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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. Melvina Nnam
Long Beach, CA · No drug or device payments recorded (2025) · (440) 610-7648
Dr. Michael Doo, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Michael Raya, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 426-3333
Dr. Michael Tehrani, M.D.
Long Beach, CA · $114 in drug and device payments (2025) · Telehealth · (562) 498-2481
Dr. Michael Timonian, MD
Long Beach, CA · $60 in drug and device payments (2025) · (562) 491-9140
Dr. Mina Shakiba, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 933-2000
Dr. Minh Nguyen, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 591-0840
Dr. Mojtaba Sabahi, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 933-5020
Dr. Moti Kashyap, M.D. M.SC
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-5844
Dr. Nasir Khan
Long Beach, CA · No drug or device payments recorded (2025) · (562) 491-9140
Dr. Neeraj Gupta, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (213) 440-1082
Dr. Neill Ramos, M.D.
Long Beach, CA · $51 in drug and device payments (2025) · (562) 491-9045
Dr. Nicolas Kang, MD
Long Beach, CA · $80 in drug and device payments (2025) · (562) 492-9900
Dr. Nima Soltanzad
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Nolan Cordell, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Norbert De Guzman, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 491-9350
Dr. Noushin Khoiny, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 597-8677
Dr. Patricia Maciog, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 938-7129
Dr. Patrick Huong, DO
Long Beach, CA · $34 in drug and device payments (2025) · (562) 491-9140
Dr. Pedro De La Rosa, MD
Long Beach, CA · $243 in drug and device payments (2025) · (562) 377-1111
Dr. Pejman Naghdechi, MD
Long Beach, CA · No drug or device payments recorded (2025) · Telehealth · (562) 491-9000
Dr. Peter Ferrera, M.D.
Long Beach, CA · $588 in drug and device payments (2025) · Telehealth · (562) 495-4952
Dr. Peter Kierstead
Long Beach, CA · No drug or device payments recorded (2025) · (562) 234-4926
Dr. Peter Leidl, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 933-2000
Dr. Pierce Mitchell, MD
Long Beach, CA · $36 in drug and device payments (2025) · (562) 491-9140
Dr. Priscilla Auduong, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Rajveer Joea, D.O.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 491-9140
Dr. Raymond Karam, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 933-2000
Dr. Raymond Lee, M.D.
Long Beach, CA · $69 in drug and device payments (2025) · (562) 426-3333
Dr. Rebecca Yamarik, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 298-0030
Dr. Rhonda Luster, MD
Long Beach, CA · $91 in drug and device payments (2025) · (562) 591-8676
Dr. Richard Im, MD
Long Beach, CA · No drug or device payments recorded (2025) · (951) 515-6765
Dr. Robert Comer, MD
Long Beach, CA · $459 in drug and device payments (2025) · Telehealth · (562) 595-7784
Dr. Robert Kaplan, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Robert Liou, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 346-2222
Dr. Roberto Diaz Del Carpio
Long Beach, CA · No drug or device payments recorded (2025) · (888) 530-4415
Dr. Robin Onishi, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-5629
Dr. Rodolfo Ibarra, MD
Long Beach, CA · $267 in drug and device payments (2025) · (562) 423-0436
Dr. Rolland Jenkins, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 826-8000
Dr. Ronald Bitter, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 595-8549
Dr. Ronaldo Roque, M.D.
Long Beach, CA · $32 in drug and device payments (2025) · (562) 494-8512
Dr. Rozalie Jackson, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 951-1450
Dr. Rubina Husain, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · Telehealth · (562) 481-3500
Dr. Sabrina Harper, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 426-3333
Dr. Sanam Pournaki, MD
Long Beach, CA · No drug or device payments recorded (2025) · (562) 424-8814
Dr. Sanaz Monjazeb, MD
Long Beach, CA · $308 in drug and device payments (2025) · (323) 495-3062
Dr. Sayeed Khan, M.D.
Long Beach, CA · No drug or device payments recorded (2025) · (562) 423-3383
Dr. Scott Geiler, PA-C
Long Beach, CA · $45 in drug and device payments (2025) · (201) 396-9244
Dr. Sepideh Yadollahi, MD
Long Beach, CA · $34 in drug and device payments (2025) · (562) 491-9140
Dr. Serena Organ, DO
Long Beach, CA · No drug or device payments recorded (2025) · (562) 997-2000

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.