HealthcareDiscovery.AI / Doctors / California / Internal Medicine

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. Jennifer Yoo, MD
San Jose, CA · $58 in drug and device payments (2025) · (408) 885-5000
Dr. Jenny Liu, D.O.
San Jose, CA · $18 in drug and device payments (2025) · (408) 885-5000
Dr. Jeri Mao, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 972-7000
Dr. Jerry Callaway, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 358-3715
Dr. Jerwin Wu, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 971-1122
Dr. Jessica Nijmeh, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 605-5233
Dr. Jessica Pearce, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Jimmie Mar, D.O.
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 436-3300
Dr. Jimmy Lin, M.D.
San Jose, CA · $1,257 in drug and device payments (2025) · Telehealth · (408) 983-1012
Dr. Jing Xu, MD
San Jose, CA · No drug or device payments recorded (2025) · Telehealth · (408) 972-7000
Dr. Joanna Lin, MD
San Jose, CA · $47 in drug and device payments (2025) · (408) 885-5000
Dr. Joe Morgensen, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 371-9010
Dr. Johan Hong, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. John Kabahit, DO
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. John Lough, MD
San Jose, CA · No drug or device payments recorded (2025) · (510) 579-5964
Dr. John Phan, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Joon Seok Suh, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 559-2011
Dr. Jose Maria Guanzon, MD
San Jose, CA · $1,955 in drug and device payments (2025) · (408) 272-3041
Dr. Joseph Cu, M.D.
San Jose, CA · $3,344 in drug and device payments (2025) · (408) 270-2107
Dr. Josephine Pham, M.D.
San Jose, CA · $1,718 in drug and device payments (2025) · (408) 246-7120
Dr. Jose Reyes, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 929-0606
Dr. Joy Nishime, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 293-5864
Dr. Julia Tong
San Jose, CA · No drug or device payments recorded (2025) · (408) 387-4144
Dr. Julie Chen, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 295-8628
Dr. Kaleem Naasira, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Kalpna Munzni, M.D.
San Jose, CA · $126 in drug and device payments (2025) · (408) 294-1767
Dr. Karan Aletty
San Jose, CA · No drug or device payments recorded (2025) · (408) 547-7842
Dr. Karen Ouyang-shwe, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Kasturi Malaviya, DO
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Kathleen Serventi, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 347-5988
Dr. Kavitha Chidambaram, M.D
San Jose, CA · No drug or device payments recorded (2025) · (408) 445-3400
Dr. Kavitha Moturi, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Kazi Kaokaf, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5105
Dr. Kelly Gu, MD
San Jose, CA · $75 in drug and device payments (2025) · (408) 972-3000
Dr. Kelly Murphy, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (650) 721-2786
Dr. Kent Imai, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5924
Dr. Kevin Ku, D.O.
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-7724
Dr. Kevin Quach, DO
San Jose, CA · No drug or device payments recorded (2025) · (703) 424-4067
Dr. Khanh Tran, MD
San Jose, CA · $121 in drug and device payments (2025) · (408) 281-3889
Dr. Khoa Nguyen, MD
San Jose, CA · $24 in drug and device payments (2025) · Telehealth · (408) 972-7000
Dr. Khusro Shakir
San Jose, CA · No drug or device payments recorded (2025) · (408) 923-8840
Dr. Kimberly Bazar, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Kimberly Pham, DO
San Jose, CA · No drug or device payments recorded (2025) · (408) 674-9457
Dr. Kim Duong
San Jose, CA · No drug or device payments recorded (2025) · (408) 885-5000
Dr. Kim Lee, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 972-7000
Dr. Kim Millman, MD PHD
San Jose, CA · No drug or device payments recorded (2025) · (408) 218-9301
Dr. Kim Nguyen, M.D.
San Jose, CA · No drug or device payments recorded (2025) · (657) 500-0634
Dr. Kolette Brown, MD
San Jose, CA · $100 in drug and device payments (2025) · Telehealth · (408) 503-7600
Dr. Komal Bhatt, MD
San Jose, CA · No drug or device payments recorded (2025) · (408) 259-5000
Dr. Koorosh Shariat, MD FCCP
San Jose, CA · No drug or device payments recorded (2025) · (408) 926-9700

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

Related

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.