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. Lilavati IndulkarOakland, CA · No drug or device payments recorded (2025) ·
(510) 579-7983 Dr. Lindsay Mazotti, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Ling XuOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 437-4800 Dr. Lisha Wilson, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 268-1800 Dr. Lloyd Stockey, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Loveleena Virk, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Lyn Berry, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4323 Dr. Malcolm Moyer, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1190 Dr. Mamatha Hiregoudar, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(805) 300-2340 Dr. Marcia Redwood, M.D.Oakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 633-7315 Dr. Marci Gottlieb, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 465-6700 Dr. Mariam Hasan, M.DOakland, CA · $306 in drug and device payments (2025) · Telehealth ·
(408) 332-1755 Dr. Maria Webster-longin, MDOakland, CA · $238 in drug and device payments (2025) ·
(510) 238-5400 Dr. Marie Pierre, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Marilyn Ancel, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Marilyn Crim, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 338-0177 Dr. Marilyn Mccartney, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 567-5700 Dr. Mark Robb, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 535-3500 Dr. Marsha Nunley, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 893-3907 Dr. Martin Jimenez, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Martin Yu, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Marwan Abdelrahim, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-5039 Dr. Mary Patton, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Mary Rose Fabi, M.D.Oakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 267-7800 Dr. Matthew Frankel, M.D., M.B.AOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-4981 Dr. Maya IsaacsohnOakland, CA · No drug or device payments recorded (2025) ·
(510) 267-7800 Dr. Melissa Barker, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 433-1160 Dr. Melissa EelkemaOakland, CA · No drug or device payments recorded (2025) ·
(510) 567-5700 Dr. Melvin Weinert, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Merone Befekadu, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Michael Christensen, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. Michael Clement, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 Dr. Michael Kim, MDOakland, CA · $58 in drug and device payments (2025) · Telehealth ·
(510) 465-6700 Dr. Michael Ohabughiro, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-5039 Dr. Michael Philippone, DOOakland, CA · No drug or device payments recorded (2025) ·
(585) 466-4123 Dr. Michael Ralston, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 987-1000 Dr. Michael Song, D.O.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Min Yan, M.D.Oakland, CA · $12,834 in drug and device payments (2025) · Telehealth ·
(510) 830-3100 Dr. Miriam Salazar, MDOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. Mohammad Albaba, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 869-6883 Dr. Monish UllalOakland, CA · $111 in drug and device payments (2025) · Telehealth ·
(510) 437-4800 Dr. Morgen Yao-cohen, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 563-4300 Dr. Mueen Ghani, DOOakland, CA · $1,022 in drug and device payments (2025) ·
(510) 752-1000 Dr. Mutya Mithi Del RosarioOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Mychi Nguyen, M.D.Oakland, CA · No drug or device payments recorded (2025) ·
(510) 735-3888 Dr. Naama Leibushor, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Nadia Akhlaq, M.DOakland, CA · No drug or device payments recorded (2025) ·
(510) 437-4800 Dr. Nailah Thompson, DOOakland, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 752-1000 Dr. Nardine Riegels, MDOakland, CA · No drug or device payments recorded (2025) ·
(510) 752-1000 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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