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. Shing Cheng, M.D.Compton, CA · $25 in drug and device payments (2025) · Telehealth ·
(424) 338-1000 Dr. Alireza Rezapour, M.DConcord, CA · No drug or device payments recorded (2025) ·
(925) 363-2000 Dr. Anna Chang, M.D.Concord, CA · $984 in drug and device payments (2025) · Telehealth ·
(925) 687-8860 Dr. Arseen Soliman, M.D.Concord, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 677-0500 Dr. Chinnavuth De Monteiro, M.D.Concord, CA · $1,809 in drug and device payments (2025) ·
(925) 687-5210 Dr. David Bressler, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 677-0500 Dr. Hari Samplay, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 597-0202 Dr. Huaming Chou, MDConcord, CA · No drug or device payments recorded (2025) ·
(707) 334-7264 Dr. John Hiss, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 674-2609 Dr. Johnson Adeyanju, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 677-0500 Dr. Jose Arias-veraConcord, CA · $186 in drug and device payments (2025) · Telehealth ·
(925) 603-1363 Dr. Juana Gonzalez Aguirre, M.D.Concord, CA · $155 in drug and device payments (2025) · Telehealth ·
(925) 677-0500 Dr. Julie Cahill, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 677-0500 Dr. Jyoti Bhat, M.D.Concord, CA · $1,414 in drug and device payments (2025) · Telehealth ·
(925) 685-4228 Dr. Kausalya Chennapragada, M.D.Concord, CA · $39 in drug and device payments (2025) · Telehealth ·
(925) 677-0500 Dr. Lindsay Klein, MDConcord, CA · No drug or device payments recorded (2025) ·
(925) 677-0500 Dr. Lori Danze, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 687-5210 Dr. Melanie Lee, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 677-0500 Dr. Robert Davidson, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 677-0500 Dr. Roy Kaplan, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 952-2888 Dr. Samir Mahmoud, MDConcord, CA · No drug or device payments recorded (2025) ·
(925) 708-1102 Dr. Sam Sundar, MDConcord, CA · No drug or device payments recorded (2025) ·
(925) 680-6846 Dr. Sandeep Sarkaria, MDConcord, CA · $2,351 in drug and device payments (2025) · Telehealth ·
(925) 685-4224 Dr. Stacy Ly, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 674-2609 Dr. Stacy ZambranoConcord, CA · No drug or device payments recorded (2025) ·
(925) 363-2000 Dr. Vinita Jain, M.D.Concord, CA · $848 in drug and device payments (2025) · Telehealth ·
(925) 686-0259 Dr. Vivekanand Jain, M.D.Concord, CA · $770 in drug and device payments (2025) ·
(925) 686-0259 Dr. Yashwant Mehta, M.D.Concord, CA · No drug or device payments recorded (2025) ·
(925) 967-4260 Dr. Zita Shiue, M.D.Concord, CA · $288 in drug and device payments (2025) · Telehealth ·
(215) 605-0894 Dr. Beverly Mikuriya, MDCool, CA · No drug or device payments recorded (2025) ·
(530) 888-9020 Dr. Godwin Ugwueze, MDCorcoran, CA · $22 in drug and device payments (2025) ·
(559) 992-7100 Dr. Khin Aye, MDCorcoran, CA · No drug or device payments recorded (2025) ·
(559) 992-8800 Dr. Kim NguyenCorcoran, CA · $283 in drug and device payments (2025) ·
(559) 992-7100 Dr. Mayer HorenstenCorcoran, CA · No drug or device payments recorded (2025) ·
(559) 992-7100 Dr. Ngozi Igbinosa, M.DCorcoran, CA · $156 in drug and device payments (2025) ·
(559) 992-8800 Dr. Olga BeregovskayaCorcoran, CA · $39 in drug and device payments (2025) ·
(559) 992-7100 Dr. Perlita McguinnessCorcoran, CA · No drug or device payments recorded (2025) ·
(559) 992-7100 Dr. William Mcguinness, M.D.Corcoran, CA · No drug or device payments recorded (2025) ·
(559) 992-8800 Dr. Arnold Lee, M.D.Corning, CA · No drug or device payments recorded (2025) ·
(530) 824-4663 Dr. Grant Trimble, PA-CCorning, CA · No drug or device payments recorded (2025) ·
(530) 824-4002 Dr. Perla Inacay, M.D.Corning, CA · No drug or device payments recorded (2025) ·
(530) 824-4663 Dr. Adriane DullCorona, CA · No drug or device payments recorded (2025) ·
(951) 339-8459 Dr. Amir Rahnavard, D.O.Corona, CA · $1,139 in drug and device payments (2025) ·
(951) 268-6272 Dr. Amit Hiteshi, M.D.Corona, CA · $247 in drug and device payments (2025) · Telehealth ·
(951) 493-0037 Dr. Christine Adekayode, DO Dr. Christine Duong, MDCorona, CA · No drug or device payments recorded (2025) ·
(951) 817-8820 Dr. Christine Sun, M.D.Corona, CA · No drug or device payments recorded (2025) ·
(818) 895-3100 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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