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. Lymar Bik, M.D.Atascadero, CA · $685 in drug and device payments (2025) · Telehealth ·
(805) 539-2031 Dr. Madeleine Hernandez, MDAtascadero, CA · No drug or device payments recorded (2025) ·
(805) 468-2000 Dr. Philip Wichmann, MDAtascadero, CA · No drug or device payments recorded (2025) ·
(805) 792-1400 Dr. Robin Alleyne, MD.Atascadero, CA · No drug or device payments recorded (2025) ·
(805) 792-1400 Dr. Stephen Shaw, M.D.Atascadero, CA · No drug or device payments recorded (2025) ·
(805) 468-2000 Dr. Timothy Tidwell, MDAtascadero, CA · $115 in drug and device payments (2025) · Telehealth ·
(805) 466-0676 Dr. Fatima Tehranchi, M.DAtherton, CA · No drug or device payments recorded (2025) ·
(650) 324-2499 Dr. Isha AbdullahAtherton, CA · No drug or device payments recorded (2025) ·
(650) 326-5010 Dr. Adrian Carreon, M.D.Atwater, CA · $355 in drug and device payments (2025) · Telehealth ·
(209) 381-0184 Dr. Alan Michel, M.D.Auburn, CA · No drug or device payments recorded (2025) ·
(530) 886-6558 Dr. Ali Mokhlesi, M.D.Auburn, CA · $19 in drug and device payments (2025) · Telehealth ·
(530) 886-2300 Dr. Apeet Hundal, MDAuburn, CA · No drug or device payments recorded (2025) · Telehealth ·
(530) 885-5618 Dr. Ardavan Afrasiabi, MDAuburn, CA · No drug or device payments recorded (2025) ·
(916) 733-3777 Dr. Bonnie Potter, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 823-2820 Dr. Dana Ciobanu, D.OAuburn, CA · No drug or device payments recorded (2025) ·
(530) 886-6558 Dr. Daniel Merck, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 885-5618 Dr. David Chihorek, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 886-2300 Dr. Elena Ralik, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 886-3439 Dr. Francisco Farias, MDAuburn, CA · No drug or device payments recorded (2025) · Telehealth ·
(530) 888-7616 Dr. Geralyn Flaig, M.D.Auburn, CA · No drug or device payments recorded (2025) ·
(916) 718-7482 Dr. Guadalupe Avila-kirwan, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 885-5610 Dr. James Drennan, M.D.Auburn, CA · No drug or device payments recorded (2025) ·
(530) 885-8223 Dr. Jaswant Virk, M.DAuburn, CA · No drug or device payments recorded (2025) ·
(530) 889-0707 Dr. Jose Miranda, M.D.Auburn, CA · $1,827 in drug and device payments (2025) · Telehealth ·
(530) 889-7439 Dr. Jyeping Tu, M.D.Auburn, CA · $111 in drug and device payments (2025) · Telehealth ·
(530) 886-2300 Dr. Kristin Ashley, M.D.Auburn, CA · No drug or device payments recorded (2025) ·
(530) 745-0709 Dr. Lars Jakobsen, M.D.Auburn, CA · No drug or device payments recorded (2025) · Telehealth ·
(530) 885-5618 Dr. Mihaela Hasse, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 889-8336 Dr. Nancy Shibayama, M.D. Dr. Narges Shariati Varnosfaderani, M.D.Auburn, CA · No drug or device payments recorded (2025) · Telehealth ·
(530) 885-5618 Dr. Neil Nedley, MDAuburn, CA · No drug or device payments recorded (2025) · Telehealth ·
(530) 823-5300 Dr. Patricia Lord, M.D.Auburn, CA · No drug or device payments recorded (2025) ·
(530) 889-7215 Dr. Qing Tang-oxley, M.D.Auburn, CA · No drug or device payments recorded (2025) · Telehealth ·
(530) 886-2300 Dr. Robert Hsu, M.D.Auburn, CA · No drug or device payments recorded (2025) ·
(530) 886-2300 Dr. Robert Koh, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 889-0872 Dr. Roxana Calmac, M.D.Auburn, CA · No drug or device payments recorded (2025) ·
(530) 886-6558 Dr. Sujata Narayanan, M.DAuburn, CA · No drug or device payments recorded (2025) ·
(530) 886-6558 Dr. Tatiana Korshunova, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 886-6558 Dr. William Brady, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 885-5618 Dr. Yasir Al-ani, MDAuburn, CA · No drug or device payments recorded (2025) ·
(530) 886-6558 Dr. Tomas Rios, M.D.Avenal, CA · No drug or device payments recorded (2025) ·
(559) 386-9000 Dr. Bhupinder Bains, M.DAzusa, CA · No drug or device payments recorded (2025) ·
(626) 334-7849 Dr. Bina Kamdar, MDAzusa, CA · No drug or device payments recorded (2025) ·
(626) 334-1611 Dr. Patricia Marquez, MDAzusa, CA · No drug or device payments recorded (2025) ·
(626) 347-5214 Dr. Adam Klang, MDBakersfield, CA · $117 in drug and device payments (2025) · Telehealth ·
(661) 843-7830 Dr. Akriti Chaudhry, MDBakersfield, CA · $674 in drug and device payments (2025) ·
(661) 326-2200 Dr. Alaleh Bazmi, M.D.Bakersfield, CA · $247 in drug and device payments (2025) · Telehealth ·
(661) 587-8110 Dr. Alan RaglandBakersfield, CA · No drug or device payments recorded (2025) ·
(661) 872-7000 Dr. Albert Peinado, MDBakersfield, CA · $21 in drug and device payments (2025) · Telehealth ·
(661) 327-1431 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.
Related reading on HealthcareDiscovery.AI
Internal Medicine in all 50 states Search all 17,715 in the directory Ask Zach for help choosing
Related
