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. George Greenwald, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 903-3000 Dr. Gretchen Rooker, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 903-3000 Dr. Hafsah IjazMountain View, CA · No drug or device payments recorded (2025) ·
(319) 569-9752 Dr. Harmanjot Gill, M.D.Mountain View, CA · $22 in drug and device payments (2025) ·
(650) 934-7800 Dr. Hong Gu, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 903-2716 Dr. James LewisMountain View, CA · No drug or device payments recorded (2025) ·
(408) 739-6000 Dr. Jane-yi Meng, M.D.Mountain View, CA · No drug or device payments recorded (2025) ·
(650) 962-4554 Dr. Jasneet Kullar, M.D.Mountain View, CA · $24 in drug and device payments (2025) ·
(888) 201-1937 Dr. Jean Lighthall, M.D.Mountain View, CA · No drug or device payments recorded (2025) ·
(650) 938-3593 Dr. Jean Wong, MDMountain View, CA · $189 in drug and device payments (2025) · Telehealth ·
(650) 934-7808 Dr. Jerry Manoukian, MDMountain View, CA · $375 in drug and device payments (2025) ·
(650) 940-1006 Dr. Jocelyn ChinMountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7808 Dr. Jonathan Squire, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 903-3000 Dr. Jonathan Tse, D.O.Mountain View, CA · No drug or device payments recorded (2025) ·
(925) 323-3154 Dr. Josephine Magnuson, M.D.Mountain View, CA · No drug or device payments recorded (2025) ·
(650) 428-1200 Dr. Josephine TangMountain View, CA · No drug or device payments recorded (2025) ·
(650) 934-7208 Dr. Joshua Shing, MDMountain View, CA · $122 in drug and device payments (2025) · Telehealth ·
(650) 934-7808 Dr. Kam-har Yung, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 934-7800 Dr. Kartik Shah, MDMountain View, CA · No drug or device payments recorded (2025) ·
(415) 658-6791 Dr. Karunasree Cherukuri, MDMountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 903-3000 Dr. Kavita Reddy, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 934-7000 Dr. Kenneth Peters, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 961-9430 Dr. Kenny Chen, M.D.Mountain View, CA · No drug or device payments recorded (2025) ·
(650) 988-8460 Dr. Kevin KyMountain View, CA · No drug or device payments recorded (2025) ·
(650) 988-3271 Dr. Kimberley Carlson, MDMountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7808 Dr. Kristin Welter, MDMountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7808 Dr. Kwan Pun, MDMountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7000 Dr. Laura Kinsel, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 965-3817 Dr. Lawrence Chin, M.D.Mountain View, CA · $974 in drug and device payments (2025) · Telehealth ·
(650) 934-7808 Dr. Lawrence Epstein, MDMountain View, CA · $1,207 in drug and device payments (2025) ·
(650) 625-0800 Dr. Lawrence Shapiro, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 934-7007 Dr. Lisa Wang, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 934-7808 Dr. Liteh Chang, MDMountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 903-3000 Dr. Lydia Wilga, MDMountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7808 Dr. Manisha Yadav, M.D.Mountain View, CA · No drug or device payments recorded (2025) ·
(650) 934-7808 Dr. Marc Calestini, M.D.Mountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7808 Dr. Mariam Manoukian, MDMountain View, CA · $595 in drug and device payments (2025) · Telehealth ·
(650) 940-1006 Dr. Marianne Ghobrial, M.D.Mountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7808 Dr. Marina Tostado, MDMountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7808 Dr. Marirose Calderon, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 740-9000 Dr. Mark Lewis, MDMountain View, CA · $24 in drug and device payments (2025) · Telehealth ·
(650) 967-8890 Dr. Martha DornMountain View, CA · No drug or device payments recorded (2025) ·
(650) 962-4360 Dr. Marvin Santos, M.D.Mountain View, CA · No drug or device payments recorded (2025) ·
(650) 603-8201 Dr. Matthew ChinMountain View, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 934-7808 Dr. Michael Podlone, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 934-7808 Dr. Michelle PezzaniMountain View, CA · No drug or device payments recorded (2025) ·
(650) 940-7000 Dr. Michelle Yen, MDMountain View, CA · No drug or device payments recorded (2025) ·
(650) 940-7000 Dr. Modern Weng, D.O.Mountain View, CA · $173 in drug and device payments (2025) ·
(650) 227-1102 Dr. Moriah Schwarz, DOMountain View, CA · No drug or device payments recorded (2025) ·
(650) 940-7000 Dr. Mrunal KulkarniMountain View, CA · No drug or device payments recorded (2025) ·
(650) 988-3271 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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