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. Linda Hsu, MDDowney, CA · $912 in drug and device payments (2025) · Telehealth ·
(562) 867-2796 Dr. Yvonne Battiste, RNEast Rancho Dominguez, CA · No drug or device payments recorded (2025) ·
(855) 659-2670 Dr. Ahmed El-ghoneimy, M.D.El Cajon, CA · No drug or device payments recorded (2025) ·
(619) 662-4100 Dr. Anthony Kingsley, MDEl Monte, CA · $140 in drug and device payments (2025) ·
(626) 448-0468 Dr. Khine Phyu, MDEl Monte, CA · No drug or device payments recorded (2025) ·
(626) 258-1600 Dr. Jennifer Kim, MDEncinitas, CA · No drug or device payments recorded (2025) ·
(619) 271-6300 Dr. David Stern, M.D.Encino, CA · No drug or device payments recorded (2025) ·
(818) 986-6009 Dr. Martin Schwartz, M.D.Escondido, CA · No drug or device payments recorded (2025) ·
(760) 520-8200 Dr. Celeste Sayles-croy, DOEureka, CA · No drug or device payments recorded (2025) ·
(707) 441-1624 Dr. Jennifer Heidmann, MDEureka, CA · No drug or device payments recorded (2025) ·
(707) 443-9747 Dr. Roxana Aminbakhsh, M.D.Folsom, CA · No drug or device payments recorded (2025) · Telehealth ·
(858) 900-6004 Dr. Kumari Jayawardena, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3041 Dr. Richard Wong, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 964-6229 Dr. Victor Siew, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 435-0600 Dr. Gary Lee, MDFremont, CA · No drug or device payments recorded (2025) ·
(408) 900-8838 Dr. Phyu Phyu Lim, MDFremont, CA · No drug or device payments recorded (2025) ·
(510) 249-2700 Dr. Samina Khwaja, M.D.Fremont, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 490-1222 Dr. Chelsea Gong, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 313-8110 Dr. Dzung Trinh, MDFresno, CA · $1,487 in drug and device payments (2025) · Telehealth ·
(559) 550-4344 Dr. Stephen Grossman, M.D.Fresno, CA · $130 in drug and device payments (2025) · Telehealth ·
(559) 499-1233 Dr. Sunitha Nalavenkata, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 228-5327 Dr. Than Aw, MDFresno, CA · $2,653 in drug and device payments (2025) ·
(559) 222-9362 Dr. Allen Chou, MDGarden Grove, CA · No drug or device payments recorded (2025) · Telehealth ·
(714) 534-2222 Dr. Chaewon Song, MDGarden Grove, CA · $2,099 in drug and device payments (2025) · Telehealth ·
(714) 530-3740 Dr. Giselle Seron, MDGarden Grove, CA · No drug or device payments recorded (2025) ·
(972) 226-8900 Dr. Mahmuda Alam, M.D.Glendale, CA · No drug or device payments recorded (2025) ·
(646) 244-2962 Dr. Stanley Ostern, M.D.Goleta, CA · No drug or device payments recorded (2025) ·
(805) 965-2832 Dr. Kuldip Gill, M.D.Grass Valley, CA · $572 in drug and device payments (2025) · Telehealth ·
(530) 273-8452 Dr. Mark Kubik, MDGreenbrae, CA · No drug or device payments recorded (2025) ·
(415) 464-1770 Dr. Maryam Ziaie Matin, MDGreenbrae, CA · $125 in drug and device payments (2025) ·
(415) 464-1771 Dr. Theresa Berta, MDGreenbrae, CA · No drug or device payments recorded (2025) ·
(415) 464-1771 Dr. Albert Bui, M.D.Hacienda Heights, CA · $1,122 in drug and device payments (2025) · Telehealth ·
(626) 964-2880 Dr. Maurice Turner, MDHarbor City, CA · No drug or device payments recorded (2025) ·
(424) 328-2400 Dr. Sarah Olelewe, M.D.Hawthorne, CA · No drug or device payments recorded (2025) ·
(310) 679-9293 Dr. Rachel Mayorga, MDHealdsburg, CA · $89 in drug and device payments (2025) ·
(707) 385-0222 Dr. John Homan, MDHuntington Beach, CA · $18 in drug and device payments (2025) ·
(949) 720-9266 Dr. Nancy Councelbaum, MDIrvine, CA · No drug or device payments recorded (2025) ·
(949) 753-7475 Dr. Wesley Woo, M.D.La Canada, CA · No drug or device payments recorded (2025) · Telehealth ·
(818) 468-4145 Dr. Patricia Gifford, MDLaguna Hills, CA · No drug or device payments recorded (2025) ·
(877) 351-7710 Dr. Robert Feldman, M.D.Laguna Hills, CA · $254,289 in drug and device payments (2025) ·
(949) 452-1930 Dr. Sarah Teymoorian, M.D.Laguna Hills, CA · $27 in drug and device payments (2025) · Telehealth ·
(949) 588-7262 Dr. Suhail Hawit, MDLaguna Hills, CA · No drug or device payments recorded (2025) ·
(949) 305-2660 Dr. Adil Abbasi, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 775-7314 Dr. Alexandra Green, MDLa Jolla, CA · $52 in drug and device payments (2025) ·
(858) 554-6158 Dr. Avnish Gill, M.D.La Jolla, CA · No drug or device payments recorded (2025) · Telehealth ·
(858) 554-6158 Dr. Brian Clifford, M.D.La Jolla, CA · $25 in drug and device payments (2025) ·
(858) 554-3200 Dr. Carlos Preciado-ruiz, MDLa Jolla, CA · $66 in drug and device payments (2025) ·
(858) 554-3200 Dr. Christopher YukiLa Jolla, CA · $184 in drug and device payments (2025) ·
(858) 554-3200 Dr. Daniel Given, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 554-9100 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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