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. Kevin Lutley, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Kevin Schulman, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Kim Chiang, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Kirsten Regalia, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Korina De Bruyne, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Kurt Hafer, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Latha Palaniappan, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Laura Derry, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Laura Vaughan, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Laurel Dawson, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Lauren Ammerman, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Lauren Cheung, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 725-5071 Dr. Lauren Edwards, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Lauren Ulsh, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Lawrence Goodnough, MDStanford, CA · $285 in drug and device payments (2025) ·
(650) 723-5848 Dr. Lawrence Kwan, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Lijia Xie, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Lily Horng, MDStanford, CA · No drug or device payments recorded (2025) ·
(203) 675-2881 Dr. Lina Vadlamani, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Linda Barman, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Linda GengStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Linda Wang, MDStanford, CA · $48 in drug and device payments (2025) ·
(650) 723-4000 Dr. Linda Ye, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Lindsey Haddock, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Lisa Chang, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Lisa Quach, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Lisa Shieh, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 724-2917 Dr. Lucy Kalanithi, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Lucy StudemeisterStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-9062 Dr. Luis Rivera Delgado, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Lynn Ngo, MDStanford, CA · $21 in drug and device payments (2025) · Telehealth ·
(650) 723-4000 Dr. Madhav Goyal, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Maiko Shiota, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 123-3300 Dr. Maja Artandi, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Mala Sanchez, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Malathi Srinivasan, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Manish Paranjpe, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Marcie Levine, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Margaret Shyu, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Maria Juarez-reyes, MD, PHDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Marianne Yeung, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(415) 871-1465 Dr. Marie-luise Brennan, MD, PHDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Mark Heslin, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Mark Jaradeh, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Mary Olomu, MDStanford, CA · $115 in drug and device payments (2025) ·
(650) 723-2300 Dr. Matthew Alkaitis, MDStanford, CA · $65 in drug and device payments (2025) ·
(650) 723-4000 Dr. Matthew Gubens, MDStanford, CA · $30,909 in drug and device payments (2025) · Telehealth ·
(650) 723-6661 Dr. Matthew Mesias, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Matthew Morrin, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Matthew Pascucci, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 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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