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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. Allison Adler, MD.
Santa Clarita, CA · No drug or device payments recorded (2025) · Telehealth · (661) 513-2100
Dr. Amith Subhash, M.D.
Santa Clarita, CA · $26 in drug and device payments (2025) · (661) 291-3449
Dr. Arineh Melkonian, M.D.
Santa Clarita, CA · No drug or device payments recorded (2025) · Telehealth · (661) 253-5851
Dr. Deepak Ravi
Santa Clarita, CA · $4,439 in drug and device payments (2025) · (661) 253-5851
Dr. Devesh Upadhya, MD
Santa Clarita, CA · No drug or device payments recorded (2025) · Telehealth · (661) 253-5851
Dr. Erica Romblom, MD
Santa Clarita, CA · No drug or device payments recorded (2025) · (661) 753-5464
Dr. Hijab Zubairi, M.D.
Santa Clarita, CA · No drug or device payments recorded (2025) · Telehealth · (661) 253-5851
Dr. James De La Flor, M.D.
Santa Clarita, CA · No drug or device payments recorded (2025) · (661) 222-9381
Dr. Jennifer Tang, MD
Santa Clarita, CA · $36 in drug and device payments (2025) · (661) 593-7500
Dr. Jong Lee, M.D.
Santa Clarita, CA · No drug or device payments recorded (2025) · Telehealth · (661) 513-2100
Dr. Lawrence Bernstein, M.D.
Santa Clarita, CA · $27 in drug and device payments (2025) · (661) 513-2100
Dr. Mariam Assaad, M.D.
Santa Clarita, CA · No drug or device payments recorded (2025) · (661) 222-2470
Dr. Sabita Malla, MD
Santa Clarita, CA · $1,272 in drug and device payments (2025) · Telehealth · (661) 799-7007
Dr. Sadwika Reddy, M.D.
Santa Clarita, CA · $1,140 in drug and device payments (2025) · (661) 481-0022
Dr. Sarah Swanson, MD
Santa Clarita, CA · No drug or device payments recorded (2025) · Telehealth · (661) 513-2100
Dr. Anthony Russo, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (650) 483-7703
Dr. Beata Mach, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 458-5610
Dr. Claire Helbig, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-6300
Dr. Daniel Kim, M.D.
Santa Cruz, CA · $2,097 in drug and device payments (2025) · Telehealth · (831) 458-5526
Dr. David Hayward, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-6925
Dr. Dean Walker
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 423-4111
Dr. Delroy Mcfarlane, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 475-1111
Dr. Elizabeth Brennan, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-5511
Dr. Francisco Rhein
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 460-6041
Dr. Holly B Moore, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 458-5610
Dr. Inemesit Newsome, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 475-1111
Dr. James Engelman, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 475-1111
Dr. John Jackson
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-5820
Dr. John Penner
Santa Cruz, CA · No drug or device payments recorded (2025) · (408) 204-6990
Dr. Judith Kelley-macek, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 454-4100
Dr. Karl Johsens, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 425-1279
Dr. Laura Garvin, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 458-5597
Dr. Lindsy Martinez, M.D.
Santa Cruz, CA · $35 in drug and device payments (2025) · Telehealth · (831) 458-5610
Dr. Linh Nguyen, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 454-4100
Dr. Mary Patz, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 458-5597
Dr. Melinda White, DO
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 609-9163
Dr. Michael Shorenstein, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-1002
Dr. Morvarid Ebrahimi, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 475-1111
Dr. Neel Palakurthy, D.O.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 475-1111
Dr. Nicole Sudduth, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 458-5670
Dr. Nikki Martin, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 454-4100
Dr. Nithya Sritharan, M.D
Santa Cruz, CA · $44 in drug and device payments (2025) · Telehealth · (831) 460-7355
Dr. Patrick Sullivan, M.D.
Santa Cruz, CA · $153 in drug and device payments (2025) · (831) 713-5789
Dr. Rashmi Mathew, MD
Santa Cruz, CA · $163 in drug and device payments (2025) · Telehealth · (831) 454-4764
Dr. Rosalind Shorenstein, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-1002
Dr. Sandra Mendel, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 427-3500
Dr. Sarita Lobo
Santa Cruz, CA · No drug or device payments recorded (2025) · (831) 458-5537
Dr. Satish Chandra, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 475-1111
Dr. Timothy W Allari, MD
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 458-5610
Dr. Vidya Nagaraju, M.D.
Santa Cruz, CA · No drug or device payments recorded (2025) · Telehealth · (831) 462-7700

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.