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. Matthew Tsai, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Max Duesberg, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Maya Ramachandran, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Megan Galan, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Megan Lau, MDStanford, CA · No drug or device payments recorded (2025) ·
(640) 723-4000 Dr. Megha Shalavadi, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Mehdi Skhiri, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Mehrnaz Jamali, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Melanie Majure, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 498-4556 Dr. Melinda Wang, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Michael Ho, M.D.Stanford, CA · $211 in drug and device payments (2025) ·
(650) 799-5532 Dr. Michael Li, MD, PHDStanford, CA · No drug or device payments recorded (2025) ·
(650) 721-1300 Dr. Michael Pfeffer, M.D.Stanford, CA · $100 in drug and device payments (2025) ·
(650) 723-4000 Dr. Michael Turken, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Michele Barry, MDStanford, CA · $47 in drug and device payments (2025) ·
(650) 723-4000 Dr. Michele Kastelein, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 498-5710 Dr. Michelle Chiu, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Michelle Lo, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Michelle Tong, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Mingwei Yu, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Minh-chi Tran, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Minjoung Go, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Mita Hoppenfeld, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Mitchell Lunn, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Monica Attia, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Morgan Shannon, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Mugdha JoshiStanford, CA · $124 in drug and device payments (2025) ·
(650) 723-4000 Dr. Naman BarmanStanford, CA · $26 in drug and device payments (2025) ·
(650) 723-4000 Dr. Namphuong Tran, M.D.Stanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Nancy Cuan, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Nancy Liu, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Nancy Tibbs, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Naseem Rangwala, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Natasha Steele, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Navika ShuklaStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 Dr. Nazleen Bharmal, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Neda Pakdaman, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Neera Ahuja, MDStanford, CA · $2,941 in drug and device payments (2025) ·
(650) 723-4000 Dr. Neil Shah, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 725-3098 Dr. Nhi Nguyen, MDStanford, CA · $19 in drug and device payments (2025) ·
(650) 723-4000 Dr. Nidhi Rohatgi, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Niraj Sehgal, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Nisha Donthi, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Norman Downing, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Ola Al-ewaidat, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Oluseyi Fayanju, MDStanford, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Paden Angelo, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Parvathi Myer, MDStanford, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-6661 Dr. Patrick Gibbons, M.D.Stanford, CA · No drug or device payments recorded (2025) ·
(650) 498-7410 Dr. Pauldeep Mann, DOStanford, CA · $142 in drug and device payments (2025) ·
(650) 723-4000 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.
Related reading on HealthcareDiscovery.AI
Internal Medicine in all 50 states Search all 17,715 in the directory Ask Zach for help choosing
Related
