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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. Elaine Madayag-capuno, MD
Oakdale, CA · No drug or device payments recorded (2025) · Telehealth · (209) 847-2920
Dr. Nguyen Pham, MD
Oakdale, CA · No drug or device payments recorded (2025) · (209) 848-7026
Dr. Upinder Basi, MD
Oakdale, CA · $114 in drug and device payments (2025) · Telehealth · (209) 847-0314
Dr. Daniel Crogan, MD
Oakhurst, CA · No drug or device payments recorded (2025) · (800) 262-6663
Dr. Florence Leung, MD
Oakhurst, CA · No drug or device payments recorded (2025) · (800) 262-6663
Dr. Gyan Kayastha, MD
Oakhurst, CA · $108 in drug and device payments (2025) · (559) 664-4000
Dr. Rex Nzeribe, M.D.
Oakhurst, CA · No drug or device payments recorded (2025) · (559) 664-4000
Dr. Aamra Sheikh, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Aaron Smith, MD
Oakland, CA · No drug or device payments recorded (2025) · (408) 394-9197
Dr. Abdul Raif Jawid, M.D
Oakland, CA · $221 in drug and device payments (2025) · Telehealth · (510) 347-4141
Dr. Adam Mortimer, DO
Oakland, CA · No drug or device payments recorded (2025) · (510) 437-5039
Dr. Adelaida Alfiler, MD
Oakland, CA · No drug or device payments recorded (2025) · Telehealth · (510) 437-4800
Dr. Adi Bamnolker, DO
Oakland, CA · No drug or device payments recorded (2025) · (510) 367-8373
Dr. Aditya Gangopadhyay, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Adrian James, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 835-9610
Dr. Ajay Ohri, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 437-5039
Dr. Akiko Tsuzuki, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Akua Brown, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 621-7761
Dr. Alan Cohen, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 893-0328
Dr. Alan Go, MD
Oakland, CA · $970 in drug and device payments (2025) · (510) 987-1000
Dr. Albert Mazzie, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 836-8929
Dr. Albert Yu, MD
Oakland, CA · $46 in drug and device payments (2025) · Telehealth · (510) 752-1000
Dr. Alejandra Chavez Carrera, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 437-5039
Dr. Alejandro Diaz, MD
Oakland, CA · $62 in drug and device payments (2025) · (510) 437-4887
Dr. Alexis Ludi
Oakland, CA · No drug or device payments recorded (2025) · (510) 267-7800
Dr. Alisa Takeda, D.O.
Oakland, CA · No drug or device payments recorded (2025) · (510) 986-6800
Dr. Alix Magloire, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 267-7925
Dr. Aliza Ali, DO
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Amardeep Mangat, DO
Oakland, CA · No drug or device payments recorded (2025) · (510) 437-4800
Dr. Ameena Ahmed, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 987-1000
Dr. Amy Garlin, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 869-8400
Dr. Amy Matecki, MD
Oakland, CA · $151 in drug and device payments (2025) · (510) 869-6740
Dr. Anastasia Cua, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Anastasia Misakian, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-5354
Dr. Andrea Chai, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-6126
Dr. Andrea Glassberg, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Andreas Mitchell
Oakland, CA · No drug or device payments recorded (2025) · (510) 777-1177
Dr. Andrew Avins, M.D.
Oakland, CA · No drug or device payments recorded (2025) · Telehealth · (510) 891-5957
Dr. Andrew Langfield, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 437-5039
Dr. Angel Mendoza-gonzalez
Oakland, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Anita Chang, MD
Oakland, CA · $17 in drug and device payments (2025) · (510) 986-6800
Dr. Anna Maguire, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Annemarie Mallick, D.O.
Oakland, CA · No drug or device payments recorded (2025) · (510) 437-4403
Dr. Anne Young
Oakland, CA · No drug or device payments recorded (2025) · (510) 437-5039
Dr. Anthony Iton, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 267-8012
Dr. Anthony Ko, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Anthony Ravnik, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 452-4824
Dr. Anthony Tsao, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 805-0985
Dr. Antonia Torreblanca, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Anupama Raikanti, M.D.
Oakland, CA · No drug or device payments recorded (2025) · (510) 535-7540

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.