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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. Sai Patteri, MD
Sunnyvale, CA · No drug or device payments recorded (2025) · (346) 481-7964
Dr. Seema Sangwan, M.D.
Sunnyvale, CA · $452 in drug and device payments (2025) · Telehealth · (408) 900-8077
Dr. Sneha Bhamre, MD, MPH
Sunnyvale, CA · No drug or device payments recorded (2025) · Telehealth · (408) 730-4360
Dr. Subrina Sattar, M.D.
Sunnyvale, CA · No drug or device payments recorded (2025) · Telehealth · (888) 663-6331
Dr. Su-may Lee, MD
Sunnyvale, CA · No drug or device payments recorded (2025) · (408) 520-4510
Dr. Surekha Vetsa, M.D
Sunnyvale, CA · $42 in drug and device payments (2025) · Telehealth · (650) 888-1917
Dr. Syed Salman Ali, MD
Sunnyvale, CA · $131 in drug and device payments (2025) · Telehealth · (408) 730-4360
Dr. Tan Nguyen, MD
Sunnyvale, CA · No drug or device payments recorded (2025) · Telehealth · (408) 730-4360
Dr. Teresa Cheng, MD
Sunnyvale, CA · No drug or device payments recorded (2025) · Telehealth · (408) 730-4360
Dr. Van Ong, D.O.
Sunnyvale, CA · No drug or device payments recorded (2025) · Telehealth · (408) 730-4360
Dr. Zubia Ahmad, MD
Sunnyvale, CA · No drug or device payments recorded (2025) · (408) 730-4360
Dr. Chris Burkhart, M.D.
Sunol, CA · No drug or device payments recorded (2025) · (925) 200-5076
Dr. Abdul Ahmady, M.D.
Sun Valley, CA · No drug or device payments recorded (2025) · (818) 768-3000
Dr. Alejandro Rana Custodio, MD, MS
Sun Valley, CA · $131 in drug and device payments (2025) · Telehealth · (818) 768-3000
Dr. Alejandro Villafranca Pascua, M.D.
Sun Valley, CA · $221 in drug and device payments (2025) · Telehealth · (818) 768-3000
Dr. Carlos Vaquero, M.D.
Sun Valley, CA · $16 in drug and device payments (2025) · Telehealth · (818) 768-3000
Dr. Fidel Lara, M.D.
Sun Valley, CA · $6,300 in drug and device payments (2025) · (818) 767-1001
Dr. Jose Prieto Jordan, MD
Sun Valley, CA · No drug or device payments recorded (2025) · (818) 504-4516
Dr. Roberto Guerrero, MD
Sun Valley, CA · $254 in drug and device payments (2025) · Telehealth · (818) 768-3000
Dr. David Snell, M.D.
Susanville, CA · No drug or device payments recorded (2025) · (530) 251-5100
Dr. Fuad Kuliyev
Susanville, CA · $228 in drug and device payments (2025) · (530) 252-2000
Dr. Granville Marshall, M.D.
Susanville, CA · No drug or device payments recorded (2025) · (530) 313-5529
Dr. Sukhbir Pannu, MD
Susanville, CA · No drug or device payments recorded (2025) · (530) 252-2000
Dr. Rita Kerr, M.D.
Sutter Creek, CA · No drug or device payments recorded (2025) · (209) 223-6407
Dr. Albert Park, M.D.
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3205
Dr. Alexandra Orchard, MD, PHD
Sylmar, CA · No drug or device payments recorded (2025) · (747) 210-3205
Dr. Alisa Bekker-nemirovsky, M.D.
Sylmar, CA · No drug or device payments recorded (2025) · Telehealth · (818) 364-3205
Dr. Amir Parvinchiha, MD
Sylmar, CA · $402 in drug and device payments (2025) · (818) 362-1758
Dr. Andrea Cooperman, MD
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3632
Dr. Ardeshir Rahimi, MD
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-1555
Dr. Armeen Mehrabani, MD
Sylmar, CA · $342 in drug and device payments (2025) · (520) 977-3259
Dr. Artin Krekory Ohanian, MD
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3205
Dr. Basem Fanous, MD
Sylmar, CA · No drug or device payments recorded (2025) · Telehealth · (818) 367-1012
Dr. Brian Van Den Burg, M.D.
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3205
Dr. Carlin Rooke, M.D.
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3030
Dr. Charissa So, M.D.
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3205
Dr. Charlene Oh, MD
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3205
Dr. Claudia Cabrera
Sylmar, CA · No drug or device payments recorded (2025) · (747) 210-3205
Dr. Courtney Reynolds, MD, PHD
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3205
Dr. Diana Sarkisyan, M.D.
Sylmar, CA · No drug or device payments recorded (2025) · Telehealth · (818) 364-3205
Dr. Eileen Mccann Wang
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3205
Dr. Elizabeth Arnold, MD
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3205
Dr. Elizabeth Batiuk, MD
Sylmar, CA · $121 in drug and device payments (2025) · (747) 210-3205
Dr. Elizabeth Canales
Sylmar, CA · No drug or device payments recorded (2025) · (818) 364-3205
Dr. Elizabeth Manios, M.D.
Sylmar, CA · No drug or device payments recorded (2025) · Telehealth · (818) 364-3205
Dr. Elysia Engelage, M.D.
Sylmar, CA · No drug or device payments recorded (2025) · Telehealth · (818) 364-3205
Dr. Emil Heinze, MD
Sylmar, CA · $637 in drug and device payments (2025) · (818) 364-3205
Dr. Emmanuel Aguilar-posada
Sylmar, CA · No drug or device payments recorded (2025) · (747) 210-3000
Dr. Erica Bass, MD
Sylmar, CA · No drug or device payments recorded (2025) · (747) 210-3000
Dr. Erika-lizett Wilkins Y Martinez, MD, MPH
Sylmar, CA · No drug or device payments recorded (2025) · (717) 210-3000

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.