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. Liana Gonzalez, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 681-1760 Dr. Magdalena Ruiz, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7315 Dr. Marcia Smith, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 687-3396 Dr. Marie Claire Lamb, M.D.Santa Barbara, CA · $408 in drug and device payments (2025) · Telehealth ·
(805) 898-0500 Dr. Marjorie Newman, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 681-1761 Dr. Mark BookspanSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-3610 Dr. Mark Juretic, MDSanta Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 681-7602 Dr. Marta Sovilj, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 681-1761 Dr. Matthew Payne, M.D.Santa Barbara, CA · $1,849 in drug and device payments (2025) · Telehealth ·
(805) 886-4370 Dr. Matti Jansen, M.D.Santa Barbara, CA · $140 in drug and device payments (2025) · Telehealth ·
(805) 682-3771 Dr. Maya Antony, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 681-5488 Dr. Michael Bernstein, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 681-1761 Dr. Michael Bordofsky, MDSanta Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 563-3234 Dr. Michael Kearney, MDSanta Barbara, CA · $32 in drug and device payments (2025) ·
(805) 453-0596 Dr. Nancy Furman-alex, D.O.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 845-2219 Dr. Nancy Rikalo, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 617-0049 Dr. Naomi Parry, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 681-0273 Dr. Nastassia Sylvestre, MDSanta Barbara, CA · $67 in drug and device payments (2025) · Telehealth ·
(805) 682-7111 Dr. Nicole Stern, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 681-1760 Dr. Paloma Ochoa, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7315 Dr. Patrick Frawley, MDSanta Barbara, CA · $107 in drug and device payments (2025) · Telehealth ·
(805) 730-1580 Dr. Paul Aijian, M.D.Santa Barbara, CA · $116 in drug and device payments (2025) · Telehealth ·
(805) 682-7201 Dr. Paul Ryack, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 964-9858 Dr. Philip Wan, D.O.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7315 Dr. Phoebe Garcia, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 681-5488 Dr. Pierre NizetSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 969-5052 Dr. Priti Gagneja, MDSanta Barbara, CA · $205 in drug and device payments (2025) · Telehealth ·
(805) 681-1761 Dr. Richard Danson, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 682-1934 Dr. Richard Huffard, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 965-3011 Dr. Richard Ponce, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 681-1761 Dr. Robert Byers, M.D.Santa Barbara, CA · $1,000 in drug and device payments (2025) · Telehealth ·
(805) 563-0855 Dr. Robert Gaines, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 683-1491 Dr. Robert Kershaw, MDSanta Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 681-7602 Dr. Robert Zylstra, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-0414 Dr. Roopa Chari, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 963-1111 Dr. Roxana Ledig, M.D.Santa Barbara, CA · $177 in drug and device payments (2025) · Telehealth ·
(805) 682-3771 Dr. Samantha Bessega, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 683-1491 Dr. Sandra Kramer, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 898-3118 Dr. Sawyer Haig, D.O.Santa Barbara, CA · $493 in drug and device payments (2025) · Telehealth ·
(805) 682-1934 Dr. Sergio Rubio, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 618-2109 Dr. Shahram Shafi, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) · Telehealth ·
(805) 565-0020 Dr. Steven Young, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-1560 Dr. Summer Baird, M.D.Santa Barbara, CA · $155 in drug and device payments (2025) ·
(805) 681-7500 Dr. Sunita Beall, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 893-5361 Dr. Sushila Braganza, M.D.Santa Barbara, CA · $138 in drug and device payments (2025) ·
(805) 681-1761 Dr. Sylvia Filipov, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 683-1491 Dr. Thaddeus Bordofsky, M.D.Santa Barbara, CA · No drug or device payments recorded (2025) ·
(805) 569-7315 Dr. Thomas Martinelli, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 617-7858 Dr. Tiffany Vanderlip, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-7111 Dr. Timothy Rodgers, MDSanta Barbara, CA · No drug or device payments recorded (2025) ·
(805) 682-3771 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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