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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. Yo Sup Keum, MD
Sacramento, CA · $200 in drug and device payments (2025) · Telehealth · (916) 733-3400
Dr. Young Il Kang, MD
Sacramento, CA · $104 in drug and device payments (2025) · (171) 433-5935
Dr. Zachary Holt, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-7080
Dr. Zachary Taylor, M.D.
Sacramento, CA · $32 in drug and device payments (2025) · Telehealth · (916) 731-7858
Dr. Zahid Iqbal, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 546-5320
Dr. Zaida Albarracin
Sacramento, CA · No drug or device payments recorded (2025) · (916) 453-4966
Dr. Arun Hatwalkar, MD
Saint Helena, CA · No drug or device payments recorded (2025) · (707) 963-6399
Dr. Elizabeth Wasson, MD
Saint Helena, CA · No drug or device payments recorded (2025) · (707) 963-6399
Dr. Heather Pena, MD
Saint Helena, CA · No drug or device payments recorded (2025) · (707) 967-9000
Dr. Hirofumi Hashimoto, MD
Saint Helena, CA · No drug or device payments recorded (2025) · (707) 963-6399
Dr. John Hart, MD
Saint Helena, CA · $14 in drug and device payments (2025) · (707) 963-6399
Dr. Katherine Williams, M.D.
Saint Helena, CA · No drug or device payments recorded (2025) · (707) 758-5936
Dr. Leah Grabenauer, MD
Saint Helena, CA · No drug or device payments recorded (2025) · (707) 963-6399
Dr. Matthew Corvo, MD
Saint Helena, CA · $55 in drug and device payments (2025) · (707) 967-1914
Dr. Padmaja Manyam, M.D.
Saint Helena, CA · No drug or device payments recorded (2025) · (347) 229-3632
Dr. Sahiba Bajwa, MD
Saint Helena, CA · No drug or device payments recorded (2025) · (650) 402-8643
Dr. Susan Gamble, M.D.
Saint Helena, CA · No drug or device payments recorded (2025) · (707) 963-2002
Dr. Alan Rosenthal, DO
Salinas, CA · No drug or device payments recorded (2025) · (831) 770-0444
Dr. Alex Ecarma, M.D.
Salinas, CA · No drug or device payments recorded (2025) · (831) 757-4333
Dr. Alfred Sadler, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 443-8200
Dr. Chandrika Krishna, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 754-2222
Dr. Colleen Caprio, M.D.
Salinas, CA · $199 in drug and device payments (2025) · (831) 759-3257
Dr. Daniel Hoberman, M.D.
Salinas, CA · No drug or device payments recorded (2025) · (831) 759-3257
Dr. Daniel Magana Villalobos, MD
Salinas, CA · $90 in drug and device payments (2025) · (831) 757-1365
Dr. Dawn Mudge, M.D
Salinas, CA · $380 in drug and device payments (2025) · Telehealth · (831) 751-7070
Dr. Eva Perusquia Frias, MD
Salinas, CA · $231 in drug and device payments (2025) · (831) 757-8689
Dr. Glenn Yoneda, MD
Salinas, CA · $1,612 in drug and device payments (2025) · Telehealth · (831) 751-7070
Dr. Hami Ebrahimi, M.D.
Salinas, CA · No drug or device payments recorded (2025) · (831) 757-4333
Dr. James Dacus, M.D.
Salinas, CA · $366 in drug and device payments (2025) · (831) 758-2100
Dr. James Tyrrell, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 755-8640
Dr. Jaspreet Dhillon, M.D
Salinas, CA · $924 in drug and device payments (2025) · Telehealth · (831) 751-7070
Dr. Jeanne Cabeza, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 755-8640
Dr. Jessica Ramirez, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 759-3257
Dr. Johnny Blanchard
Salinas, CA · $727 in drug and device payments (2025) · (831) 998-8133
Dr. Justine Nghiem, MD
Salinas, CA · $118 in drug and device payments (2025) · (831) 424-1878
Dr. Karen Winn, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 755-0900
Dr. Laura Solorio, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 769-8640
Dr. Leora Tricia Aquino
Salinas, CA · No drug or device payments recorded (2025) · (831) 769-8640
Dr. Linda Smith, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 422-7777
Dr. Mahmoud Nasser, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 757-4333
Dr. Manas Rane, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 751-7070
Dr. Matthew Calzetta
Salinas, CA · No drug or device payments recorded (2025) · Telehealth · (831) 755-4111
Dr. Megan May, M.D.
Salinas, CA · $403 in drug and device payments (2025) · (831) 755-7999
Dr. Melvin Carter, M.D.
Salinas, CA · $18 in drug and device payments (2025) · (831) 757-0444
Dr. Michael Mahig, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 757-4333
Dr. Navneet Adya, MD
Salinas, CA · No drug or device payments recorded (2025) · (831) 449-1515
Dr. Neville Udwadia, M.D.
Salinas, CA · No drug or device payments recorded (2025) · Telehealth · (831) 422-6011
Dr. Norril Sumanqui, MD
Salinas, CA · $34 in drug and device payments (2025) · (831) 422-7777
Dr. Patrick Chen, M.D.
Salinas, CA · $200 in drug and device payments (2025) · Telehealth · (831) 751-7070
Dr. Phillip King, MD
Salinas, CA · $1,190 in drug and device payments (2025) · Telehealth · (831) 751-7070

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.