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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. Sharon Bae, M.D.
Newport Beach, CA · $42 in drug and device payments (2025) · (949) 717-6755
Dr. Shira Miller, M.D.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 531-7311
Dr. Sima Mirhashemi, D.O.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 551-1234
Dr. Sonia Grewal, M.D.
Newport Beach, CA · $62 in drug and device payments (2025) · (949) 548-3177
Dr. Stephen Angel, M.D.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 645-8475
Dr. Steven Dominguez, MD
Newport Beach, CA · No drug or device payments recorded (2025) · (714) 761-3901
Dr. Sumeyra Yucelen, MD
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 791-3001
Dr. Susan Cederstrom, M.D.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 644-3565
Dr. Terra Safer, MD
Newport Beach, CA · No drug or device payments recorded (2025) · Telehealth · (949) 791-3001
Dr. Tommy Lee, MD
Newport Beach, CA · $18 in drug and device payments (2025) · (949) 764-4624
Dr. Vance Cao, M.D.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 764-4624
Dr. William Bruce, MD
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 760-8275
Dr. William Fukuda, M.D.
Newport Beach, CA · $46 in drug and device payments (2025) · Telehealth · (949) 644-3551
Dr. William Klein, MD
Newport Beach, CA · $1,896 in drug and device payments (2025) · (949) 274-8030
Dr. William Thompson, M.D.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 200-7921
Dr. Yazan Abdullah, M.D.
Newport Beach, CA · $1,133 in drug and device payments (2025) · (949) 200-7921
Dr. Zoltan Csuka, MD
Newport Beach, CA · No drug or device payments recorded (2025) · Telehealth · (949) 648-6763
Dr. Babak Gachpaz, M.D.
Newport Coast, CA · No drug or device payments recorded (2025) · (562) 491-9944
Dr. Kevin Ogrady, M.D.
Newport Coast, CA · No drug or device payments recorded (2025) · (949) 715-6815
Dr. Thomas Le, D.O.
Newport Coast, CA · No drug or device payments recorded (2025) · (949) 759-7057
Dr. Eleanor Santiago, MD
N Hollywood, CA · No drug or device payments recorded (2025) · (818) 762-9883
Dr. Eric Pinderski, M.D.
N Hollywood, CA · No drug or device payments recorded (2025) · (818) 755-0391
Dr. Karen Virley, M.D.
N Hollywood, CA · No drug or device payments recorded (2025) · (818) 755-0391
Dr. Roberto Mariano, M.D.
N Hollywood, CA · No drug or device payments recorded (2025) · (818) 655-9902
Dr. Anna Kim, M.D.
Nipomo, CA · No drug or device payments recorded (2025) · (805) 929-2272
Dr. Atipon Kangwanpornsiri, M.D.
Nipomo, CA · $14 in drug and device payments (2025) · (805) 929-3211
Dr. James Sweeney, MD
Nipomo, CA · $754 in drug and device payments (2025) · (805) 929-2272
Dr. Nancy Kitson, MD
Nipomo, CA · No drug or device payments recorded (2025) · (805) 614-5640
Dr. Teeranun Jirajariyavej, M.D.
Nipomo, CA · $41 in drug and device payments (2025) · (805) 929-3211
Dr. Christine Mikhail, M.D.
Norco, CA · $296 in drug and device payments (2025) · (951) 737-8141
Dr. Honesto Pascual, M.D.
Norco, CA · $24 in drug and device payments (2025) · (951) 737-8141
Dr. Imran Malik, MD
Norco, CA · $96 in drug and device payments (2025) · (951) 479-0070
Dr. Joyce Lazarus, M.D.
Norco, CA · $740 in drug and device payments (2025) · Telehealth · (951) 737-8141
Dr. Naty Tolentino, MD
Norco, CA · No drug or device payments recorded (2025) · (951) 737-2683
Dr. Esther Hui, MD
North Highlands, CA · No drug or device payments recorded (2025) · (916) 339-2229
Dr. Farzaneh Mohammadi, M.D.
North Highlands, CA · No drug or device payments recorded (2025) · (916) 454-2345
Dr. Dana Sweeney, D.O.
North Hills, CA · No drug or device payments recorded (2025) · (818) 891-7711
Dr. Daniel Garcia, M.D.
North Hills, CA · $212 in drug and device payments (2025) · (818) 891-7711
Dr. Eian Prohl, MD
North Hills, CA · No drug or device payments recorded (2025) · (818) 891-7711
Dr. Eric Cheng, M.D.
North Hills, CA · No drug or device payments recorded (2025) · (818) 891-7711
Dr. Jitendra Kuckreja
North Hills, CA · No drug or device payments recorded (2025) · (818) 481-2679
Dr. Job Li, MD
North Hills, CA · $65 in drug and device payments (2025) · (818) 895-3100
Dr. Kristina Klara, MD
North Hills, CA · No drug or device payments recorded (2025) · (818) 891-7711
Dr. Lisa Rubenstein, M.D.
North Hills, CA · No drug or device payments recorded (2025) · (818) 895-9449
Dr. Meghana Frenchman, MD
North Hills, CA · $95 in drug and device payments (2025) · (310) 478-3711
Dr. Olivia Arreola-owen, MD
North Hills, CA · No drug or device payments recorded (2025) · (818) 891-7711
Dr. Paul Malabanan, MD
North Hills, CA · $302 in drug and device payments (2025) · (818) 895-3100
Dr. Rumi Cader, MD
North Hills, CA · $279 in drug and device payments (2025) · Telehealth · (818) 897-7711
Dr. Tammy Chuang, MD
North Hills, CA · $150 in drug and device payments (2025) · (818) 891-7711
Dr. Arlet Sarkissian, D.O.
North Hollywood, CA · $85 in drug and device payments (2025) · (818) 487-0040

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.