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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. Ping Nga Allan Lee, M.D.
Albany, CA · No drug or device payments recorded (2025) · (510) 524-4040
Dr. Richard Murdoch, MD
Albany, CA · No drug or device payments recorded (2025) · (510) 527-6815
Dr. Rong Huang, MD
Albany, CA · $1,013 in drug and device payments (2025) · (510) 524-4040
Dr. Shantha Rao, M.D.
Albany, CA · No drug or device payments recorded (2025) · (510) 724-7247
Dr. Tiffany Baer, M.D.
Albany, CA · No drug or device payments recorded (2025) · (510) 526-5256
Dr. Alexander Chan, MD
Alhambra, CA · $335 in drug and device payments (2025) · Telehealth · (626) 293-1350
Dr. Andrew Fung
Alhambra, CA · $1,714 in drug and device payments (2025) · (626) 281-2232
Dr. Angela Lii, MD
Alhambra, CA · $590 in drug and device payments (2025) · (626) 289-9788
Dr. Bosheng Qiu, M.D
Alhambra, CA · $13,931 in drug and device payments (2025) · (626) 289-3606
Dr. Byron Hsieh-lun Lin, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · (626) 281-1961
Dr. David Gu, D.O.
Alhambra, CA · $743 in drug and device payments (2025) · (626) 282-3999
Dr. Eddie Lam, M.D.
Alhambra, CA · $680 in drug and device payments (2025) · Telehealth · (626) 289-7333
Dr. Edmund Lo, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · (626) 284-2264
Dr. George Christides, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · (626) 282-0282
Dr. Hueyyuan Wu, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · Telehealth · (626) 293-1350
Dr. Inez Cheng, MD
Alhambra, CA · No drug or device payments recorded (2025) · (626) 975-9027
Dr. Jacqueline Wong, M.D.
Alhambra, CA · $522 in drug and device payments (2025) · (626) 281-2232
Dr. James Stewart, M.D.
Alhambra, CA · $1,651 in drug and device payments (2025) · (626) 289-5181
Dr. Janet Chou, D.O.
Alhambra, CA · No drug or device payments recorded (2025) · (626) 300-0008
Dr. Jason Gao
Alhambra, CA · No drug or device payments recorded (2025) · (818) 839-5280
Dr. Jin Hong, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · Telehealth · (626) 282-0282
Dr. Jonathan Wu, DO
Alhambra, CA · No drug or device payments recorded (2025) · Telehealth · (626) 570-8005
Dr. Joyce Chang, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · Telehealth · (626) 570-8005
Dr. Khanh Trieu, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · (858) 212-5755
Dr. Kok-fon Lee, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · Telehealth · (626) 282-0282
Dr. Kuan Su, M.D.
Alhambra, CA · $31 in drug and device payments (2025) · (626) 282-8441
Dr. Leslie Lee, M.D.
Alhambra, CA · $942 in drug and device payments (2025) · Telehealth · (626) 300-0008
Dr. Lichuan Zeng, MD
Alhambra, CA · No drug or device payments recorded (2025) · (626) 570-8005
Dr. Max Chiou, MD
Alhambra, CA · No drug or device payments recorded (2025) · (626) 573-9875
Dr. Maxine Shen, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · (626) 282-6929
Dr. Nan Chen, M.D.
Alhambra, CA · $7,911 in drug and device payments (2025) · (626) 570-1606
Dr. Nora Tee, M.D
Alhambra, CA · $5,911 in drug and device payments (2025) · Telehealth · (626) 282-3657
Dr. Nu Khin, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · (626) 281-7654
Dr. Rania Tamimi, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · (562) 607-5647
Dr. Rashad Wasef, M.D.
Alhambra, CA · $192 in drug and device payments (2025) · (626) 570-6016
Dr. Raymond Cheung, M. D.
Alhambra, CA · $15 in drug and device payments (2025) · (626) 282-8387
Dr. Robert Chan, MD
Alhambra, CA · $370 in drug and device payments (2025) · Telehealth · (626) 576-7871
Dr. Rossana Uranga, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · Telehealth · (626) 293-1351
Dr. Stephen Denq, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · Telehealth · (626) 281-3383
Dr. Steven Do, D.O.
Alhambra, CA · No drug or device payments recorded (2025) · (626) 282-0288
Dr. Thein Htay, M.D.
Alhambra, CA · $1,461 in drug and device payments (2025) · (626) 458-8818
Dr. Thomas Long, MD.
Alhambra, CA · No drug or device payments recorded (2025) · (818) 839-5200
Dr. Tiffany Kao, MD
Alhambra, CA · No drug or device payments recorded (2025) · (626) 282-0282
Dr. Van Hua, M.D.
Alhambra, CA · No drug or device payments recorded (2025) · (626) 757-3459
Dr. Victor Le, M.D.
Alhambra, CA · $25 in drug and device payments (2025) · (714) 612-9309
Dr. Ambika Bhushan
Aliso Viejo, CA · No drug or device payments recorded (2025) · (949) 382-2050
Dr. Angela Miller, D.O.
Aliso Viejo, CA · No drug or device payments recorded (2025) · (949) 831-0300
Dr. Elizabeth Yanni, M.D.
Aliso Viejo, CA · $23 in drug and device payments (2025) · Telehealth · (949) 767-8834
Dr. Hosea Brown, M.D.
Aliso Viejo, CA · No drug or device payments recorded (2025) · (949) 362-8877
Dr. Melanie Zabow, M.D
Aliso Viejo, CA · No drug or device payments recorded (2025) · (949) 425-3248

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.