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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. Michelle Torres, MD
San Mateo, CA · No drug or device payments recorded (2025) · (650) 358-7000
Dr. Mohammed Bailony, M.D.
San Mateo, CA · $412 in drug and device payments (2025) · Telehealth · (650) 319-8654
Dr. Paul Jemelian, MD
San Mateo, CA · No drug or device payments recorded (2025) · Telehealth · (650) 340-6302
Dr. Richard Ehling
San Mateo, CA · No drug or device payments recorded (2025) · (650) 573-2222
Dr. Richard Moore, M.D.
San Mateo, CA · No drug or device payments recorded (2025) · (650) 539-4224
Dr. Shan Gao
San Mateo, CA · No drug or device payments recorded (2025) · (510) 813-8336
Dr. Sukhjit Takhar, MD
San Mateo, CA · $39 in drug and device payments (2025) · (650) 747-6160
Dr. Susan Ehrlich, MD
San Mateo, CA · No drug or device payments recorded (2025) · (650) 573-2222
Dr. Susan Joseph, MD
San Mateo, CA · No drug or device payments recorded (2025) · (650) 573-2222
Dr. Susanne Martin, MD
San Mateo, CA · No drug or device payments recorded (2025) · (650) 696-4158
Dr. Swati Awsare, M.D.
San Mateo, CA · No drug or device payments recorded (2025) · (650) 536-2191
Dr. Terry Farrow, MD
San Mateo, CA · No drug or device payments recorded (2025) · (650) 389-8840
Dr. Thomas Booth, MD
San Mateo, CA · No drug or device payments recorded (2025) · (650) 288-0596
Dr. Timothy Offensend, MD
San Mateo, CA · No drug or device payments recorded (2025) · (650) 347-0063
Dr. Tina Au
San Mateo, CA · No drug or device payments recorded (2025) · (650) 573-3702
Dr. Ulrike Sujansky, MD
San Mateo, CA · No drug or device payments recorded (2025) · Telehealth · (650) 696-4440
Dr. Umesh Gheewala, M.D.
San Mateo, CA · No drug or device payments recorded (2025) · (650) 696-4758
Dr. Victoria Ramirez
San Mateo, CA · No drug or device payments recorded (2025) · (650) 573-2222
Dr. Vijan Joshi, M.D.
San Mateo, CA · No drug or device payments recorded (2025) · Telehealth · (415) 291-0480
Dr. Khosrow Afsari, FACP MD
San Pablo, CA · No drug or device payments recorded (2025) · (510) 232-9065
Dr. Mofiz Haque, M.D.
San Pablo, CA · No drug or device payments recorded (2025) · (510) 235-7000
Dr. Pablo Guevara, M.D.
San Pablo, CA · No drug or device payments recorded (2025) · Telehealth · (510) 237-2802
Dr. Paul Cianci, M.D.
San Pablo, CA · No drug or device payments recorded (2025) · (510) 235-3483
Dr. Ronald Berman, M.D.
San Pablo, CA · $23 in drug and device payments (2025) · Telehealth · (510) 235-1723
Dr. Sarah Krasny, MD
San Pablo, CA · No drug or device payments recorded (2025) · Telehealth · (510) 237-2802
Dr. Tuan Dang, M.D
San Pablo, CA · No drug or device payments recorded (2025) · (510) 970-5140
Dr. William Chen, MD
San Pablo, CA · $949 in drug and device payments (2025) · Telehealth · (510) 235-9247
Dr. Binh Dang, MD
San Pedro, CA · No drug or device payments recorded (2025) · (310) 514-5401
Dr. Christine Chileshe, MD
San Pedro, CA · $40 in drug and device payments (2025) · (310) 548-0201
Dr. Crescenzo Pisano, M.D.
San Pedro, CA · $2,318 in drug and device payments (2025) · Telehealth · (310) 831-9482
Dr. Irina Skokandic, M.D.
San Pedro, CA · No drug or device payments recorded (2025) · (310) 831-1449
Dr. Jasmeet Kaur, DO
San Pedro, CA · No drug or device payments recorded (2025) · Telehealth · (310) 832-4225
Dr. Mona Shah, MD
San Pedro, CA · $746 in drug and device payments (2025) · Telehealth · (310) 548-0201
Dr. Nicol Lippman, M.D.
San Pedro, CA · No drug or device payments recorded (2025) · (310) 832-3331
Dr. Nudrat Usman, M.D.
San Pedro, CA · No drug or device payments recorded (2025) · (310) 462-5922
Dr. Peter Sliskovich, M.D.
San Pedro, CA · No drug or device payments recorded (2025) · (310) 833-2461
Dr. Phyllis Monroe, M.D.
San Pedro, CA · No drug or device payments recorded (2025) · (310) 832-4517
Dr. Reese Isaacson
San Pedro, CA · No drug or device payments recorded (2025) · (310) 547-0202
Dr. Roopa Reddy, M.D.
San Pedro, CA · $2,437 in drug and device payments (2025) · Telehealth · (310) 547-9922
Dr. Siamak Marzban, M.D.
San Pedro, CA · No drug or device payments recorded (2025) · (310) 832-2694
Dr. Stephen Taus, MD
San Pedro, CA · No drug or device payments recorded (2025) · (310) 548-3078
Dr. Uduak Iluore, MD
San Pedro, CA · No drug or device payments recorded (2025) · (310) 547-0202
Dr. Clarene David, M.D.
San Quentin, CA · No drug or device payments recorded (2025) · (415) 454-1460
Dr. Haiyan Ramirez Batlle, M.D.
San Quentin, CA · No drug or device payments recorded (2025) · (415) 454-1460
Dr. Michael Rowe, M.D.
San Quentin, CA · No drug or device payments recorded (2025) · (415) 721-3590
Dr. Renee Kanan, MD
San Quentin, CA · No drug or device payments recorded (2025) · (415) 455-5069
Dr. Alan Kneitel, MD
San Rafael, CA · No drug or device payments recorded (2025) · (415) 444-2000
Dr. Alpana Kharkar, MD
San Rafael, CA · No drug or device payments recorded (2025) · (415) 444-2000
Dr. Amy Liu, MD
San Rafael, CA · No drug or device payments recorded (2025) · (415) 444-2000
Dr. Annette Thorn, MD MPH
San Rafael, CA · No drug or device payments recorded (2025) · (831) 625-9403

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.