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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. Marlene Millen, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 471-9250
Dr. Martha Benitez, DO
San Diego, CA · No drug or device payments recorded (2025) · (619) 515-2424
Dr. Martha Strauser, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 692-3977
Dr. Maryam Hekmat, M.D.
San Diego, CA · $2,526 in drug and device payments (2025) · (858) 487-1800
Dr. Maryann Erika Beko, M.D.
San Diego, CA · $413 in drug and device payments (2025) · Telehealth · (619) 245-2350
Dr. Mary Jaramillo, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Mary Kegley, MD
San Diego, CA · No drug or device payments recorded (2025) · (276) 608-1314
Dr. Mary Pikus, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 499-2600
Dr. Mary Vansant
San Diego, CA · No drug or device payments recorded (2025) · (619) 532-6400
Dr. Mary Yoo, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Mateen Trimzi, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-3000
Dr. Matthew Chan
San Diego, CA · $259 in drug and device payments (2025) · (619) 543-6268
Dr. Matthew Dowling, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 400-5050
Dr. Matthew Macfarlane, MD
San Diego, CA · $17 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Matthew Roosevelt, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 952-5091
Dr. Matthew Sisitki, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 552-8585
Dr. Maya Vijayaraghavan, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 906-4623
Dr. Mayra Sanchez, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 678-6538
Dr. Maysam Riadh, MD
San Diego, CA · $41 in drug and device payments (2025) · Telehealth · (619) 294-8111
Dr. Mckenna Wade, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 532-5990
Dr. Meena Saeed, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 939-3400
Dr. Melanie Wiseman, MD
San Diego, CA · $41 in drug and device payments (2025) · (619) 532-6400
Dr. Melinda Wong
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Melissa Nardi, D.O.
San Diego, CA · $45 in drug and device payments (2025) · Telehealth · (619) 924-8111
Dr. Melissa Wong, M.D.
San Diego, CA · $25 in drug and device payments (2025) · Telehealth · (619) 543-6268
Dr. Meredith Barnes, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 347-0976
Dr. Merle Albin, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Merri Finchem, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Michael Devereaux, MD
San Diego, CA · $468 in drug and device payments (2025) · Telehealth · (619) 278-3300
Dr. Michael Duffy, DO
San Diego, CA · $26 in drug and device payments (2025) · (619) 647-5072
Dr. Michael Fangerow, D.O.
San Diego, CA · $319 in drug and device payments (2025) · Telehealth · (858) 554-1212
Dr. Michael Fanning, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 881-9169
Dr. Michael Kao, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 266-8300
Dr. Michael Martin, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 499-2600
Dr. Michael Montazeri, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 471-9199
Dr. Michael Owens, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 231-9300
Dr. Michael Smith, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Michael Sullivan, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 692-3977
Dr. Michael Ziegler, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-5656
Dr. Michelle Boisvert, MD
San Diego, CA · $76 in drug and device payments (2025) · (619) 881-9169
Dr. Michelle Higginson, MD
San Diego, CA · $30 in drug and device payments (2025) · (619) 278-3308
Dr. Michelle Liske, M.D.
San Diego, CA · $674 in drug and device payments (2025) · Telehealth · (858) 356-5600
Dr. Miguel Pena-ruiz, M.D.
San Diego, CA · $124 in drug and device payments (2025) · Telehealth · (619) 662-5013
Dr. Mildred Wessigk, MD
San Diego, CA · No drug or device payments recorded (2025) · (602) 277-5551
Dr. Miles Stanich Md Inc, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-1958
Dr. Milla Kviatkovsky, D.O
San Diego, CA · $2,419 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Mimi Yao, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (800) 926-8273
Dr. Minke Winklerprins, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 688-1600
Dr. Miriam Hakim
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (800) 926-8273
Dr. Mitalie Gupta, MD
San Diego, CA · $138 in drug and device payments (2025) · (858) 939-3400

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.