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. Alvin Rafou, DOVentura, CA · No drug or device payments recorded (2025) ·
(805) 948-5672 Dr. Amanda Frugoli, D.OVentura, CA · $21 in drug and device payments (2025) · Telehealth ·
(805) 652-5652 Dr. Anand Rajan, MDVentura, CA · $166 in drug and device payments (2025) · Telehealth ·
(805) 641-6525 Dr. Andrew Binder, M.D.Ventura, CA · $509 in drug and device payments (2025) · Telehealth ·
(805) 676-9100 Dr. Angela Rabkin, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 652-6556 Dr. Aspram Sargsyan, DOVentura, CA · No drug or device payments recorded (2025) ·
(916) 768-0697 Dr. Becky Wade, M.D.Ventura, CA · $49 in drug and device payments (2025) · Telehealth ·
(805) 914-5808 Dr. Charles Pankratz, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 667-2273 Dr. Chetan Gondha, MDVentura, CA · $144 in drug and device payments (2025) · Telehealth ·
(805) 641-6525 Dr. Christine Brown, MBS, DOVentura, CA · No drug or device payments recorded (2025) ·
(805) 948-5672 Dr. Christopher Mckinney, MDVentura, CA · No drug or device payments recorded (2025) ·
(805) 652-5652 Dr. Dana Jennings, M.D.Ventura, CA · $21 in drug and device payments (2025) · Telehealth ·
(805) 914-5808 Dr. Daniel Clark, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 652-6556 Dr. David Chernof, MDVentura, CA · No drug or device payments recorded (2025) ·
(805) 403-0775 Dr. Deborah Carlson, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 652-5011 Dr. Dena Werner, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 667-2841 Dr. Doina Galiatzatos, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 477-6000 Dr. Eric Leibovitch, M.D.Ventura, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 652-6556 Dr. Ethan Lieberman, MDVentura, CA · No drug or device payments recorded (2025) ·
(818) 719-2706 Dr. Gail Simpson, M.D.Ventura, CA · $119 in drug and device payments (2025) ·
(805) 477-6464 Dr. Hannah Robinson, D.O., M.P.H.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 652-5652 Dr. Ian Cahatol, DOVentura, CA · No drug or device payments recorded (2025) ·
(805) 652-5672 Dr. Ilona Sylvester, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 659-1740 Dr. James Estes, M.D.Ventura, CA · $115 in drug and device payments (2025) ·
(805) 477-6464 Dr. James Mitchell, MDVentura, CA · $168 in drug and device payments (2025) ·
(805) 585-3086 Dr. Jeanette Ilarde, MDVentura, CA · $33 in drug and device payments (2025) · Telehealth ·
(805) 644-9121 Dr. Joel Alpern, M.D.Ventura, CA · $206 in drug and device payments (2025) · Telehealth ·
(805) 641-6525 Dr. John Dexter, MDVentura, CA · $146 in drug and device payments (2025) ·
(805) 585-3086 Dr. Juula Roman, M.DVentura, CA · No drug or device payments recorded (2025) ·
(805) 948-5652 Dr. Karen Lockwood, MDVentura, CA · No drug or device payments recorded (2025) ·
(888) 515-3500 Dr. Kooros Samadzadeh, D.O.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 652-5652 Dr. Leah Kory, MDVentura, CA · No drug or device payments recorded (2025) ·
(805) 652-5011 Dr. Mark Mccamish, MDVentura, CA · $93,373 in drug and device payments (2025) ·
(805) 660-1244 Dr. Melissa Russell, DOVentura, CA · No drug or device payments recorded (2025) ·
(805) 948-5672 Dr. Michael Eden, D.OVentura, CA · No drug or device payments recorded (2025) ·
(805) 652-5011 Dr. Michele Cunneen, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 642-8107 Dr. Naila JavaidVentura, CA · No drug or device payments recorded (2025) ·
(805) 658-5800 Dr. Nugdeep Singh, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 948-5672 Dr. Oltita Tirzaman, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 477-6464 Dr. Peter Kelly, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 652-6100 Dr. Puneet Khandelwal, D.O.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 652-5011 Dr. Raagav Mohanakrishnan, DO, MPHVentura, CA · No drug or device payments recorded (2025) ·
(855) 736-2789 Dr. Rahul JalotaVentura, CA · No drug or device payments recorded (2025) ·
(805) 948-5672 Dr. Ramsey Ulrich, M.D.Ventura, CA · $373 in drug and device payments (2025) · Telehealth ·
(805) 585-5562 Dr. Rokhsan Taherpour, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 477-6464 Dr. Rola Magid, M.D.Ventura, CA · No drug or device payments recorded (2025) ·
(805) 658-0113 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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