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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. Michelle Ka Yan Wu, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 887-6714
Dr. Michelle Kerk, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Michelle Tam, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 573-9686
Dr. Miguel Sanchez, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 254-6552
Dr. Milan Vasanji, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-3000
Dr. Milliardaire Syverain, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 294-9234
Dr. Mimsa Islam, MD
San Jose, CA · No drug or device payments recorded (2025) · (530) 407-1890
Dr. Minhchau Nguyen, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5110
Dr. Minh Huynh, M.D.
San Jose, CA · $556 in drug and device payments (2025) · Telehealth · (408) 998-3075
Dr. Minh Le, M.D.
San Jose, CA · $741 in drug and device payments (2025) · (408) 971-1150
Dr. Minh-quan Do
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5110
Dr. Mohammad Valikhani, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 975-2730
Dr. Moneesha Pinto, M.D., M.B.A.
San Jose, CA · $19 in drug and device payments (2025) · (408) 795-3619
Dr. Monica Delzeit, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 363-3000
Dr. Monte Bernstein, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 360-6746
Dr. Nadia Sattar, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 445-4020
Dr. Naheed Malik, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 274-7211
Dr. Namrata Sajwan, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 972-7000
Dr. Nancy Chen, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 889-1216
Dr. Narges Alipanah-lechner, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5110
Dr. Natalia Nemkovich, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 259-5000
Dr. Natasha Ahmed, M.D.
San Jose, CA · $100 in drug and device payments (2025) · Telehealth · (408) 504-3082
Dr. Navreet Dhillon, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Nayanatara Rao, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Nayyar Masood, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 574-9100
Dr. Neha Chandra, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 231-7318
Dr. Nga Pham, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 532-0105
Dr. Nguyen Nguyen, DO
San Jose, CA · $71 in drug and device payments (2025) · (408) 848-8672
Dr. Nguyen Nguyen
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5110
Dr. Nha-ai Nguyen-duc, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 363-3000
Dr. Nhu Chau, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 209-5288
Dr. Nicolas Nguyen, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Nicole Hong Phuong Thai, M.D.
San Jose, CA · $1,095 in drug and device payments (2025) · Telehealth · (408) 928-5656
Dr. Nicole Schneider, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 278-3000
Dr. Nidhi Gupta, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 573-9686
Dr. Nishita Nigam
San Jose, CA · No drug or device payments recorded (2025) · (408) 259-5000
Dr. Nora Ancheta, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 274-2880
Dr. Nour Tlimat, MD
San Jose, CA · $62 in drug and device payments (2025) · (614) 377-5585
Dr. Nutan Poseria, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 278-3003
Dr. Olivia Lee, M.D.
San Jose, CA · $25 in drug and device payments (2025) · (408) 885-5000
Dr. Osama Lam, M.D.
San Jose, CA · $57 in drug and device payments (2025) · Telehealth · (408) 871-3400
Dr. Owen Lum, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 445-3400
Dr. Padmaja Vemula, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 568-5344
Dr. Pantea Mahtosh, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 927-7937
Dr. Peter Mazonson, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 494-7400
Dr. Phuc Dang, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 531-8572
Dr. Piyanka Chandra
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7679
Dr. Poorti Bhandarkar, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Prashanthi Reddy, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Preston Lee, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-3000

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.