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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. Henry Hao Nguyen, D.O.
Downey, CA · No drug or device payments recorded (2025) · (800) 823-4040
Dr. Hillary Lansman, D.O.
Downey, CA · No drug or device payments recorded (2025) · (562) 461-4815
Dr. Hung Dinh, D.O.
Downey, CA · $142 in drug and device payments (2025) · (562) 657-9000
Dr. Hyong Kim, M.D.
Downey, CA · $131 in drug and device payments (2025) · (562) 862-3684
Dr. Janet Keller, M.D.
Downey, CA · No drug or device payments recorded (2025) · (800) 823-4040
Dr. Jasbir Bhaika, MD
Downey, CA · No drug or device payments recorded (2025) · (562) 869-1089
Dr. Jasmine Nguyen, DO
Downey, CA · $52 in drug and device payments (2025) · (833) 574-2273
Dr. Jaspreet Dhaliwal, MBBS,MD
Downey, CA · No drug or device payments recorded (2025) · (562) 869-1070
Dr. Jennifer Tan, D.O.
Downey, CA · No drug or device payments recorded (2025) · (310) 804-2196
Dr. John-khoa Do, D.O.
Downey, CA · $352 in drug and device payments (2025) · (562) 862-3684
Dr. John Terence So, MD
Downey, CA · No drug or device payments recorded (2025) · (562) 869-1070
Dr. Jose Anguiano, M.D.
Downey, CA · No drug or device payments recorded (2025) · (562) 862-3684
Dr. Joy Lee
Downey, CA · $29 in drug and device payments (2025) · (833) 574-2273
Dr. Judong Kim, M.D.
Downey, CA · No drug or device payments recorded (2025) · Telehealth · (562) 803-2551
Dr. Julia Kao, M.D.
Downey, CA · $24 in drug and device payments (2025) · (562) 657-9000
Dr. Kalpana Ganesan
Downey, CA · No drug or device payments recorded (2025) · (562) 401-7611
Dr. Kasey Siu, DO
Downey, CA · $34 in drug and device payments (2025) · (562) 904-5000
Dr. Katherine Tuan, M.D.
Downey, CA · No drug or device payments recorded (2025) · (800) 823-4040
Dr. Kevin Tran, M.D.
Downey, CA · $283 in drug and device payments (2025) · (562) 401-7111
Dr. Kim Chong, M.D.
Downey, CA · $117 in drug and device payments (2025) · (800) 823-4040
Dr. Kyaw Khaing Soe, M.D.
Downey, CA · No drug or device payments recorded (2025) · (562) 745-5670
Dr. Kyi San, M.D.
Downey, CA · No drug or device payments recorded (2025) · (562) 861-8999
Dr. Laura Ryan, M.D.
Downey, CA · $1,694 in drug and device payments (2025) · Telehealth · (562) 806-0874
Dr. Leonard Rawson, M.D.
Downey, CA · No drug or device payments recorded (2025) · (562) 319-2085
Dr. Lisa Kerestedjian, M.D.
Downey, CA · No drug or device payments recorded (2025) · (800) 823-4040
Dr. Lorellen Green, MD
Downey, CA · No drug or device payments recorded (2025) · (562) 904-5000
Dr. Mandana Shamsa, MD
Downey, CA · No drug or device payments recorded (2025) · (562) 904-5000
Dr. Mark Adriatico, M.D.
Downey, CA · $230 in drug and device payments (2025) · (562) 869-1070
Dr. Mark Talavera, MD
Downey, CA · No drug or device payments recorded (2025) · (562) 869-4497
Dr. May Kyi, M.D
Downey, CA · No drug or device payments recorded (2025) · (562) 385-7611
Dr. May Nyein, MD
Downey, CA · No drug or device payments recorded (2025) · (562) 401-7611
Dr. Michael Chen, M.D.
Downey, CA · $69 in drug and device payments (2025) · Telehealth · (800) 823-4040
Dr. Mihaela Chelu, M.D.
Downey, CA · No drug or device payments recorded (2025) · (562) 272-3383
Dr. Muhammad Anees, M.D.
Downey, CA · $40 in drug and device payments (2025) · (562) 869-1070
Dr. Nageswari Krishnareddy, MD
Downey, CA · No drug or device payments recorded (2025) · (562) 803-0124
Dr. Narayana Gunda, M.D.
Downey, CA · $150 in drug and device payments (2025) · (562) 869-1070
Dr. Nathan Lim
Downey, CA · $17 in drug and device payments (2025) · (562) 904-4466
Dr. Nazar Al-bussam, MD
Downey, CA · No drug or device payments recorded (2025) · (562) 861-8853
Dr. Neal Godwin
Downey, CA · No drug or device payments recorded (2025) · (562) 904-5000
Dr. Nicole Cervantes, M.D.
Downey, CA · $28 in drug and device payments (2025) · (562) 867-7999
Dr. Nikki Park, M.D.
Downey, CA · No drug or device payments recorded (2025) · (562) 657-2812
Dr. Noa Sakamoto, MD
Downey, CA · No drug or device payments recorded (2025) · (800) 823-4040
Dr. Pallavi Kasukurthi
Downey, CA · No drug or device payments recorded (2025) · (562) 869-1070
Dr. Paul Gallardo, MD
Downey, CA · No drug or device payments recorded (2025) · (323) 726-0533
Dr. Prasad Chode, MD
Downey, CA · $63 in drug and device payments (2025) · (562) 319-2085
Dr. Raj Balasundaram, M.D.
Downey, CA · No drug or device payments recorded (2025) · (562) 869-1070
Dr. Rashmi Desai, M.D.
Downey, CA · No drug or device payments recorded (2025) · (562) 803-0124
Dr. Renuka Patel, M.D.
Downey, CA · $72 in drug and device payments (2025) · Telehealth · (562) 923-4911
Dr. Reuven Kimmerling, M.D.
Downey, CA · No drug or device payments recorded (2025) · Telehealth · (562) 461-3000
Dr. Reza Sharafi, M.D.
Downey, CA · $168 in drug and device payments (2025) · Telehealth · (562) 922-2020

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.