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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. Kourosh Yamouti, MD
San Jose, CA · $123 in drug and device payments (2025) · Telehealth · (408) 366-0595
Dr. Kristine Johnston, DO
San Jose, CA · $23 in drug and device payments (2025) · (408) 259-5000
Dr. Kristin Walsh, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 885-5935
Dr. Krithi Ravindranath, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Kshonija Batchu, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Lakshmi Avula, M.D
San Jose, CA · No drug or device payments recorded (2025) · (510) 862-5379
Dr. Lakshmi Bythadka, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 858-4412
Dr. Lakshmi Esturi, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Lam Do, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 270-0112
Dr. Laurel Jakubowski
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 885-5000
Dr. Lauren Lo, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Lawrence Bonaldi, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 850-5948
Dr. Leah Chan Uto, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5110
Dr. Leah Weinstein, M.D.
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 885-2146
Dr. Leen Awad, M.D.
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 362-4791
Dr. Leon Castaneda, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7412
Dr. Lester Cordes, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Lily Chen, DO
San Jose, CA · $125 in drug and device payments (2025) · (408) 259-5000
Dr. Lily Zhong
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5110
Dr. Lourdes Santos-reyes, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 929-0606
Dr. Lucas Hill, DO
San Jose, CA · No drug or device payments recorded (2025) · (925) 382-8964
Dr. Luhua Cheng, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Lyth Kaileh
San Jose, CA · No drug or device payments recorded (2025) · (408) 278-3003
Dr. Madhur Saxena, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 363-3039
Dr. Maggie Chau, DO
San Jose, CA · $2,123 in drug and device payments (2025) · Telehealth · (408) 923-8098
Dr. Majid Ghorbanpour Saravi, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (718) 618-0401
Dr. Malathi Charlu, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Malcolm Gordon, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Malvika Lall, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7211
Dr. Manjari Aravamuthan, M.D
San Jose, CA · $453 in drug and device payments (2025) · Telehealth · (408) 929-6922
Dr. Maragadham Balu, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 445-3400
Dr. Marcus Chow, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Maria Herenyiova, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Maria Lucinda Esmundo, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 445-3400
Dr. Maria Tiscareno, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Marilyn Wong, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 223-8118
Dr. Marina Dergun, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7412
Dr. Mark Sanders, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 254-6527
Dr. Marlowe Magallanes, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 477-8080
Dr. Maryam Hassanpour, D.O.
San Jose, CA · No drug or device payments recorded (2025) · (408) 826-7679
Dr. Mary Idso, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Masha Nakelchik, M.D.
San Jose, CA · $4,347 in drug and device payments (2025) · Telehealth · (408) 279-8173
Dr. Maureen Morgan, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Mayuri Jagirdar, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 755-3800
Dr. Mercedes Conklin, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Michael Hwa, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Michael Hwang, D.O.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5110
Dr. Michael Martin, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 292-5337
Dr. Michael Matsumoto, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Michael Ngumi, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000

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.