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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. Jennifer Deconde, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 249-5400
Dr. Jennifer Javors, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 552-8585
Dr. Jennifer Park, D.O.
San Diego, CA · $380 in drug and device payments (2025) · Telehealth · (858) 554-7272
Dr. Jennifer Poast, D.O.
San Diego, CA · $18 in drug and device payments (2025) · (619) 563-0507
Dr. Jennifer Sun, D.O.
San Diego, CA · No drug or device payments recorded (2025) · (619) 294-8111
Dr. Jennings Staley, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 552-8585
Dr. Jenny Huang
San Diego, CA · $379 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Jerry Tseng, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 674-2306
Dr. Jessica Hansen
San Diego, CA · $14 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Jessica Lilley, MD
San Diego, CA · $194 in drug and device payments (2025) · (619) 532-6400
Dr. Jessica Wen, PHD, MD
San Diego, CA · $24 in drug and device payments (2025) · (619) 543-6268
Dr. Jesslyn Erlich, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-7220
Dr. Jill Blumenthal, M.D.
San Diego, CA · $13,026 in drug and device payments (2025) · (800) 926-8273
Dr. Joan Bailey, MD
San Diego, CA · $46 in drug and device payments (2025) · (619) 515-2300
Dr. Joan Chung, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 641-4044
Dr. Joanna Gunn, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Joanne Keenan, D.O.
San Diego, CA · $172 in drug and device payments (2025) · (619) 286-8804
Dr. Joel Everson, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Joel Lees, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 532-6287
Dr. Joel Trambley, MD
San Diego, CA · $87 in drug and device payments (2025) · (619) 515-2545
Dr. Joe Ramsdell, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 657-8000
Dr. John Allen Mccutchan, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-8080
Dr. John Chardos, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 552-8585
Dr. John Chau, M.D.
San Diego, CA · $22 in drug and device payments (2025) · (619) 235-4211
Dr. John Clark, MD
San Diego, CA · $1,147 in drug and device payments (2025) · (800) 926-8273
Dr. John Dodge, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 278-3300
Dr. John Ekstrand, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 236-5307
Dr. John Gaidry, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 274-0300
Dr. John Garvie, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-2470
Dr. John Howard, MD
San Diego, CA · No drug or device payments recorded (2025) · (202) 706-0627
Dr. John Lofrese, MD
San Diego, CA · $21 in drug and device payments (2025) · (516) 457-0965
Dr. John Marino, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 229-5075
Dr. John Plander, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 488-9750
Dr. John Rossettie, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. John Turla, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. John Weber, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Jonathan Cho, MD, PHD
San Diego, CA · No drug or device payments recorded (2025) · (619) 437-2860
Dr. Jonathan Escobar, DO
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Jonathan Siegel, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Jonathan Yee, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Jon Harrison, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Jorge Gabela, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 944-3577
Dr. Jose Cesena, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Jose De La Rosa, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 888-1530
Dr. Josefine Wallace, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Jose Marquez, MD
San Diego, CA · $51 in drug and device payments (2025) · (619) 515-2545
Dr. Joseph Boone, DO
San Diego, CA · No drug or device payments recorded (2025) · (619) 881-9169
Dr. Joseph Delly, MD
San Diego, CA · $133 in drug and device payments (2025) · (619) 260-7220
Dr. Joseph Diaz, M.D.
San Diego, CA · $224 in drug and device payments (2025) · Telehealth · (619) 543-6268
Dr. Joseph Hunt, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 661-6500

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.