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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. Amir Bahreman, M.D.
San Diego, CA · $297 in drug and device payments (2025) · (858) 939-3400
Dr. Ammer Haffar, MD
San Diego, CA · $3,771 in drug and device payments (2025) · (619) 515-2300
Dr. Amy Delellis, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 294-8111
Dr. Amy Kanner
San Diego, CA · No drug or device payments recorded (2025) · (619) 253-4277
Dr. Amy Sitapati, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 657-8000
Dr. Amy Witman, M.D.
San Diego, CA · $15 in drug and device payments (2025) · (858) 724-1313
Dr. Anastasia Khadjinova, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (888) 663-6331
Dr. Andrea Ramsey, MD
San Diego, CA · No drug or device payments recorded (2025) · (800) 926-8273
Dr. Andrew Busby, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Andrew Greenspan, MD
San Diego, CA · No drug or device payments recorded (2025) · (609) 468-9854
Dr. Andrew Heisel, M.D.
San Diego, CA · $197 in drug and device payments (2025) · (858) 499-2616
Dr. Andrew-huy Dang, MD
San Diego, CA · $48 in drug and device payments (2025) · Telehealth · (800) 926-8273
Dr. Andrew Lai, MD
San Diego, CA · $828 in drug and device payments (2025) · Telehealth · (858) 455-9100
Dr. Andrew Phoon, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 279-1212
Dr. Andrew Ping, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-7022
Dr. Andrew Wang, M.D.
San Diego, CA · $161 in drug and device payments (2025) · (858) 499-2704
Dr. Andy Chan, DO
San Diego, CA · No drug or device payments recorded (2025) · (619) 294-8111
Dr. Andy Lee, MD
San Diego, CA · $177 in drug and device payments (2025) · (619) 528-6050
Dr. Aneel Henry, MD
San Diego, CA · $1,567 in drug and device payments (2025) · Telehealth · (858) 554-1212
Dr. Angela Park, DO
San Diego, CA · $19 in drug and device payments (2025) · (858) 939-3400
Dr. Angela Shin, M.D.
San Diego, CA · $57 in drug and device payments (2025) · (619) 528-3728
Dr. Angie Hung Ching, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Anil Keswani, MD
San Diego, CA · $697 in drug and device payments (2025) · (858) 678-7711
Dr. Anirudh Pareek, M.D.
San Diego, CA · $280 in drug and device payments (2025) · (858) 592-2000
Dr. Anita Marlowe, MD
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 528-5000
Dr. Anita Walton, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 279-9676
Dr. Anju Sawal, D.O.
San Diego, CA · No drug or device payments recorded (2025) · (619) 528-5000
Dr. Ankhita Ramdas, M.B.B.S
San Diego, CA · $273 in drug and device payments (2025) · Telehealth · (858) 499-2701
Dr. Anna Helgeson, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 532-6827
Dr. Anna Quan, MD
San Diego, CA · No drug or device payments recorded (2025) · (858) 552-8585
Dr. Anne Stewart, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 298-0256
Dr. Annie Ondracek, MD
San Diego, CA · $24 in drug and device payments (2025) · (619) 515-2300
Dr. Annie Sanque, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 516-7386
Dr. Ann Kuo, M.D.
San Diego, CA · $107 in drug and device payments (2025) · (619) 849-4469
Dr. Anselmo Roldan, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 423-5616
Dr. Anshu Vashishtha, MD
San Diego, CA · No drug or device payments recorded (2025) · (949) 823-9918
Dr. Anthony Fam, M.D.
San Diego, CA · $120 in drug and device payments (2025) · (619) 663-5344
Dr. Aracely Bonilla Navarrete, MD
San Diego, CA · $112 in drug and device payments (2025) · Telehealth · (619) 849-4440
Dr. Arash Shamsinejad Babaki, MD
San Diego, CA · No drug or device payments recorded (2025) · (415) 750-5908
Dr. Archana Laxmisan, MD MA
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (858) 616-2872
Dr. Arianna Heyer, MD, MPH
San Diego, CA · No drug or device payments recorded (2025) · (585) 552-7475
Dr. Arianna Rodriguez
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-2429
Dr. Armando Martinez, MD
San Diego, CA · No drug or device payments recorded (2025) · (619) 543-6222
Dr. Armelia Sani, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 471-9250
Dr. Arneh Babakhani, MD, PHD
San Diego, CA · $316 in drug and device payments (2025) · (619) 878-3232
Dr. Arthi Balu
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 543-6268
Dr. Arthur Cummins, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (619) 260-8455
Dr. Arthur Kingsbury, M.D.
San Diego, CA · No drug or device payments recorded (2025) · Telehealth · (619) 298-2900
Dr. Arthur Lovgren-moritz, M.D.
San Diego, CA · No drug or device payments recorded (2025) · (858) 541-0181
Dr. Arthur Wong, MD
San Diego, CA · No drug or device payments recorded (2025) · (747) 218-8409

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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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.