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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. Lobna Shahatto, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 657-7000
Dr. Lois Lee, DO
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-7220
Dr. Lorena Rojas Gomez, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (800) 926-8273
Dr. Lori Wan, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 496-4800
Dr. Lorraine Eubany, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Lorrie Strohecker, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 563-0507
Dr. Louise Eberhart, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 278-3300
Dr. Lucas Keyt, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Ludmila Gerova, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 414-1540
Dr. Luis Chavez, MD
San Diego, CA · $614 in drug and device payments (2025) · (619) 266-3332
Dr. Luke Irwin, MD
San Diego, CA · No drug or device payments recorded (2025) · (805) 405-9192
Dr. Luke Shenton, MD
San Diego, CA · $20 in drug and device payments (2025) · (231) 629-9825
Dr. Luke Silverman-lloyd, MD, MS
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Luz Alvarez, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Lydia Park
San Diego, CA · No drug or device payments recorded (2025) · (619) 432-7996
Dr. Lynne Champagne, MD
San Diego, CA · $252 in drug and device payments (2025) · Telehealth · (858) 487-1800
Dr. Lynne Milgram, M.D.
San Diego, CA · $2,508 in drug and device payments (2025) · (858) 499-4452
Dr. Ma Christina Ondrade, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Madhusree Singh, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 430-0942
Dr. Maggie Dillione, DO
San Diego, CA · No drug or device payments recorded (2025) · (619) 881-9169
Dr. Maham Awan
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6222
Dr. Mahesh Kumar, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Mahlet Alula, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 245-2810
Dr. Maile Young, MD
San Diego, CA · $88 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Malathy Sriskandarajah, M.D
San Diego, CA · No drug or device payments recorded (2025) · (619) 515-2430
Dr. Malay Myaing Asgarian Nahavandi, MD
San Diego, CA · No drug or device payments recorded (2025) · (800) 290-5000
Dr. Manjulika Woytowitz, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 552-8585
Dr. Marc Gehr, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 294-8111
Dr. Marc Heikens, M.D.
San Diego, CA · $130 in drug and device payments (2025) · (619) 949-3479
Dr. Margaret Mccracken, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 299-2570
Dr. Margaret Mcdermott, MD
San Diego, CA · $303 in drug and device payments (2025) · (619) 294-8111
Dr. Margarita Schneider, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Maria Bautista, M.D.
San Diego, CA · $63 in drug and device payments (2025) · (858) 722-4779
Dr. Maria Lourdes Mara, M.D.
San Diego, CA · $335 in drug and device payments (2025) · (619) 475-5411
Dr. Mariana Salerno, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 286-1426
Dr. Maria Nava, M.D.
San Diego, CA · $270 in drug and device payments (2025) · (562) 618-3763
Dr. Marie Paz Ingham, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Marika Holte, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 764-3150
Dr. Marilyn Carlin, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 764-3150
Dr. Marina Palma Lima, MD
San Diego, CA · $63 in drug and device payments (2025) · (619) 515-2474
Dr. Marisa Magana, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 657-7118
Dr. Marissa Rubio, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 277-0696
Dr. Marissa Steele, M.D.
San Diego, CA · $359 in drug and device payments (2025) · Telehealth · (858) 939-3400
Dr. Mark Bulgarelli, DO
San Diego, CA · No drug or device payments recorded (2025) · (619) 515-2300
Dr. Mark Hendricks, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-9655
Dr. Mark Jabro, M.D.
San Diego, CA · $35,241 in drug and device payments (2025) · Telehealth · (858) 499-2600
Dr. Mark Janowski, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-6300
Dr. Mark Kowalczyk
San Diego, CA · $3,863 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Mark Mosson, M.D.
San Diego, CA · $2,091 in drug and device payments (2025) · Telehealth · (619) 298-1318
Dr. Mark Wiederhold, M.D.
San Diego, CA · $33,200 in drug and device payments (2025) · (858) 642-0267

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.