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 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. Christopher Burn, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 321-4121 Dr. Christopher Kwong, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 853-2977 Dr. Christopher Millhouse, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(617) 636-5000 Dr. Corine Cesana, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 493-5000 Dr. Craig Munroe, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 722-9839 Dr. Crystal Smith-spangler, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 321-4121 Dr. Cynthia Hom, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 321-4121 Dr. David Jones, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 384-0986 Dr. David Yao, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 493-5000 Dr. Deirdre StegmanPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 321-4121 Dr. Deyu Wang, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 321-4121 Dr. Douglas Owens, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 852-3343 Dr. Edwin Colloff, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 498-2336 Dr. Elizabeth Greyber, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 736-5211 Dr. Elizabeth Koehler, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-6028 Dr. Elliott Wolfe, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 208-5397 Dr. Emily WoodsPalo Alto, CA · $28 in drug and device payments (2025) ·
(650) 493-5000 Dr. Eric David, MDPalo Alto, CA · $201 in drug and device payments (2025) ·
(650) 391-9740 Dr. Fatima Baig, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 723-4000 Dr. Frank Perlroth, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 329-0440 Dr. Gail Pyle, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 321-4121 Dr. Geoffrey Tso, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 723-4000 Dr. Gordon Gao, M.D., PH.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 493-5000 Dr. Gregory MoonPalo Alto, CA · $23 in drug and device payments (2025) ·
(650) 384-6543 Dr. Gulnar Odera, MDPalo Alto, CA · $43 in drug and device payments (2025) ·
(650) 498-4556 Dr. Hamza AbbasiPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 321-4121 Dr. Haya Rubin, M.D.Palo Alto, CA · $18 in drug and device payments (2025) · Telehealth ·
(650) 934-3689 Dr. Heather Linebarger, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 853-2977 Dr. Heidi SchmidtPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 853-2977 Dr. Henry Lew, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 739-0556 Dr. Hiroyu Hatano, M.D.Palo Alto, CA · No drug or device payments recorded (2025) ·
(650) 850-4111 Dr. Hugo Yang, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 614-3299 Dr. Ian TongPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 493-5000 Dr. Irena Ilic, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 321-4121 Dr. Irene Shih, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 325-6778 Dr. Ivie Okundaye, MDPalo Alto, CA · $110 in drug and device payments (2025) · Telehealth ·
(650) 321-4121 Dr. James Hallenbeck, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 849-0175 Dr. Jason Bae, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 853-2958 Dr. Jay Chan, DOPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 321-4121 Dr. Jay Lee, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 321-4121 Dr. Jean-phillip Okhovat, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 853-2977 Dr. Jeffrey Croke, M.D.Palo Alto, CA · $1,307 in drug and device payments (2025) · Telehealth ·
(650) 329-0440 Dr. Jeffrey Urman, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 329-0797 Dr. Jenna Reisler, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(605) 723-4000 Dr. Jennifer Gillett, MDPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 853-2977 Dr. Jennifer Lee, MDPalo Alto, CA · $125 in drug and device payments (2025) ·
(650) 853-2977 Dr. Jennifer Morales, D.O.Palo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 321-4121 Dr. Jennifer WangPalo Alto, CA · No drug or device payments recorded (2025) · Telehealth ·
(650) 853-2977 Dr. Jessica Davidson, MDPalo Alto, CA · $18 in drug and device payments (2025) ·
(650) 321-4121 Dr. Jessica Zhou, MDPalo Alto, CA · No drug or device payments recorded (2025) ·
(650) 723-6661 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.
- High blood pressure
- Type 2 diabetes
- High cholesterol
- Preventive care
- Chronic disease management
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
