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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. Linda Pham, DO
Temecula, CA · $1,271 in drug and device payments (2025) · (951) 331-2528
Dr. Lindsay Jones, M.D.
Temecula, CA · No drug or device payments recorded (2025) · (951) 331-2200
Dr. Mehdi Kazemi
Temecula, CA · No drug or device payments recorded (2025) · (951) 600-4337
Dr. Michael Basch, M.D.
Temecula, CA · $804 in drug and device payments (2025) · Telehealth · (951) 719-1111
Dr. Michael Hodgkins, M.D.
Temecula, CA · No drug or device payments recorded (2025) · (951) 695-1552
Dr. Michelle Uttaburanont, M.D.
Temecula, CA · $948 in drug and device payments (2025) · Telehealth · (951) 676-4193
Dr. Midhat Lakhani, MD
Temecula, CA · $17 in drug and device payments (2025) · (951) 600-4337
Dr. Mohammad Rahmany, M.D.
Temecula, CA · No drug or device payments recorded (2025) · (951) 699-4511
Dr. Nichele Blosser, DO
Temecula, CA · $309 in drug and device payments (2025) · Telehealth · (951) 676-4193
Dr. Nizar Salek, MD
Temecula, CA · No drug or device payments recorded (2025) · (951) 693-0666
Dr. Osvaldo Lopez, MD
Temecula, CA · $19 in drug and device payments (2025) · (951) 219-9543
Dr. Paul Vuong
Temecula, CA · No drug or device payments recorded (2025) · (951) 600-4337
Dr. Purnima Sharma
Temecula, CA · No drug or device payments recorded (2025) · (951) 600-4337
Dr. Reda Khan, MD
Temecula, CA · No drug or device payments recorded (2025) · (951) 600-4336
Dr. Richard Jin, M.D.
Temecula, CA · $356 in drug and device payments (2025) · Telehealth · (951) 303-8939
Dr. Roy Holeyfield, MD
Temecula, CA · No drug or device payments recorded (2025) · (402) 813-0279
Dr. Ryan Cunningham
Temecula, CA · $508 in drug and device payments (2025) · (951) 331-2200
Dr. Salma Yasin
Temecula, CA · $15 in drug and device payments (2025) · (951) 600-4337
Dr. Sara Alsarray
Temecula, CA · No drug or device payments recorded (2025) · (951) 600-4337
Dr. Shalynn Arrington, DO
Temecula, CA · No drug or device payments recorded (2025) · (951) 600-4337
Dr. Shawn Crowley
Temecula, CA · $19 in drug and device payments (2025) · (951) 600-4337
Dr. Syed Awais Ahmed, MD
Temecula, CA · $206 in drug and device payments (2025) · (951) 750-7888
Dr. Tanya Tran, D.O.
Temecula, CA · No drug or device payments recorded (2025) · (951) 303-2277
Dr. Udoka Ikezuagu, MD
Temecula, CA · No drug or device payments recorded (2025) · (951) 225-9998
Dr. Yogeshwar Chaturvedi, MD
Temecula, CA · No drug or device payments recorded (2025) · (951) 566-6628
Dr. Yuriy Maksymyuk, DO
Temecula, CA · No drug or device payments recorded (2025) · (951) 600-4337
Dr. Howard Young, MD
Temple City, CA · No drug or device payments recorded (2025) · Telehealth · (626) 309-7600
Dr. Hsien Shih, M.D
Temple City, CA · No drug or device payments recorded (2025) · (626) 215-8911
Dr. Joseph Valentine, M.D.
Temple City, CA · No drug or device payments recorded (2025) · (626) 309-7600
Dr. Wai Wai, M.D.
Temple City, CA · $275 in drug and device payments (2025) · Telehealth · (626) 309-7601
Dr. Allen Avedian, M.D.
Templeton, CA · $635 in drug and device payments (2025) · (805) 239-0644
Dr. Anphong Nguyen
Templeton, CA · No drug or device payments recorded (2025) · (805) 434-3500
Dr. Asad Shah, M.D.
Templeton, CA · $27 in drug and device payments (2025) · (805) 550-1148
Dr. Charles Sturgeon, MD
Templeton, CA · No drug or device payments recorded (2025) · (805) 434-0900
Dr. Gregg Ellison, MD
Templeton, CA · No drug or device payments recorded (2025) · Telehealth · (805) 434-1851
Dr. Gretchen Winter, PH.D., D.O.
Templeton, CA · No drug or device payments recorded (2025) · (804) 434-4706
Dr. Julie Fallon, M.D.
Templeton, CA · $193 in drug and device payments (2025) · Telehealth · (805) 434-9900
Dr. Kenneth Shapiro, M.D.
Templeton, CA · No drug or device payments recorded (2025) · (805) 239-1488
Dr. Kevin Colton, MD
Templeton, CA · $152 in drug and device payments (2025) · Telehealth · (805) 434-1851
Dr. Kristine Hunter, MD
Templeton, CA · No drug or device payments recorded (2025) · (805) 226-4106
Dr. Samkit Jain, MD
Templeton, CA · No drug or device payments recorded (2025) · (805) 434-3500
Dr. Shannon Berry, M.D.
Templeton, CA · $264 in drug and device payments (2025) · Telehealth · (805) 434-9900
Dr. Stephen Sigmund, MD
Templeton, CA · $23 in drug and device payments (2025) · (805) 434-0729
Dr. Steven Mcallen, M.D.
Templeton, CA · $613 in drug and device payments (2025) · Telehealth · (805) 434-1166
Dr. Suvarna Choudhari, M.D.
Templeton, CA · $474 in drug and device payments (2025) · Telehealth · (805) 296-7816
Dr. Tiffney Taylor, D.O.
Templeton, CA · $20 in drug and device payments (2025) · Telehealth · (805) 434-0900
Dr. Amit Monga, MD
Thousand Oaks, CA · $1,196 in drug and device payments (2025) · Telehealth · (805) 870-5282
Dr. Ariel Ahl, MD
Thousand Oaks, CA · $35 in drug and device payments (2025) · (805) 852-9229
Dr. Arpna Patel, MD
Thousand Oaks, CA · No drug or device payments recorded (2025) · (805) 418-3500
Dr. Arvin Tunick, M.D.
Thousand Oaks, CA · No drug or device payments recorded (2025) · (805) 498-4078

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.