HealthcareDiscovery.AI / Doctors / California / Internal Medicine

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. Kevin Diep, DO
San Diego, CA · $151 in drug and device payments (2025) · (619) 260-7125
Dr. Kevin Hirsch, MD
San Diego, CA · $98 in drug and device payments (2025) · (619) 278-3300
Dr. Kevin Kozakowski, DO
San Diego, CA · No drug or device payments recorded (2025) · (253) 310-3457
Dr. Kevin Kwak
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6222
Dr. Kevin Wang, MD
San Diego, CA · $19 in drug and device payments (2025) · (619) 543-6268
Dr. Khalid Abdullah, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-7125
Dr. Khanh Le
San Diego, CA · $540 in drug and device payments (2025) · (619) 543-6268
Dr. Khoa Nguyen, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 541-0181
Dr. Kimberly Chau
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 543-6268
Dr. Kimberly Fernandez, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 770-0472
Dr. Kimberly Maxon, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Kimberly Rivera
San Diego, CA · No drug or device payments recorded (2025) · (619) 532-7475
Dr. Kim Kerr, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 294-3701
Dr. Kim Thomas, DO
San Diego, CA · No drug or device payments recorded (2025) · (858) 484-2800
Dr. Kiran Emory, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Kirsten Starr, M.D.
San Diego, CA · $858 in drug and device payments (2025) · Telehealth · (858) 764-3051
Dr. Konrad Davis, MD
San Diego, CA · $21 in drug and device payments (2025) · Telehealth · (619) 532-6460
Dr. Kosala Samarasinghe, M.D.
San Diego, CA · $684 in drug and device payments (2025) · Telehealth · (619) 278-3340
Dr. Krishen Wadhwani, DO
San Diego, CA · $28 in drug and device payments (2025) · (619) 662-4100
Dr. Kristen Haring, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 245-2810
Dr. Kristen Sanford, D.O.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 499-2600
Dr. Kristina Byers-spencer, MD
San Diego, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Kristin Mangalindan
San Diego, CA · No drug or device payments recorded (2025) · (619) 532-6827
Dr. Kurt Henry, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 674-0111
Dr. Kwi Bulow, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-1899
Dr. Lakshmi Prathipati, M.D.
San Diego, CA · $109 in drug and device payments (2025) · Telehealth · (619) 286-3222
Dr. Lana Bridi, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Laura Bamford, MD
San Diego, CA · $785 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Laura Cooke, MD, MPH
San Diego, CA · No drug or device payments recorded (2025) · (619) 446-1861
Dr. Laura Frassinelli, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 594-5281
Dr. Laura Kim, M.D.
San Diego, CA · $25 in drug and device payments (2025) · (858) 642-3197
Dr. Laura Williams Wayne, MD
San Diego, CA · $914 in drug and device payments (2025) · Telehealth · (619) 610-9790
Dr. Lauren Crowther, MD
San Diego, CA · $190 in drug and device payments (2025) · (619) 543-6268
Dr. Laurie Johnston, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 573-9902
Dr. Lavannya Atri, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 682-0164
Dr. Lawrence Ha, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 881-8169
Dr. Leigh Van Vranken, M.D
San Diego, CA · $327 in drug and device payments (2025) · Telehealth · (858) 605-7180
Dr. Leland Soiefer, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 515-2435
Dr. Leonard Bernstein, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 299-2570
Dr. Leonard Okun, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 565-1300
Dr. Leonid Slavin, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-0000
Dr. Leonie Heyworth, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 624-2811
Dr. Leslie Wells, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 718-9444
Dr. Lester Tsai, MD
San Diego, CA · $385 in drug and device payments (2025) · (619) 543-6268
Dr. Linda Fitts, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Linda Huynh, D.O.
San Diego, CA · No drug or device payments recorded (2025) · (858) 541-0181
Dr. Linda Jue, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Lino Bautista, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Lisa Ellis, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 592-2000
Dr. Lisa Wastila, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 543-6283

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

Related

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.