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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. Hassan Qureshi, DO
Pasadena, CA · $30 in drug and device payments (2025) · (732) 668-5711
Dr. Irina Jasper, MD
Pasadena, CA · $319 in drug and device payments (2025) · (626) 356-0340
Dr. Jacklin Poladian, M.D.
Pasadena, CA · $28 in drug and device payments (2025) · Telehealth · (626) 200-4500
Dr. Jeffrey Denham, M.D.
Pasadena, CA · $870 in drug and device payments (2025) · (626) 793-6113
Dr. Jennifer Li, M.D.
Pasadena, CA · $188 in drug and device payments (2025) · (626) 795-2244
Dr. Joel Lim, D.O.
Pasadena, CA · $150 in drug and device payments (2025) · (626) 795-2244
Dr. John Black
Pasadena, CA · $559 in drug and device payments (2025) · Telehealth · (626) 397-5166
Dr. John Debeixedon, M D
Pasadena, CA · $147 in drug and device payments (2025) · (626) 577-9495
Dr. John Yung, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · (626) 397-5711
Dr. Joseph Dellinger, MD
Pasadena, CA · $14,592 in drug and device payments (2025) · Telehealth · (626) 397-5000
Dr. Joseph Pachorek, M.D.
Pasadena, CA · $1,008 in drug and device payments (2025) · Telehealth · (626) 795-4223
Dr. Joy Weissman, MD
Pasadena, CA · No drug or device payments recorded (2025) · (626) 792-2166
Dr. Julia Salamon, MD
Pasadena, CA · $515 in drug and device payments (2025) · (626) 397-5000
Dr. Justin Levy, MD
Pasadena, CA · $17 in drug and device payments (2025) · (626) 397-5711
Dr. Kada Fehlman, MD
Pasadena, CA · $1,687 in drug and device payments (2025) · (626) 397-5166
Dr. Kenneth Chen
Pasadena, CA · No drug or device payments recorded (2025) · (626) 394-2285
Dr. Kevin Tyson, MD
Pasadena, CA · No drug or device payments recorded (2025) · (626) 798-4952
Dr. Khin Oo, MD
Pasadena, CA · $1,261 in drug and device payments (2025) · (626) 744-9290
Dr. Kristin Karlyn, MD
Pasadena, CA · $114 in drug and device payments (2025) · Telehealth · (626) 734-7870
Dr. Leslie Dudley, MD
Pasadena, CA · $15 in drug and device payments (2025) · Telehealth · (626) 792-3141
Dr. Lillian Ngaw, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · (626) 792-4185
Dr. Linda Hillier, D.O.
Pasadena, CA · $714 in drug and device payments (2025) · Telehealth · (626) 795-4223
Dr. Lori Wynstock, M.D.
Pasadena, CA · $1,383 in drug and device payments (2025) · (626) 793-6113
Dr. Luciano Gomez
Pasadena, CA · $372 in drug and device payments (2025) · Telehealth · (626) 799-4192
Dr. Lucy Lo, M.D.
Pasadena, CA · $250 in drug and device payments (2025) · (626) 795-2244
Dr. Luis Dimen, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · (626) 792-2166
Dr. Lu Jiao, MD
Pasadena, CA · No drug or device payments recorded (2025) · Telehealth · (626) 304-4400
Dr. Lusanik Galustanian, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · (626) 795-2244
Dr. Malathi Narayan, MD
Pasadena, CA · No drug or device payments recorded (2025) · (626) 792-2166
Dr. Marcia Jablon, MD
Pasadena, CA · $117 in drug and device payments (2025) · (626) 792-1912
Dr. Marilynn Moore, MD
Pasadena, CA · No drug or device payments recorded (2025) · Telehealth · (626) 792-3843
Dr. Marina Manvelyan, MD
Pasadena, CA · $1,109 in drug and device payments (2025) · Telehealth · (626) 798-1085
Dr. Mark Hoffman, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · (626) 755-3642
Dr. Matthew Li, MD, MPH
Pasadena, CA · $69 in drug and device payments (2025) · (626) 352-1444
Dr. Michael Gottlieb, MD
Pasadena, CA · $223 in drug and device payments (2025) · (562) 867-7999
Dr. Michele Lefkowitz, MD
Pasadena, CA · No drug or device payments recorded (2025) · (626) 446-4404
Dr. Mindy Tittiger, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · (626) 352-1444
Dr. Ming Chong, MD
Pasadena, CA · No drug or device payments recorded (2025) · (626) 585-4122
Dr. Mona Malakouti
Pasadena, CA · $117 in drug and device payments (2025) · (626) 397-5000
Dr. Muhammad Nasir, M.D.
Pasadena, CA · $62 in drug and device payments (2025) · (626) 798-8976
Dr. Nathan Lewis, MD
Pasadena, CA · $293 in drug and device payments (2025) · (626) 796-8181
Dr. Nga Ha, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · (626) 799-4194
Dr. Paige Mccleary, MD
Pasadena, CA · No drug or device payments recorded (2025) · (626) 795-2244
Dr. Paul Lee, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · Telehealth · (626) 397-5000
Dr. Prabhat Mukerjee, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · (323) 540-4151
Dr. Radha Bhargava-gupta, MD
Pasadena, CA · No drug or device payments recorded (2025) · (626) 405-3147
Dr. Rafael Avakyan, M.D.
Pasadena, CA · $15 in drug and device payments (2025) · Telehealth · (626) 799-4191
Dr. Ralph Jung, MD
Pasadena, CA · No drug or device payments recorded (2025) · (626) 578-0416
Dr. Ricardo Rivas-plata
Pasadena, CA · No drug or device payments recorded (2025) · Telehealth · (626) 585-4120
Dr. Richard Wear, MD
Pasadena, CA · No drug or device payments recorded (2025) · Telehealth · (626) 792-3141

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

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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.