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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. Pooja Gajjar, DO
Panorama City, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Raymond Lam, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Richard Silverstein, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Ridhika Kapur, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Robert Nosaka, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Robert Shaw, MD
Panorama City, CA · $90 in drug and device payments (2025) · Telehealth · (818) 375-2000
Dr. Robin Larson, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Roderick Spencer, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Sami Alskaf, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Samina Khokhar, M.D.
Panorama City, CA · No drug or device payments recorded (2025) · (888) 777-5000
Dr. Scott Mc Kenzie, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Sharlene Sarathchandra, D.O.
Panorama City, CA · No drug or device payments recorded (2025) · Telehealth · (818) 375-2809
Dr. Shehnaz Habib, M.D.
Panorama City, CA · $1,686 in drug and device payments (2025) · (818) 782-0604
Dr. Sheree Chen, M.D.
Panorama City, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Silvia Compean, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Sohrab Rabbani, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Steven Kwon, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Steve Park, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Stuart Yamada, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Sunita Parikh, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Susannah Mason, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Tarek Ahmed, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Vachik Markarian, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Vijayanti Reddy, MD
Panorama City, CA · $24 in drug and device payments (2025) · Telehealth · (818) 375-2000
Dr. Virginia Ambrosini, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Xian Li, MD
Panorama City, CA · No drug or device payments recorded (2025) · Telehealth · (818) 375-2000
Dr. Yan Shlimak, MD
Panorama City, CA · No drug or device payments recorded (2025) · Telehealth · (818) 375-2000
Dr. Zemmar Lenoir, MD
Panorama City, CA · No drug or device payments recorded (2025) · (818) 375-2000
Dr. Ziad Eskandar, MD
Panorama City, CA · $39 in drug and device payments (2025) · (818) 375-2000
Dr. Axle Maria Rafaelle Untalan, MD
Paradise, CA · $515 in drug and device payments (2025) · (530) 872-2000
Dr. Charles Denman, M.D.
Paradise, CA · $36 in drug and device payments (2025) · (530) 872-2000
Dr. David Damazo, M.D.
Paradise, CA · No drug or device payments recorded (2025) · (530) 877-5433
Dr. Hyung An, M.D.
Paradise, CA · No drug or device payments recorded (2025) · Telehealth · (530) 872-8684
Dr. Kae Aung, M.D.
Paradise, CA · No drug or device payments recorded (2025) · (530) 876-7820
Dr. Peck-houy Ung, M.D.
Paradise, CA · No drug or device payments recorded (2025) · (530) 877-9361
Dr. Sirisha Mahankali, M.D.
Paradise, CA · No drug or device payments recorded (2025) · (530) 877-9361
Dr. Anh Pham, D.O.
Paramount, CA · No drug or device payments recorded (2025) · (562) 602-2334
Dr. Chinedu Ugorji, M.D.
Paramount, CA · No drug or device payments recorded (2025) · (562) 408-0131
Dr. Darius Roohani, MD
Paramount, CA · $33 in drug and device payments (2025) · Telehealth · (213) 761-5686
Dr. Eric Tate, M.D.
Paramount, CA · $358 in drug and device payments (2025) · (562) 531-3133
Dr. Lawrence Cohn, MD
Paramount, CA · No drug or device payments recorded (2025) · (562) 531-9977
Dr. Mark Tsai, M.D.
Paramount, CA · $2,095 in drug and device payments (2025) · (562) 634-6341
Dr. Sergio Trani, M.D.
Paramount, CA · No drug or device payments recorded (2025) · (562) 531-9806
Dr. Josias De Trinidad Castro, M.D.
Parlier, CA · $29 in drug and device payments (2025) · (559) 646-1200
Dr. Albert Kashanian, M.D.
Pasadena, CA · $60 in drug and device payments (2025) · (626) 397-5166
Dr. Alexander Sung
Pasadena, CA · No drug or device payments recorded (2025) · Telehealth · (626) 304-0070
Dr. Ali Daneshvari, MD
Pasadena, CA · $28 in drug and device payments (2025) · (626) 795-2244
Dr. Alisa Yang, MD
Pasadena, CA · No drug or device payments recorded (2025) · (626) 792-2166
Dr. Amish Parikh
Pasadena, CA · $296 in drug and device payments (2025) · (915) 215-8000
Dr. Amy Savagian, M.D.
Pasadena, CA · No drug or device payments recorded (2025) · Telehealth · (626) 872-4195

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.