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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. Gershon Hepner
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 383-7474
Dr. Ghassan Khoury, M.D.
Los Angeles, CA · $260 in drug and device payments (2025) · (310) 794-1276
Dr. Gilbert Essilfie, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4892
Dr. Gillian Nelson
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 846-4312
Dr. Glen Huang
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-8373
Dr. Glenn Hatfield, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 977-1138
Dr. Glenn Mejia, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 254-5221
Dr. Gloria Hong, MD
Los Angeles, CA · $583 in drug and device payments (2025) · (424) 522-7100
Dr. Gopal Batra, M.D
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 786-7100
Dr. Grace Hu, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Grace Li, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 865-3823
Dr. Grace Neuman, D.O.
Los Angeles, CA · $91 in drug and device payments (2025) · (323) 908-4200
Dr. Graham Parker
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 409-7556
Dr. Greg Orshansky, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 478-3711
Dr. Gregory Morales, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 857-2000
Dr. Gregory Phillips, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Gregory Roybal, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 780-2216
Dr. Gregory Stone, MD
Los Angeles, CA · $168 in drug and device payments (2025) · (310) 267-7849
Dr. Gregory Taylor, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 442-5100
Dr. Gulnar Avaz, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 857-2000
Dr. Gustavo Alza, MD
Los Angeles, CA · $259 in drug and device payments (2025) · Telehealth · (323) 259-0456
Dr. Gwendolyn Lee, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-7921
Dr. Habibollah Karimi-taleghani, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 936-7525
Dr. Hagop Bezikian, MD
Los Angeles, CA · $495 in drug and device payments (2025) · (323) 664-0013
Dr. Haig Aharonian, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 442-5100
Dr. Hannah Hochman Segal, MD
Los Angeles, CA · $382 in drug and device payments (2025) · (562) 867-7999
Dr. Hannah Obasi
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 409-1000
Dr. Harold Koeffler, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-4609
Dr. Haroutyun Shamamian, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4892
Dr. Harrison Ngo, MD
Los Angeles, CA · $178 in drug and device payments (2025) · (310) 268-3752
Dr. Harry Green, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 474-4024
Dr. Harry Lam, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 226-7556
Dr. Harry Yen, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Harveen Sekhon, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-6232
Dr. Harvey Raskind, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-6301
Dr. Hawkin Woo, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 206-8000
Dr. Hayk Papukhyan, MD
Los Angeles, CA · $104 in drug and device payments (2025) · Telehealth · (213) 413-3000
Dr. Heather Maoz, MD
Los Angeles, CA · $19 in drug and device payments (2025) · (424) 338-8000
Dr. Hector Filizola
Los Angeles, CA · $124 in drug and device payments (2025) · (310) 825-9111
Dr. Hector Luque, D.O.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 268-5060
Dr. Heesoo Jeong, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 387-1541
Dr. Heide Woo, MD
Los Angeles, CA · $107 in drug and device payments (2025) · (310) 206-6923
Dr. Hei Kim, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 480-1251
Dr. Helen Lee, D.O.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 226-7556
Dr. Hengameh Monsef, D.O
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 362-8288
Dr. Henry Lin, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4892
Dr. Herbert Eradat, M.D., M.S.
Los Angeles, CA · $23,357 in drug and device payments (2025) · Telehealth · (310) 825-6301
Dr. Heywan Tesfaye
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-7375
Dr. Hla Moe
Los Angeles, CA · $80 in drug and device payments (2025) · (323) 780-4510
Dr. Hoa Phan, D.O.
Los Angeles, CA · $20 in drug and device payments (2025) · (323) 226-7556

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.