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. Deborah Taurek, MD
Murrieta, CA · $409 in drug and device payments (2025) · (951) 506-1040
Dr. Debralynne Zickafoose, M.D.
Murrieta, CA · $1,602 in drug and device payments (2025) · Telehealth · (951) 200-4601
Dr. Diane Bui, D.O.
Murrieta, CA · No drug or device payments recorded (2025) · (951) 894-4665
Dr. Donald Kimes, D.O.
Murrieta, CA · No drug or device payments recorded (2025) · (951) 696-7587
Dr. Elie Ghasb, MD
Murrieta, CA · $17 in drug and device payments (2025) · Telehealth · (951) 309-8777
Dr. Ernesto Salas, M.D.
Murrieta, CA · No drug or device payments recorded (2025) · Telehealth · (702) 579-3203
Dr. Heather Pleskow, M.D.
Murrieta, CA · $438 in drug and device payments (2025) · (951) 894-4665
Dr. Jack Dinh, M.D.
Murrieta, CA · $2,152 in drug and device payments (2025) · (609) 519-1105
Dr. Jacqueline Dulanto, MD
Murrieta, CA · No drug or device payments recorded (2025) · (951) 894-4665
Dr. Jason Black, M.D.
Murrieta, CA · $2,880 in drug and device payments (2025) · Telehealth · (951) 677-2252
Dr. Jeffrey Edmunds, D.O., M.S., R.D.
Murrieta, CA · No drug or device payments recorded (2025) · (562) 841-0023
Dr. Jonathan Dinh, M.D.
Murrieta, CA · $184 in drug and device payments (2025) · (951) 894-4665
Dr. Jorge Martinez, M.D.
Murrieta, CA · $4,152 in drug and device payments (2025) · (951) 461-1331
Dr. Kaven Hosseinzadeh
Murrieta, CA · No drug or device payments recorded (2025) · (714) 906-5465
Dr. Kee Eom, M.D.
Murrieta, CA · No drug or device payments recorded (2025) · (626) 831-8844
Dr. Lisa Le, MD
Murrieta, CA · No drug or device payments recorded (2025) · (951) 290-4000
Dr. Mark Mueller, MD
Murrieta, CA · $533 in drug and device payments (2025) · Telehealth · (951) 676-4193
Dr. Martha Nemer Pelliza, M.D.
Murrieta, CA · No drug or device payments recorded (2025) · (951) 587-3739
Dr. Mercedes Ann De Las Alas, M.D.
Murrieta, CA · No drug or device payments recorded (2025) · (951) 894-4665
Dr. Nadiya Dukhnych, MD
Murrieta, CA · No drug or device payments recorded (2025) · (909) 825-7084
Dr. Ozair Qadri, MD
Murrieta, CA · $49 in drug and device payments (2025) · (951) 674-1505
Dr. Rakesh Shishodia, MD
Murrieta, CA · No drug or device payments recorded (2025) · (951) 200-4601
Dr. Richard Reynolds, MD
Murrieta, CA · $278 in drug and device payments (2025) · Telehealth · (951) 698-0440
Dr. Richard Shu, M.D.
Murrieta, CA · $156 in drug and device payments (2025) · (951) 698-4600
Dr. Ryan Tran, M.D.
Murrieta, CA · $15 in drug and device payments (2025) · (951) 894-4665
Dr. Sarah Matthews, DO
Murrieta, CA · $25 in drug and device payments (2025) · (951) 290-4168
Dr. Steven Chong, M.D
Murrieta, CA · $19 in drug and device payments (2025) · (951) 290-6500
Dr. Suzanne Chang, MD
Murrieta, CA · $920 in drug and device payments (2025) · Telehealth · (951) 894-4665
Dr. Thanh Nguyen
Murrieta, CA · $119 in drug and device payments (2025) · (951) 290-4000
Dr. Umme Farwa Haideri, DO
Murrieta, CA · No drug or device payments recorded (2025) · (290) 951-4000
Dr. Victor Nguyen, MD
Murrieta, CA · $1,355 in drug and device payments (2025) · Telehealth · (951) 894-4665
Dr. William Tritch
Murrieta, CA · $32 in drug and device payments (2025) · (951) 894-4665
Dr. Yara Matta, MD
Murrieta, CA · $960 in drug and device payments (2025) · Telehealth · (760) 291-6700
Dr. Abhijit Adhye, M.D.
Napa, CA · $694 in drug and device payments (2025) · Telehealth · (707) 637-4108
Dr. Ali Akhavan, MD
Napa, CA · No drug or device payments recorded (2025) · (707) 253-5000
Dr. Amardeep Sahota, MD
Napa, CA · No drug or device payments recorded (2025) · (707) 253-5000
Dr. Andrea Wong, M.D.
Napa, CA · No drug or device payments recorded (2025) · (707) 258-2500
Dr. Andrew Tzellas, M.D
Napa, CA · No drug or device payments recorded (2025) · (707) 254-1770
Dr. Beth Hartung, M.D.
Napa, CA · No drug or device payments recorded (2025) · (707) 254-1774
Dr. Bruce Spurlock
Napa, CA · No drug or device payments recorded (2025) · (916) 835-0204
Dr. Christina Sitenga-kako, M.D.
Napa, CA · No drug or device payments recorded (2025) · (707) 252-4411
Dr. Daniel Andrews, M.D.
Napa, CA · No drug or device payments recorded (2025) · (707) 257-7752
Dr. Danielle Rebischung, MD
Napa, CA · No drug or device payments recorded (2025) · (707) 253-5000
Dr. Daniel Rios, MD
Napa, CA · No drug or device payments recorded (2025) · (707) 254-1770
Dr. David Jue, MD
Napa, CA · No drug or device payments recorded (2025) · Telehealth · (707) 257-1550
Dr. David Vierra, MD
Napa, CA · No drug or device payments recorded (2025) · (707) 252-4411
Dr. Denise Flaherty, MD
Napa, CA · No drug or device payments recorded (2025) · (707) 258-2500
Dr. Dennis Hawley
Napa, CA · No drug or device payments recorded (2025) · (707) 253-5000
Dr. Diana Devera, D.O.
Napa, CA · No drug or device payments recorded (2025) · (707) 251-1867
Dr. Edward Goldstein, MD
Napa, CA · No drug or device payments recorded (2025) · (707) 253-5000

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.