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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. Matthew Neoh
Carmel, CA · No drug or device payments recorded (2025) · (831) 718-9701
Dr. Roger Newton, M.D.
Carmel, CA · No drug or device payments recorded (2025) · (831) 626-1719
Dr. Walter Holz, MD
Carmel, CA · No drug or device payments recorded (2025) · (831) 624-1864
Dr. Gregory Thompson, M.D.
Carmel Valley, CA · $46 in drug and device payments (2025) · (801) 718-4181
Dr. Aye Tun, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · Telehealth · (916) 537-5079
Dr. Bruce Cohn, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 616-9268
Dr. Caron Houston, MD
Carmichael, CA · $98 in drug and device payments (2025) · (916) 731-7965
Dr. Ching Chou, MD.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 967-2766
Dr. David Olson, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 332-1210
Dr. Edina Torlak, MD
Carmichael, CA · No drug or device payments recorded (2025) · (916) 536-3620
Dr. Edward Fuchs, MD
Carmichael, CA · No drug or device payments recorded (2025) · (916) 768-4443
Dr. Elizabeth Madarang, M.D.
Carmichael, CA · $128 in drug and device payments (2025) · Telehealth · (916) 536-3620
Dr. Hadi Firoz, MD
Carmichael, CA · $1,156 in drug and device payments (2025) · Telehealth · (916) 536-3620
Dr. Harmandeep Dhaliwal, M.D.
Carmichael, CA · $1,158 in drug and device payments (2025) · (916) 500-4510
Dr. Henry Chang, MD
Carmichael, CA · No drug or device payments recorded (2025) · (916) 536-2484
Dr. Hoang Pham, MD
Carmichael, CA · $112 in drug and device payments (2025) · Telehealth · (916) 536-3540
Dr. Howard Homler, M.D.
Carmichael, CA · $270 in drug and device payments (2025) · (916) 330-4447
Dr. Hussam Kujok, MD
Carmichael, CA · $595 in drug and device payments (2025) · Telehealth · (916) 971-9000
Dr. Jack Kraft, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 483-5400
Dr. Jamshid Faraji, M.D.
Carmichael, CA · $122 in drug and device payments (2025) · Telehealth · (916) 965-8161
Dr. Katherine Bisharat, MD
Carmichael, CA · $23 in drug and device payments (2025) · Telehealth · (916) 481-4374
Dr. Lloyd Rich, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 488-3122
Dr. Lou Nishimura, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 967-4030
Dr. Malvika Suri, MD
Carmichael, CA · No drug or device payments recorded (2025) · Telehealth · (916) 536-3540
Dr. Mark Moody, MD
Carmichael, CA · No drug or device payments recorded (2025) · (916) 344-9400
Dr. Nabil Majid, MD
Carmichael, CA · No drug or device payments recorded (2025) · (916) 537-5079
Dr. Nancy Jo Coburn, MD
Carmichael, CA · No drug or device payments recorded (2025) · (916) 332-1210
Dr. Natalia Black, MD
Carmichael, CA · $78 in drug and device payments (2025) · (916) 979-0621
Dr. Nyi Tun, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 537-5079
Dr. Rajan Saini, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 414-9055
Dr. Robert Weston, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 536-3620
Dr. Russell Miller, MD
Carmichael, CA · No drug or device payments recorded (2025) · (916) 344-9400
Dr. Sahana Ramanujam, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 549-1025
Dr. Sukhdev Khangura, MD
Carmichael, CA · No drug or device payments recorded (2025) · Telehealth · (916) 483-5589
Dr. Sunil Dhir, M.D.
Carmichael, CA · $15 in drug and device payments (2025) · Telehealth · (916) 332-1210
Dr. Syed Zaidi, M.D.
Carmichael, CA · $54 in drug and device payments (2025) · (916) 904-3000
Dr. Than Ma, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 537-5079
Dr. Wutt Linn, M.D.
Carmichael, CA · No drug or device payments recorded (2025) · (916) 537-5079
Dr. Stephen Drogin, M.D.
Carmichael, Ca, CA · No drug or device payments recorded (2025) · (916) 843-9196
Dr. Martin Walker, M.D.
Carpinteria, CA · No drug or device payments recorded (2025) · (805) 684-1013
Dr. Rafael Victoria, M.D.
Carpinteria, CA · $45 in drug and device payments (2025) · (805) 566-5080
Dr. Todd Engstrom, MD
Carpinteria, CA · No drug or device payments recorded (2025) · Telehealth · (805) 566-5080
Dr. William Edelstein, M.D.
Carpinteria, CA · No drug or device payments recorded (2025) · (805) 560-1050
Dr. Aparna Akolkar, MD
Carson, CA · No drug or device payments recorded (2025) · (888) 530-4415
Dr. Bijan Ghatan, M.D.
Carson, CA · No drug or device payments recorded (2025) · Telehealth · (310) 327-8877
Dr. Edgardo Osea, M.D.
Carson, CA · No drug or device payments recorded (2025) · Telehealth · (310) 952-8212
Dr. Estrella Aguinaldo, M.D.
Carson, CA · $363 in drug and device payments (2025) · (310) 233-2555
Dr. Eugene Hardin, M.D.
Carson, CA · $14 in drug and device payments (2025) · (310) 518-2737
Dr. Israel Hernandez-arce, MD
Carson, CA · $33 in drug and device payments (2025) · Telehealth · (310) 835-6627
Dr. Krixie Silangcruz, MD, MBA
Carson, CA · $276 in drug and device payments (2025) · Telehealth · (310) 233-3203

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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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.