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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. Katherine Nguyen
West Hills, CA · $122 in drug and device payments (2025) · (818) 481-0118
Dr. Marc Lavin, M.D.
West Hills, CA · $632 in drug and device payments (2025) · (818) 676-4805
Dr. Maryam Mortezaiefard, D.O.
West Hills, CA · $292 in drug and device payments (2025) · (818) 888-8042
Dr. Mina Mortezai, D.O.
West Hills, CA · $99 in drug and device payments (2025) · (818) 888-8042
Dr. Mohammed Iqbal, MD
West Hills, CA · $464 in drug and device payments (2025) · Telehealth · (818) 347-2921
Dr. Narsis Moshfeghi, MD
West Hills, CA · No drug or device payments recorded (2025) · Telehealth · (818) 703-7027
Dr. Paul Diehl, M.D.
West Hills, CA · $305 in drug and device payments (2025) · Telehealth · (818) 347-1500
Dr. Payum Abdarbashi, MD
West Hills, CA · No drug or device payments recorded (2025) · (323) 306-0114
Dr. Robert Hanson, M.D.
West Hills, CA · No drug or device payments recorded (2025) · (818) 225-1617
Dr. Shahab Attarchi, MD
West Hills, CA · No drug or device payments recorded (2025) · (818) 888-7090
Dr. Soodeh Nili, M.D
West Hills, CA · $398 in drug and device payments (2025) · Telehealth · (818) 347-2921
Dr. Warren Churg, M.D.
West Hills, CA · No drug or device payments recorded (2025) · (818) 522-7551
Dr. Aaron Thomas, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-2924
Dr. Aldon Li, M.D.
West Hollywood, CA · $248 in drug and device payments (2025) · (310) 423-3277
Dr. Alejandro Sarabia Gonzalez
West Hollywood, CA · No drug or device payments recorded (2025) · (915) 244-0698
Dr. Alexander Lee, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-6325
Dr. Alexandra Palma, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (909) 962-1260
Dr. Alex Tang
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5161
Dr. Alex Wessel, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5161
Dr. Amanda Ewing, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-4683
Dr. Amara Seng, MD, PHD
West Hollywood, CA · $245 in drug and device payments (2025) · (310) 248-8522
Dr. Amisha Patel, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-3277
Dr. Andrea Censullo, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5518
Dr. Andrew Ho, M.D.
West Hollywood, CA · $144 in drug and device payments (2025) · Telehealth · (310) 423-5161
Dr. Andrew Lee, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (213) 529-6229
Dr. Anthony Mills, MD
West Hollywood, CA · $365 in drug and device payments (2025) · (310) 550-1010
Dr. Arianna Houriani
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 388-6798
Dr. Armand Rostamian, M.D.
West Hollywood, CA · $3,518 in drug and device payments (2025) · Telehealth · (310) 423-3277
Dr. Arnold Shvarts, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (323) 882-6989
Dr. Ashley Stratton, DO
West Hollywood, CA · $23 in drug and device payments (2025) · (888) 663-6331
Dr. Atikun Limsukon, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-1835
Dr. Barney Soskin
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5252
Dr. Bhavesh Ramani, M.D.
West Hollywood, CA · $354 in drug and device payments (2025) · (310) 423-3277
Dr. Billy Lin
West Hollywood, CA · $851 in drug and device payments (2025) · (310) 423-2811
Dr. Brandon Schwartz
West Hollywood, CA · $2,505 in drug and device payments (2025) · (310) 423-2811
Dr. Brian Huang, M.D.
West Hollywood, CA · $444 in drug and device payments (2025) · (310) 423-9964
Dr. Calvin Lam, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5161
Dr. Cam Tu Nguyen, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5581
Dr. Cara Quant, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5161
Dr. Carolyn Krieg, D.O.
West Hollywood, CA · No drug or device payments recorded (2025) · (925) 818-9432
Dr. Casey Kaneshiro, M.D.
West Hollywood, CA · $99 in drug and device payments (2025) · (310) 423-3277
Dr. Daniel Chiou
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5000
Dr. Daniel Ling, M.D., M.B.A.
West Hollywood, CA · $28 in drug and device payments (2025) · Telehealth · (310) 786-7204
Dr. David Alajajian, MD
West Hollywood, CA · $2,370 in drug and device payments (2025) · (323) 988-1400
Dr. David Gelman, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (917) 519-0576
Dr. David Lalezari, MD
West Hollywood, CA · $570 in drug and device payments (2025) · Telehealth · (323) 765-1500
Dr. David Phak, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-4683
Dr. David Shia, MD, PHD
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5161
Dr. Daya Raman, MD
West Hollywood, CA · No drug or device payments recorded (2025) · (323) 866-8600
Dr. Denise Wang, M.D.
West Hollywood, CA · No drug or device payments recorded (2025) · (310) 423-5252

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.