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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. Julia Motherway, M.D.
Tustin, CA · $479 in drug and device payments (2025) · (714) 838-5610
Dr. Kenneth Thaler, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 669-4449
Dr. Kien Tran, MD
Tustin, CA · No drug or device payments recorded (2025) · (832) 287-6252
Dr. Lisa Abdishoo, MD
Tustin, CA · $98 in drug and device payments (2025) · (714) 247-0300
Dr. Loutfi Sakkal, DO
Tustin, CA · $62 in drug and device payments (2025) · (714) 665-9890
Dr. Madonna Nicolai, CFNP
Tustin, CA · No drug or device payments recorded (2025) · (714) 550-9990
Dr. Mark Schafer, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 665-1661
Dr. Misty Rydelski, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 449-4800
Dr. Mohamed Al-sadek, M.D.
Tustin, CA · No drug or device payments recorded (2025) · Telehealth · (949) 335-5656
Dr. Patrick Clarke, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (888) 277-0080
Dr. Pin-hung Hsieh, M.D.
Tustin, CA · $1,474 in drug and device payments (2025) · (714) 573-8200
Dr. Robert Bader, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 247-0300
Dr. Samuel Limbong, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (714) 709-8000
Dr. Stela Kostova-abadjieva, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 665-9890
Dr. Susan Ban, M.D.
Tustin, CA · $103 in drug and device payments (2025) · (714) 838-5610
Dr. Tariq Khan, M.D.
Tustin, CA · $21 in drug and device payments (2025) · Telehealth · (657) 218-9859
Dr. Thomas Hwang, M.D.
Tustin, CA · $464 in drug and device payments (2025) · (714) 838-5610
Dr. Avery Johnson, MD
Twentynine Palms, CA · $25 in drug and device payments (2025) · (760) 830-2190
Dr. Bernard Lemke, M.D., M.A.
Ukiah, CA · No drug or device payments recorded (2025) · (707) 468-8944
Dr. Guy Teran, M.D.
Ukiah, CA · $224 in drug and device payments (2025) · (707) 463-8000
Dr. Iyad Hanna, MD
Ukiah, CA · No drug or device payments recorded (2025) · (707) 463-8028
Dr. Jessica Asirwatham, MD
Ukiah, CA · No drug or device payments recorded (2025) · (707) 466-0001
Dr. Linda Mulligan, M.D.
Ukiah, CA · No drug or device payments recorded (2025) · (707) 468-7700
Dr. Marvin Trotter, MD
Ukiah, CA · No drug or device payments recorded (2025) · (707) 462-7900
Dr. Roger Cheitlin, MD
Ukiah, CA · No drug or device payments recorded (2025) · (707) 462-7900
Dr. Russell Hardy, M.D.
Ukiah, CA · $99 in drug and device payments (2025) · (707) 463-8000
Dr. Sarah Alvord, M.D.
Ukiah, CA · $410 in drug and device payments (2025) · (707) 468-1010
Dr. Ajanta Swarnakar, M.D.
Union City, CA · No drug or device payments recorded (2025) · (510) 454-1000
Dr. Alan Jung, M.D.
Union City, CA · No drug or device payments recorded (2025) · Telehealth · (510) 454-1000
Dr. Amrita Deshpande, M.D.
Union City, CA · No drug or device payments recorded (2025) · Telehealth · (510) 454-1000
Dr. Apolinar Gacote, MD
Union City, CA · No drug or device payments recorded (2025) · (510) 487-1198
Dr. Archana Nair, M.D.,
Union City, CA · No drug or device payments recorded (2025) · (510) 675-4714
Dr. Arnold Berman, M.D.
Union City, CA · No drug or device payments recorded (2025) · (510) 454-1000
Dr. Christina Wu, M.D.
Union City, CA · No drug or device payments recorded (2025) · Telehealth · (510) 454-1000
Dr. Claire Diep, M.D.
Union City, CA · No drug or device payments recorded (2025) · Telehealth · (510) 441-8081
Dr. Cynthia Chin, M.D.
Union City, CA · No drug or device payments recorded (2025) · Telehealth · (510) 454-1000
Dr. Eleanor Anderson-williams, M.D.
Union City, CA · No drug or device payments recorded (2025) · (510) 454-1000
Dr. Elmer Chang, M.D.
Union City, CA · $25 in drug and device payments (2025) · (510) 454-1000
Dr. Emily Kim, M.D.
Union City, CA · $23 in drug and device payments (2025) · (510) 454-1000
Dr. Eric Brondfield, MD
Union City, CA · No drug or device payments recorded (2025) · (510) 784-4000
Dr. Gunnar Salumaa, M.D.
Union City, CA · No drug or device payments recorded (2025) · Telehealth · (510) 454-1000
Dr. Gurbeer Bhatti, M.D.
Union City, CA · $25 in drug and device payments (2025) · (510) 454-1000
Dr. Gurpreet Hazra, M.D.
Union City, CA · No drug or device payments recorded (2025) · (510) 454-1000
Dr. Gurpreet Singh
Union City, CA · No drug or device payments recorded (2025) · (510) 675-4010
Dr. Hanisha Geedipally, MD
Union City, CA · No drug or device payments recorded (2025) · Telehealth · (510) 248-1500
Dr. Jaishree Acharya, M.D.
Union City, CA · No drug or device payments recorded (2025) · (510) 454-1000
Dr. Jayasudha Palavalli, M.D.
Union City, CA · No drug or device payments recorded (2025) · Telehealth · (510) 454-1000
Dr. Jonathan Hall, M.D.
Union City, CA · No drug or device payments recorded (2025) · (510) 454-1000
Dr. Joshua Jordan, MD
Union City, CA · No drug or device payments recorded (2025) · (510) 471-5880
Dr. Juancho Libiran, M.D.
Union City, CA · No drug or device payments recorded (2025) · (510) 454-1000

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.