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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. Joseph Lonergan, M.D.
San Diego, CA · $150 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Joseph Stein, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 296-3800
Dr. Joseph Tannous, M.D.
San Diego, CA · $187 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Jovian Lam, MD
San Diego, CA · $476 in drug and device payments (2025) · Telehealth · (619) 218-3300
Dr. Joyce Hall, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 881-9169
Dr. Joyce Ji, MD
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Joy Ye, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 952-8365
Dr. Judy Jun, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-7220
Dr. Julia Larson, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Julia Lu, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (800) 926-8273
Dr. Juliana Da Silva, MD
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Julie Blockowicz, M.D.
San Diego, CA · $695 in drug and device payments (2025) · Telehealth · (858) 487-1800
Dr. Julie Burgos, DO
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Julie Chu, M.D.
San Diego, CA · $21 in drug and device payments (2025) · (858) 509-1669
Dr. Julie Gollin, M.D.
San Diego, CA · $22 in drug and device payments (2025) · (858) 764-3350
Dr. Julie Phillips, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Julie Willard, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 278-3647
Dr. Julie Winn, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-5227
Dr. Julius Conner, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 499-2600
Dr. Kamron Mirkarimi, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 810-7027
Dr. Karan Patel, DO
San Diego, CA · No drug or device payments recorded (2025) · (858) 312-1440
Dr. Karen Cadman, M.D.
San Diego, CA · $50 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Karen Jamison, M.D.
San Diego, CA · $68 in drug and device payments (2025) · (619) 298-1318
Dr. Karim Mansour, M.D.
San Diego, CA · $350 in drug and device payments (2025) · Telehealth · (858) 868-0820
Dr. Karl Hostetler, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 657-8440
Dr. Karyn Sheline
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Kasper Warrick
San Diego, CA · No drug or device payments recorded (2025) · (715) 563-0686
Dr. Katharine Chiu, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6440
Dr. Katherine Benson, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Katherine Dupas, DO, MS
San Diego, CA · $31 in drug and device payments (2025) · (619) 260-7220
Dr. Katherine Promer, MD
San Diego, CA · $114 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Katherine Urbina, DO
San Diego, CA · $821 in drug and device payments (2025) · Telehealth · (619) 278-3300
Dr. Kathleen Chao, M.D.
San Diego, CA · $38 in drug and device payments (2025) · (619) 532-6460
Dr. Kathleen Wong, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 499-2777
Dr. Kathryn Adams, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 446-1646
Dr. Kathryn Hughes, MD
San Diego, CA · $14 in drug and device payments (2025) · (619) 532-6400
Dr. Katia Suarez Berumen, DO
San Diego, CA · No drug or device payments recorded (2025) · (858) 754-1114
Dr. Kavya Manu, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Kaylan Graham, M.D.
San Diego, CA · $1,500 in drug and device payments (2025) · Telehealth · (858) 764-3150
Dr. Kay Lee, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Keith Sato, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Kelley Hagerich, M.D., MPH
San Diego, CA · No drug or device payments recorded (2025) · (858) 552-8585
Dr. Kelli Liu
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Kelly Torosian, MD
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Kendell Anderson, D.O.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 260-7022
Dr. Kenneth Antons, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (800) 290-5000
Dr. Kenneth Doan, M.D.
San Diego, CA · $19 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Kenneth Roth, M.D.
San Diego, CA · $403 in drug and device payments (2025) · Telehealth · (858) 541-0181
Dr. Kenneth Stevens
San Diego, CA · No drug or device payments recorded (2025) · (503) 998-0614
Dr. Kenny Mai, D.O
San Diego, CA · $59 in drug and device payments (2025) · (858) 779-9919

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.