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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. Aaron Rang, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (925) 634-9704
Dr. Abigail Wilson, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Adali Martinez
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8494
Dr. Adam Rao, MD/PHD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 833-2000
Dr. Adam Rogers, MD
San Francisco, CA · $85 in drug and device payments (2025) · (415) 476-1528
Dr. Adam Rosenblatt, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-0940
Dr. Adam Shurbaji, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. Adriana Martin, M.D., PH.D.
San Francisco, CA · $175 in drug and device payments (2025) · (415) 514-7288
Dr. Adrienne Green, MD
San Francisco, CA · $272 in drug and device payments (2025) · (415) 353-2823
Dr. Afsaneh Amouzegar, MD
San Francisco, CA · $140 in drug and device payments (2025) · Telehealth · (415) 353-9900
Dr. Ahsan Chaudhary, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-3034
Dr. Aidin Sabet, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-9182
Dr. Aileen Watanabe, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 292-3500
Dr. Aissatou Haman, MD
San Francisco, CA · $127 in drug and device payments (2025) · Telehealth · (415) 752-0100
Dr. Akshay Raizada, M.D., MPH
San Francisco, CA · No drug or device payments recorded (2025) · (323) 580-1307
Dr. Akshay Ravi
San Francisco, CA · No drug or device payments recorded (2025) · (408) 825-3828
Dr. Alan Lee, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-3034
Dr. Alan Leung, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 833-2200
Dr. Alanna Williams
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Alan Noble, M D
San Francisco, CA · No drug or device payments recorded (2025) · (415) 674-5200
Dr. Alan Rosenstein, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 370-7754
Dr. Alan Truong, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (800) 997-6196
Dr. Albert Huang, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. Albert Liu, MD
San Francisco, CA · $3,952 in drug and device payments (2025) · (415) 206-8317
Dr. Alegra Mendez, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. Alekist Quach
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Alexander Boaz, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-9986
Dr. Alexander Chang, M.D.
San Francisco, CA · $335 in drug and device payments (2025) · Telehealth · (415) 779-8332
Dr. Alexander Marson, M.D., PH.D.
San Francisco, CA · $9,492 in drug and device payments (2025) · (415) 353-2326
Dr. Alex Dinh
San Francisco, CA · $108 in drug and device payments (2025) · (415) 476-2172
Dr. Alexis Bayudan
San Francisco, CA · $1,156 in drug and device payments (2025) · Telehealth · (415) 347-6314
Dr. Alice Chen, MD MPH
San Francisco, CA · $23 in drug and device payments (2025) · (415) 206-8317
Dr. Alice Tang, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Alice Tang, PHD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7192
Dr. Alicia Darwin, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-3600
Dr. Alicia Fernandez, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8317
Dr. Alisa Oberschelp, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (628) 754-7700
Dr. Alisha Laborico, MD
San Francisco, CA · $14 in drug and device payments (2025) · (415) 833-2800
Dr. Alishba Ata, DO
San Francisco, CA · $206 in drug and device payments (2025) · (415) 404-3161
Dr. Alison Huang, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7300
Dr. Alison Ludwig, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 566-8141
Dr. Alison Ohringer, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7900
Dr. Alison Rustagi, MD, PHD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Alisson Sombredero Sanchez, M.D
San Francisco, CA · $271 in drug and device payments (2025) · Telehealth · (415) 600-4900
Dr. Aliza Rabinowitz, MD
San Francisco, CA · No drug or device payments recorded (2025) · (800) 997-6196
Dr. Alka Kanaya, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7300
Dr. Alla Boykoff, M.D.
San Francisco, CA · $3,621 in drug and device payments (2025) · Telehealth · (415) 447-0922
Dr. Allan Treadwell, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-2752
Dr. Allison Tzeng, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Allysa Lui, DO
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-5500

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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Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
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.