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. Michael Alper, M.D.Livermore, CA · $226 in drug and device payments (2025) · Telehealth ·
(925) 373-0710 Dr. Nader Kaldas, M.D.Livermore, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 443-0313 Dr. Ryan Wu, MDLivermore, CA · No drug or device payments recorded (2025) ·
(925) 243-2600 Dr. Sahana Sridhar, MDLivermore, CA · No drug or device payments recorded (2025) ·
(925) 243-2600 Dr. Samata Kanagala, M.DLivermore, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 373-4700 Dr. Sheri Morris, MDLivermore, CA · $17 in drug and device payments (2025) ·
(925) 243-2600 Dr. Suet Yin Yu, M.D.Livermore, CA · No drug or device payments recorded (2025) ·
(925) 373-4700 Dr. Timoteo Canio, MDLivermore, CA · No drug or device payments recorded (2025) ·
(925) 243-2600 Dr. Vandana Jain, MDLivermore, CA · $142 in drug and device payments (2025) · Telehealth ·
(925) 243-2600 Dr. Xiaobo Wang, M.D.Livermore, CA · No drug or device payments recorded (2025) · Telehealth ·
(925) 243-2700 Dr. Yan Dai, MDLivermore, CA · No drug or device payments recorded (2025) ·
(925) 243-2600 Dr. Beien ShiLodi, CA · No drug or device payments recorded (2025) ·
(209) 334-3411 Dr. Corey Colla, MDLodi, CA · No drug or device payments recorded (2025) ·
(209) 366-2001 Dr. Dominic Pennisi, M.D.Lodi, CA · $354 in drug and device payments (2025) · Telehealth ·
(209) 365-9331 Dr. Gayathri Devi Kalva, M.D. Dr. Joseph Gayagoy, M.D.Lodi, CA · $3,533 in drug and device payments (2025) · Telehealth ·
(209) 366-2060 Dr. Joseph Johnson, MDLodi, CA · $164 in drug and device payments (2025) · Telehealth ·
(209) 366-2001 Dr. Joseph Prinsen, D.O., PH.D.Lodi, CA · No drug or device payments recorded (2025) ·
(209) 334-3411 Dr. Lily Tumbaga-notario, M.D.Lodi, CA · $70 in drug and device payments (2025) · Telehealth ·
(209) 366-2001 Dr. Mani Mahdyoon, MDLodi, CA · $1,636 in drug and device payments (2025) · Telehealth ·
(209) 366-2360 Dr. Melvin De La Cruz, M.D. Dr. Michael Purviance, MDLodi, CA · No drug or device payments recorded (2025) ·
(209) 334-3411 Dr. Mobin Ghavami, M.D.Lodi, CA · $3,819 in drug and device payments (2025) · Telehealth ·
(209) 333-2500 Dr. Nanying LiLodi, CA · No drug or device payments recorded (2025) ·
(209) 334-3411 Dr. Narinder Dhaliwal, M.D.Lodi, CA · $622 in drug and device payments (2025) · Telehealth ·
(209) 334-8540 Dr. Rajeev Shukla, MDLodi, CA · $2,012 in drug and device payments (2025) · Telehealth ·
(209) 224-5385 Dr. Rod FelberLodi, CA · No drug or device payments recorded (2025) ·
(209) 334-3411 Dr. Shefali Awatani, MDLodi, CA · No drug or device payments recorded (2025) ·
(209) 334-3411 Dr. Tarandeep Arora, MDLodi, CA · $153 in drug and device payments (2025) · Telehealth ·
(209) 366-2001 Dr. Tomio Odama, M.D.Lodi, CA · No drug or device payments recorded (2025) ·
(209) 333-2551 Dr. You-tan Yeh, M.D.Lodi, CA · No drug or device payments recorded (2025) · Telehealth ·
(209) 366-2001 Dr. Adrian Cotton, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-2191 Dr. Afzal Sheikh, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-4884 Dr. Alan WeiLoma Linda, CA · $23 in drug and device payments (2025) · Telehealth ·
(909) 558-4174 Dr. Amanda Etheridge, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(618) 599-9904 Dr. Amandeep Sidhu, DOLoma Linda, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 558-4074 Dr. Ambika Sivanandam, MDLoma Linda, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 558-4950 Dr. Amy Hayton, MDLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 528-4000 Dr. Amy Schill-depew, MDLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-4000 Dr. Andrea Lee Anderson, M.D.Loma Linda, CA · $189 in drug and device payments (2025) ·
(909) 558-4499 Dr. Andrea Xianglin SeahLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-4074 Dr. Andrew LoganLoma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-4074 Dr. Angela Williams, MDLoma Linda, CA · $97 in drug and device payments (2025) ·
(099) 825-7084 Dr. Anh Tuan Pham, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-4499 Dr. Annie Park, M.DLoma Linda, CA · $83 in drug and device payments (2025) · Telehealth ·
(909) 558-4910 Dr. Anthony Lim, MDLoma Linda, CA · $517 in drug and device payments (2025) ·
(909) 558-6131 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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