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. Hashim Deen, M.D.La Jolla, CA · $120 in drug and device payments (2025) ·
(800) 926-8273 Dr. Hilda Thorisdottir, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 552-8585 Dr. Hyong Kim, M.D.La Jolla, CA · $176,100 in drug and device payments (2025) · Telehealth ·
(858) 657-7150 Dr. James Jurica, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 534-2230 Dr. Jennifer Moitoza Johnson, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 626-7780 Dr. Jesse Degani, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 554-3200 Dr. Jessica Chen, MDLa Jolla, CA · No drug or device payments recorded (2025) · Telehealth ·
(858) 657-8000 Dr. Joanne Malinak, MDLa Jolla, CA · $39 in drug and device payments (2025) ·
(858) 554-3200 Dr. Jody Tai, DOLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 295-3054 Dr. Joel Diamant, M.D.La Jolla, CA · $15 in drug and device payments (2025) · Telehealth ·
(858) 554-7809 Dr. John Andrews, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 775-1976 Dr. John Bliamptis, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 657-5281 Dr. John O'feeLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 834-1798 Dr. Josef Bauer, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 554-7909 Dr. Joseph Andrews, M.D.La Jolla, CA · $431 in drug and device payments (2025) · Telehealth ·
(858) 554-7464 Dr. Joshua ChengLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 554-3200 Dr. Julia Yuan, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(800) 926-8273 Dr. Julie Papatheofanis, M.D.La Jolla, CA · $165 in drug and device payments (2025) · Telehealth ·
(858) 362-0616 Dr. Kara Kono, DOLa Jolla, CA · $391 in drug and device payments (2025) ·
(858) 824-5000 Dr. Karen Lei, MDLa Jolla, CA · $140 in drug and device payments (2025) ·
(858) 554-3200 Dr. Karla Malloy, M.D., PH.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 554-9500 Dr. Katherine HanLa Jolla, CA · $193 in drug and device payments (2025) · Telehealth ·
(858) 554-3200 Dr. Keval Patel, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 452-1279 Dr. Khai Nguyen, M.D., M.H.S.La Jolla, CA · No drug or device payments recorded (2025) · Telehealth ·
(858) 554-9500 Dr. Khamisah Barger, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 455-9100 Dr. Kimberly Khoury, M.D.La Jolla, CA · $164 in drug and device payments (2025) · Telehealth ·
(858) 554-7100 Dr. Kirk Peterson, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(619) 543-5666 Dr. Laith Enani, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 249-1702 Dr. Leila Rhodes, MDLa Jolla, CA · $80 in drug and device payments (2025) · Telehealth ·
(858) 454-5557 Dr. Leonard Lazarus, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 450-5286 Dr. Lewis Rubin, M.D.La Jolla, CA · $138,782 in drug and device payments (2025) ·
(858) 657-8700 Dr. Lina Dajani, M.D.La Jolla, CA · $34 in drug and device payments (2025) ·
(858) 554-7676 Dr. Lynette Cederquist, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 657-8000 Dr. Mansur Lee, M.D.La Jolla, CA · $84 in drug and device payments (2025) ·
(858) 455-9100 Dr. Mariam Camacho, MD, PHDLa Jolla, CA · $878 in drug and device payments (2025) · Telehealth ·
(858) 450-5900 Dr. Marianne Fahmy, M.D.La Jolla, CA · $25 in drug and device payments (2025) ·
(858) 552-8585 Dr. Mark Adrian, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 202-0011 Dr. Mark EsguerraLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 554-3200 Dr. Matan Khanian, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 657-7000 Dr. Matthew Jones, M. D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 554-3200 Dr. Melinda Chen, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 657-8000 Dr. Melissa Le Roux, MDLa Jolla, CA · $94 in drug and device payments (2025) · Telehealth ·
(858) 554-7272 Dr. Meral Omurtag, M.D.La Jolla, CA · $25 in drug and device payments (2025) ·
(858) 554-6158 Dr. Merritt Hougen, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(858) 554-7810 Dr. Michael Maywood, MDLa Jolla, CA · $210 in drug and device payments (2025) ·
(858) 453-7209 Dr. Michelle Abbo, M.D.La Jolla, CA · $22 in drug and device payments (2025) ·
(858) 454-9045 Dr. Minh Nguyen, M.D.La Jolla, CA · No drug or device payments recorded (2025) ·
(619) 670-5400 Dr. Mirza Raheem, M.D.La Jolla, CA · $242 in drug and device payments (2025) ·
(858) 554-1212 Dr. Mitchell Prins, MDLa Jolla, CA · No drug or device payments recorded (2025) ·
(858) 554-3200 Dr. Monica Perlman, M.D.La Jolla, CA · $4,204 in drug and device payments (2025) · Telehealth ·
(858) 554-1212 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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