorded (2025) ·
(562) 809-0288 Dr. Murray Batt, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 888-4500 Dr. Andreas Ahlas, M.D.Bakersfield, CA · $226 in drug and device payments (2025) ·
(559) 457-5200 Dr. Bharath Raghukultilak, M.D.Bakersfield, CA · No drug or device payments recorded (2025) ·
(661) 635-3050 Dr. Mabrook Shehata, MDBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 327-8000 Dr. Mohan Mallam, M.D.Barstow, CA · No drug or device payments recorded (2025) ·
(760) 256-4601 Dr. Michael Wang, M.D.Bell, CA · No drug or device payments recorded (2025) · Telehealth ·
(562) 444-5450 Dr. Dat Vo, MDBellflower, CA · No drug or device payments recorded (2025) ·
(562) 461-3000 Dr. Bruce Silver, MDBerkeley, CA · No drug or device payments recorded (2025) ·
(510) 525-8980 Dr. Claudia Landau, PH.D.,M.D.Berkeley, CA · No drug or device payments recorded (2025) ·
(510) 541-9024 Dr. Dawn Groten, MDBerkeley, CA · No drug or device payments recorded (2025) ·
(510) 525-8980 Dr. Joan King-angell, MDBerkeley, CA · No drug or device payments recorded (2025) ·
(510) 274-8996 Dr. Michael Genualdi, M.D.Berkeley, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 929-1400 Dr. Michael Goldrich, M.D.Berkeley, CA · No drug or device payments recorded (2025) ·
(510) 981-4100 Dr. Maria Thies, D.O.Bermuda Dunes, CA · $16 in drug and device payments (2025) ·
(760) 360-3193 Dr. Elizabeth Whiteman, MDBeverly Hills, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 385-3511 Dr. Geetha Rao, MDBeverly Hills, CA · $175 in drug and device payments (2025) · Telehealth ·
(310) 248-7000 Dr. Sonja Rosen, MDBeverly Hills, CA · No drug or device payments recorded (2025) · Telehealth ·
(310) 385-3511 Dr. Marielle Bolano, MDBrisbane, CA · No drug or device payments recorded (2025) · Telehealth ·
(415) 514-3577 Dr. Robert Zimbroff, MDBrisbane, CA · No drug or device payments recorded (2025) · Telehealth ·
(415) 514-3577 Dr. Nilesh Desai, M.D.Burbank, CA · $1,095 in drug and device payments (2025) · Telehealth ·
(818) 848-5561 Dr. Tallin PattersonBurbank, CA · $2,739 in drug and device payments (2025) · Telehealth ·
(626) 708-0496 Dr. Amy Hsu, MDBurlingame, CA · $145 in drug and device payments (2025) · Telehealth ·
(650) 652-8277 Dr. Elizabeth Landsverk, M.D.Burlingame, CA · No drug or device payments recorded (2025) ·
(650) 357-8834 Dr. Lily Chu, MDBurlingame, CA · No drug or device payments recorded (2025) ·
(650) 347-3004 Dr. Edgardo Falcon, M.D.Camarillo, CA · No drug or device payments recorded (2025) ·
(805) 278-7888 Dr. Anil Date, M.D.Canyon Country, CA · $65 in drug and device payments (2025) ·
(818) 220-5209 Dr. Anush Hasratyan, M.D.Canyon Country, CA · No drug or device payments recorded (2025) · Telehealth ·
(661) 250-5230 Dr. Isabel Pereira, MDCarlsbad, CA · No drug or device payments recorded (2025) ·
(760) 720-9898 Dr. Stephen Poses, M.D.Carlsbad, CA · No drug or device payments recorded (2025) ·
(760) 230-6043 Dr. Carl Haller, MDCarmichael, CA · No drug or device payments recorded (2025) ·
(916) 483-3437 Dr. Caroline PetrossianCentury City, CA · No drug or device payments recorded (2025) ·
(818) 568-4110 Dr. Sartaj Sandhu, M.D.Chico, CA · $470 in drug and device payments (2025) · Telehealth ·
(530) 342-4395 Dr. Josue Reynaga, MDChula Vista, CA · No drug or device payments recorded (2025) ·
(619) 691-7587 Dr. Mushrik Kaisey, MDChula Vista, CA · $128 in drug and device payments (2025) · Telehealth ·
(619) 426-9731 Dr. Robert Moon, M.D.Chula Vista, CA · $25 in drug and device payments (2025) ·
(619) 800-6713 Dr. Thet Oo, MDColton, CA · No drug or device payments recorded (2025) ·
(909) 580-1675 Dr. Daniel Cremin, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 646-5320 Dr. Alice Lively Hamill, DOCupertino, CA · No drug or device payments recorded (2025) ·
(408) 366-4322 Dr. Bindu Chopra, M.D.Cupertino, CA · No drug or device payments recorded (2025) ·
(408) 366-4169 Dr. Michael Palchak, M.D.Davis, CA · No drug or device payments recorded (2025) ·
(530) 979-7775 Dr. Glenn Kissinger, MDDinuba, CA · No drug or device payments recorded (2025) ·
(559) 591-1820 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.
Related reading on HealthcareDiscovery.AI
Geriatric Medicine (Internal Medicine) in all 50 states Search all 534 in the directory Ask Zach for help choosing
Related
