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. Kurene Ma'o, M.D.Carson, CA · No drug or device payments recorded (2025) ·
(310) 835-6627 Dr. Lynn Coates, MDCarson, CA · No drug or device payments recorded (2025) ·
(310) 233-3228 Dr. Maria Cecilia Canlas, MDCarson, CA · No drug or device payments recorded (2025) ·
(310) 518-6246 Dr. Osman Alvarado Portillo, MDCarson, CA · No drug or device payments recorded (2025) ·
(310) 233-3203 Dr. Ronald Tejada, MDCarson, CA · No drug or device payments recorded (2025) ·
(424) 444-5097 Dr. Samuel Mogul, M.D.Castaic, CA · No drug or device payments recorded (2025) ·
(661) 476-8799 Dr. Andrea Dhaliwal, M.D.Castro Valley, CA · No drug or device payments recorded (2025) ·
(510) 889-5082 Dr. Diana Hess, MDCastro Valley, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 886-3400 Dr. Donald Knotts, MEDICAL DOCTORCastro Valley, CA · No drug or device payments recorded (2025) ·
(510) 886-3701 Dr. Helen Yang, MDCastro Valley, CA · $23 in drug and device payments (2025) ·
(510) 806-2100 Dr. Kathryn Hodge, MDCastro Valley, CA · No drug or device payments recorded (2025) ·
(510) 889-5082 Dr. Khoa Nguyen, M.D.Castro Valley, CA · No drug or device payments recorded (2025) ·
(510) 727-3256 Dr. Laurie Nakahira, MDCastro Valley, CA · No drug or device payments recorded (2025) ·
(510) 889-5082 Dr. Ling Xu, M.D.Castro Valley, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 785-5000 Dr. Mahendra Patel, MDCastro Valley, CA · No drug or device payments recorded (2025) ·
(650) 400-2546 Dr. Monica Bhargava, MDCastro Valley, CA · No drug or device payments recorded (2025) ·
(510) 889-5082 Dr. Mridula Rewal, MDCastro Valley, CA · No drug or device payments recorded (2025) ·
(510) 727-3256 Dr. Nabil Abudayeh, MDCastro Valley, CA · $969 in drug and device payments (2025) · Telehealth ·
(510) 886-6878 Dr. Nazia Mir, MDCastro Valley, CA · No drug or device payments recorded (2025) ·
(510) 727-3256 Dr. Nidhi Johri, M.DCastro Valley, CA · $110 in drug and device payments (2025) · Telehealth ·
(510) 785-5000 Dr. Omar Saleem, MDCastro Valley, CA · No drug or device payments recorded (2025) ·
(510) 727-3256 Dr. Petr Utrata, M.D.Castro Valley, CA · No drug or device payments recorded (2025) ·
(650) 288-8344 Dr. Rahel RuizCastro Valley, CA · $26 in drug and device payments (2025) ·
(510) 881-2192 Dr. Richard Ho, M. D.Castro Valley, CA · No drug or device payments recorded (2025) · Telehealth ·
(510) 581-2559 Dr. Saima Mahmood, MDCastro Valley, CA · No drug or device payments recorded (2025) ·
(256) 473-9788 Dr. Samir Kadada, M.D.Castro Valley, CA · No drug or device payments recorded (2025) ·
(206) 375-0593 Dr. Sarah Noonberg, MD, PHDCastro Valley, CA · No drug or device payments recorded (2025) ·
(510) 889-5082 Dr. Shiven Chaudhry, MDCastro Valley, CA · $22 in drug and device payments (2025) ·
(510) 785-5000 Dr. Stefani Wedl, MDCastro Valley, CA · No drug or device payments recorded (2025) ·
(510) 889-5082 Dr. Wing Chin, M.D.Castro Valley, CA · No drug or device payments recorded (2025) ·
(510) 886-2311 Dr. Abram Soliman, MDCathedral City, CA · $613 in drug and device payments (2025) ·
(760) 837-8993 Dr. Carlos Gutierrez Garibay, MDCathedral City, CA · No drug or device payments recorded (2025) ·
(760) 837-8993 Dr. Clayton Barbour, M.D.Cathedral City, CA · $194 in drug and device payments (2025) ·
(760) 507-3310 Dr. Gary Huang, MDCathedral City, CA · $34 in drug and device payments (2025) ·
(760) 773-1680 Dr. Janpreet Bhandohal, M.D.Cathedral City, CA · $86 in drug and device payments (2025) · Telehealth ·
(760) 837-8993 Dr. Namrata Sekhon, M.D.Cathedral City, CA · $86 in drug and device payments (2025) · Telehealth ·
(760) 837-8993 Dr. Roy Young, MDCathedral City, CA · No drug or device payments recorded (2025) ·
(760) 837-8993 Dr. Ruba Alchaikh HassanCathedral City, CA · No drug or device payments recorded (2025) ·
(760) 837-8993 Dr. Victoria Malkhasyan, M.D.Cathedral City, CA · $389 in drug and device payments (2025) ·
(760) 321-6776 Dr. Wendell Wyatt, M.D.Cathedral City, CA · No drug or device payments recorded (2025) ·
(760) 406-3234 Dr. William Christensen, MDCathedral City, CA · No drug or device payments recorded (2025) ·
(760) 328-5679 Dr. Ellen Greenman, MDCayucos, CA · No drug or device payments recorded (2025) ·
(805) 995-3994 Dr. Patricia Chang, M.D.Century City, CA · $1,057 in drug and device payments (2025) ·
(310) 556-8899 Dr. Robert Southmayd, D.O. Dr. Anthony Nguyen, M.D.Cerritos, CA · No drug or device payments recorded (2025) ·
(562) 977-4639 Dr. Ardavan Mehdizadeh, M.D.Cerritos, CA · $308 in drug and device payments (2025) ·
(562) 207-0139 Dr. Benjamin Winarko, M.D.Cerritos, CA · No drug or device payments recorded (2025) ·
(800) 823-4040 Dr. Denise Park, MDCerritos, CA · No drug or device payments recorded (2025) ·
(562) 653-5032 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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