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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. Fred Veretto, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Friederike Von Lintig, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-3995
Dr. Gabriel Fabella, M.D.
San Diego, CA · $78 in drug and device payments (2025) · (858) 695-1262
Dr. Gabrielle Dukhovny, MD
San Diego, CA · $24 in drug and device payments (2025) · (619) 528-5435
Dr. Gabriel Wagner, M.D.
San Diego, CA · $247 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Ganeev Singh, MD, MBA
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-7220
Dr. Gang Xu, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (626) 405-2681
Dr. Gary Firestein, M.D.
San Diego, CA · $10,927 in drug and device payments (2025) · (858) 822-0480
Dr. Gary Smethers, MD
San Diego, CA · No drug or device payments recorded (2025) · (602) 908-9190
Dr. Gary Woodall, M.D.
San Diego, CA · $199 in drug and device payments (2025) · (619) 260-3456
Dr. Gautam Lalani, MD
San Diego, CA · $1,267 in drug and device payments (2025) · (619) 543-6222
Dr. Gene Yang, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. George Anyaji, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 479-6767
Dr. George Moore Iv, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Gerald Morris, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 605-7888
Dr. Gerard Boss, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 534-8805
Dr. Gerardo Cisneros-seibel, MD
San Diego, CA · $92 in drug and device payments (2025) · Telehealth · (619) 245-2810
Dr. Gilber Naco, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 688-1600
Dr. Glenn Murphy, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 528-5000
Dr. Glenn Silverman, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 499-2777
Dr. Grant Meyer, M.D.
San Diego, CA · $930 in drug and device payments (2025) · Telehealth · (858) 541-0181
Dr. Gregory Babikian, M.D.
San Diego, CA · $744 in drug and device payments (2025) · Telehealth · (858) 764-3100
Dr. Gregory Maynard, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6222
Dr. Haleh Mahdavieh, MD
San Diego, CA · $273 in drug and device payments (2025) · Telehealth · (858) 605-7887
Dr. Hamid Amjadi, DO
San Diego, CA · $50 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Hamid Ghazi, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 528-5000
Dr. Hannah Young, MD
San Diego, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Harshal Mehdi, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 471-9186
Dr. Hatim Husain, MD
San Diego, CA · $402,938 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Haya Najjar
San Diego, CA · No drug or device payments recorded (2025) · (916) 505-2137
Dr. Hector Cardenas, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 819-7227
Dr. Helen Chou, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6268
Dr. Hemangini Desai, M.D
San Diego, CA · $131 in drug and device payments (2025) · (858) 592-0949
Dr. Henry Weaver, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 532-6400
Dr. Hiep Nguyen, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 582-2079
Dr. Hillary Smalley, DO
San Diego, CA · $147 in drug and device payments (2025) · (619) 532-8983
Dr. Hong Huynh, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 400-5236
Dr. Howard Dittrich, M.D
San Diego, CA · No drug or device payments recorded (2025) · (858) 657-8530
Dr. Howard Lesser, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 560-0764
Dr. Howard Lyon, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 994-6558
Dr. Howard Williams, MD
San Diego, CA · $1,846 in drug and device payments (2025) · Telehealth · (619) 298-1318
Dr. Howard Wynne, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 221-9558
Dr. Hui-i Hsieh, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 221-6064
Dr. Huma Paika, MD
San Diego, CA · $27 in drug and device payments (2025) · (858) 499-2616
Dr. Hyunsoo Kim, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Ida Wong-sefidan, M.D.
San Diego, CA · $158 in drug and device payments (2025) · (619) 543-1849
Dr. Igor Gavrilyuk, MD
San Diego, CA · $1,683 in drug and device payments (2025) · (619) 718-9444
Dr. Ikramah Latif
San Diego, CA · No drug or device payments recorded (2025) · (619) 662-4100
Dr. Ildong Kim, M.D.
San Diego, CA · $30 in drug and device payments (2025) · (858) 560-8910
Dr. Ilia Christy, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 764-3000

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.