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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. Joseph Miletich, M.D.
Westlake Village, CA · No drug or device payments recorded (2025) · (805) 796-8517
Dr. Linda Gerrits, MD
Westlake Village, CA · No drug or device payments recorded (2025) · (805) 494-7710
Dr. Miryam Liberman, M.D.
Westlake Village, CA · $27 in drug and device payments (2025) · (818) 991-7315
Dr. Natalie Abrahamian, M.D.
Westlake Village, CA · No drug or device payments recorded (2025) · Telehealth · (805) 371-1393
Dr. Niti Vaid, DO, FACP
Westlake Village, CA · No drug or device payments recorded (2025) · Telehealth · (818) 707-0290
Dr. Rauz Eshraghi, M.D.
Westlake Village, CA · No drug or device payments recorded (2025) · Telehealth · (805) 496-5153
Dr. Richard Low, MD
Westlake Village, CA · No drug or device payments recorded (2025) · (818) 963-9368
Dr. Robert Yamane, MD
Westlake Village, CA · No drug or device payments recorded (2025) · Telehealth · (805) 371-1393
Dr. Susan Jerian, M.D.
Westlake Village, CA · $58,660 in drug and device payments (2025) · (805) 267-1268
Dr. Thomas Giannulli, MS, MS
Westlake Village, CA · No drug or device payments recorded (2025) · (805) 504-2813
Dr. Edmund Ho, M.D.
West Los Angeles, CA · $1,028 in drug and device payments (2025) · (312) 498-5591
Dr. Andy Ho, M.D.
Westminster, CA · $223 in drug and device payments (2025) · (714) 891-7393
Dr. Anh Thu Tran, MD
Westminster, CA · $2,934 in drug and device payments (2025) · (714) 379-4797
Dr. Anhtuan Nguyen, MD
Westminster, CA · $708 in drug and device payments (2025) · Telehealth · (714) 531-2000
Dr. Aruna Krishnaswamy, M.D.
Westminster, CA · $912 in drug and device payments (2025) · (714) 379-3221
Dr. Chinh Mai, MD
Westminster, CA · $3,803 in drug and device payments (2025) · Telehealth · (714) 839-5898
Dr. Cuong Ngo, MD
Westminster, CA · No drug or device payments recorded (2025) · (714) 899-3498
Dr. Cuong Nguyen, MD
Westminster, CA · No drug or device payments recorded (2025) · (714) 898-9966
Dr. Dao Nguyen, MD
Westminster, CA · $46 in drug and device payments (2025) · (714) 898-9966
Dr. Dat Nguyen, M.D.
Westminster, CA · $338 in drug and device payments (2025) · (714) 531-2548
Dr. Dean Ngo, MD
Westminster, CA · $1,649 in drug and device payments (2025) · Telehealth · (714) 531-0000
Dr. Derek Phan, M.D.
Westminster, CA · $41 in drug and device payments (2025) · (714) 891-7035
Dr. Hai Pham, M.D.
Westminster, CA · $245 in drug and device payments (2025) · (714) 531-8711
Dr. Hieu Tram, MD
Westminster, CA · $3,521 in drug and device payments (2025) · Telehealth · (714) 775-3060
Dr. Hoa Nguyen, M.D
Westminster, CA · $65 in drug and device payments (2025) · (714) 898-9770
Dr. Hong Duong, MD
Westminster, CA · $203 in drug and device payments (2025) · (714) 467-9923
Dr. Huan D Le, MD
Westminster, CA · $47 in drug and device payments (2025) · (714) 775-3066
Dr. Hung Nguyen, MD
Westminster, CA · $1,053 in drug and device payments (2025) · (714) 531-2091
Dr. Joshua Peloquin, DO
Westminster, CA · $91 in drug and device payments (2025) · (714) 379-3221
Dr. Khaled Chan, MD
Westminster, CA · $584 in drug and device payments (2025) · (714) 379-3221
Dr. Khue Vu, MD
Westminster, CA · $1,397 in drug and device payments (2025) · Telehealth · (714) 894-6233
Dr. Loan Ngo, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 892-1313
Dr. Loc Bui, M.D.
Westminster, CA · $507 in drug and device payments (2025) · (714) 897-2623
Dr. Meera Sohail, M.D
Westminster, CA · No drug or device payments recorded (2025) · (714) 916-0952
Dr. Melissa Siew, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 379-3221
Dr. Nhon Tran, M.D
Westminster, CA · No drug or device payments recorded (2025) · (714) 895-8583
Dr. Paul Duong, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 839-7332
Dr. Peter Nguyen-dang, MD
Westminster, CA · $73 in drug and device payments (2025) · (714) 531-2548
Dr. Phuc Nguyen, M.D.
Westminster, CA · $46 in drug and device payments (2025) · Telehealth · (714) 531-8915
Dr. Phuong-chi Phan, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 890-9241
Dr. Rifat Rifat, M.D.
Westminster, CA · No drug or device payments recorded (2025) · Telehealth · (714) 895-7944
Dr. Tan Ngo, M.D.
Westminster, CA · No drug or device payments recorded (2025) · (714) 839-8400
Dr. Thu Thuy Huynh, M.D.
Westminster, CA · $3,195 in drug and device payments (2025) · (714) 775-3066
Dr. Thu Vu, MD
Westminster, CA · $1,602 in drug and device payments (2025) · Telehealth · (714) 894-6233
Dr. Thuy Nguyen, M.D.
Westminster, CA · $60 in drug and device payments (2025) · (714) 775-1628
Dr. Toan Tran, M.D.
Westminster, CA · $1,994 in drug and device payments (2025) · Telehealth · (714) 379-0199
Dr. Trung Ly, MD
Westminster, CA · No drug or device payments recorded (2025) · (714) 531-0230
Dr. Tung Thai
Westminster, CA · No drug or device payments recorded (2025) · (714) 531-4100
Dr. Tu Nguyen, MD
Westminster, CA · $6,580 in drug and device payments (2025) · Telehealth · (714) 531-2091
Dr. Victoria Greblya, MD
Westminster, CA · $924 in drug and device payments (2025) · Telehealth · (714) 379-3221

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.