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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. Jason Sloves, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Javeria Muqtadeer, D.O.
Panorama City, CA · No drug or device payments recorded (2025) · Telehealth · (888) 778-5000
Dr. Jayashree Puvvula, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Jediah Lee, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Jennifer-lourdes Jorge, MD
Panorama City, CA · No drug or device payments recorded (2025) · Telehealth · (818) 375-2000
Dr. Jin Jeon, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Joann Mendoza, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Joan Presby, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. John Gruen, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. John Monroe, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Jonathan Mariano
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Jonathan Scott, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Joselito Babaran, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 895-4900
Dr. Joshua Kiok, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Kastur Vira, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Katherine Bailey
Panorama City, CA · $720 in drug and device payments (2025) · (833) 574-2273
Dr. Katherine Kao, M.D.
Panorama City, CA · No drug or device payments recorded (2025) · Telehealth · (888) 778-5000
Dr. Kenneth Ackerman, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Kenneth Cho, MD
Panorama City, CA · $242 in drug and device payments (2025) · (818) 375-2000
Dr. Kevin Wu, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Lawrence Schneider, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Leon Chan, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Liana Atallah, MD
Panorama City, CA · No drug or device payments recorded (2025) · Telehealth · (833) 574-2273
Dr. Lily Lim, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Lise Schwarz-lauer, MD
Panorama City, CA · $294 in drug and device payments (2025) · Telehealth · (818) 375-2000
Dr. Loren Chen, M.D.
Panorama City, CA · $44 in drug and device payments (2025) · (818) 787-4084
Dr. Lorraine Grace, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Lynnette Tatosyan, MD
Panorama City, CA · $471 in drug and device payments (2025) · (818) 375-2000
Dr. Manjula Vaghjiani, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Margabandhu Ramanathan, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Marian Grecia-labaro, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Marian Limb, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Maribelle Kim, DO
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Maribel Munoz Ordonez, M.D.
Panorama City, CA · No drug or device payments recorded (2025) · (888) 778-5000
Dr. Marylou Dulay, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Matthew Schneiderman, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Michael Flagg, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Michael Powers, M.D., M.P.H.
Panorama City, CA · No drug or device payments recorded (2025) · (614) 397-7489
Dr. Michelle Park, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Mihran Ogaryan, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 669-8885
Dr. Mohammad Khaledy, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2859
Dr. Mojgan Rafaeloff, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Munif Rahal, MD
Panorama City, CA · $17 in drug and device payments (2025) · (818) 375-2000
Dr. Nathan Ho, DO
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Nkemdirim Chukwumerije, MD
Panorama City, CA · $162 in drug and device payments (2025) · (818) 375-2000
Dr. Patrick Dimartini, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Paul Wong, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Peter Laird, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Philip Korsun, DO
Panorama City, CA · No drug or device payments recorded (2025) · (818) 787-2222
Dr. Phuong Nguyen, DO
Panorama City, CA · No drug or device payments recorded (2025) · Telehealth · (833) 574-2273

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.