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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 in Los Angeles1,417 providers
Internal Medicine in San Francisco1,322 providers
Internal Medicine in San Diego970 providers
Internal Medicine in Sacramento602 providers
Internal Medicine in Oakland434 providers
Internal Medicine in San Jose433 providers
Internal Medicine in Stanford383 providers
Internal Medicine in Fresno339 providers
Internal Medicine in Torrance230 providers
Internal Medicine in Long Beach225 providers
Internal Medicine in Bakersfield210 providers
Internal Medicine in Loma Linda209 providers
Internal Medicine in Palo Alto189 providers
Internal Medicine in Anaheim188 providers
Internal Medicine in Orange188 providers
Internal Medicine in Riverside188 providers
Internal Medicine in Walnut Creek184 providers
Internal Medicine in Santa Monica170 providers
Internal Medicine in La Jolla161 providers
Internal Medicine in Roseville159 providers
Internal Medicine in Irvine155 providers
Internal Medicine in Beverly Hills152 providers
Internal Medicine in Santa Clara142 providers
Internal Medicine in Pasadena138 providers

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. Tamara Robinson, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 764-1742
Dr. Tamika Coy
Sacramento, CA · $247 in drug and device payments (2025) · (916) 734-2737
Dr. Tan Duong, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 688-2000
Dr. Tania Dhawan
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-8611
Dr. Tatiana Getman, BS
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3565
Dr. Tejpal Dhillon, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Teresa Sandoval-phillips, M.D.
Sacramento, CA · $31 in drug and device payments (2025) · Telehealth · (916) 575-8000
Dr. Thao Huynh, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Thomas Chan, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5243
Dr. Thomas Christensen, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 549-8466
Dr. Tianyi Wang, M.D.
Sacramento, CA · $196 in drug and device payments (2025) · (925) 303-6385
Dr. Timothy Muldoon, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2011
Dr. Timothy Ngo, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 688-2000
Dr. Timothy Stocker, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Todd Fisher, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 691-5915
Dr. Todd Winters, MD
Sacramento, CA · $21 in drug and device payments (2025) · (916) 688-2000
Dr. Tom Koga, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Tonya Fancher, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Tooba Rehman Jahangir, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2016
Dr. Tracey Huey
Sacramento, CA · $101 in drug and device payments (2025) · (916) 734-2011
Dr. Tram Dao, DO
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2011
Dr. Tri-dung Hoang, M.D.
Sacramento, CA · $497 in drug and device payments (2025) · (916) 391-0170
Dr. Tyler Denman, MD
Sacramento, CA · $109 in drug and device payments (2025) · (415) 833-2000
Dr. Tyler O'flahrity, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5959
Dr. Umer Malik, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (775) 343-9981
Dr. Valerie Jaroenpuntaruk, MD
Sacramento, CA · $1,000 in drug and device payments (2025) · (312) 826-4563
Dr. Viangkaeo Lee, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2011
Dr. Vicki Nagano, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Vijay Kumar Bodukam, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. Vikrant Rachakonda, M.D.
Sacramento, CA · $17 in drug and device payments (2025) · Telehealth · (314) 614-4677
Dr. Vimal Mishra, MBBS
Sacramento, CA · No drug or device payments recorded (2025) · (804) 356-7010
Dr. Vinay Penmetcha, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. Voltaire Sinigayan, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Vong Lee, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Vu Nguyen, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-6097
Dr. Waqar Ali, M.D.
Sacramento, CA · $45 in drug and device payments (2025) · (916) 734-2737
Dr. War War Ko, MD
Sacramento, CA · $2,015 in drug and device payments (2025) · (916) 734-3037
Dr. Wei Fan, MD
Sacramento, CA · $130 in drug and device payments (2025) · (916) 688-2000
Dr. William Amess, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-2737
Dr. William Carrasco, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 973-5000
Dr. William Phillips, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 762-2510
Dr. William Tallakson, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Willis Bowman, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3564
Dr. Winifred Lee, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Winnie Tan, MD
Sacramento, CA · $48 in drug and device payments (2025) · (916) 973-5000
Dr. Xiaojing Ye, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 973-6624
Dr. Xin Yi Yu, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Yahanna Torres
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2011
Dr. Yasmeen Shaw, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3564
Dr. Yasser Mansour, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3333

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.

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

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Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Internal Medicine in California? Get featured.