HealthcareDiscovery.AI / Doctors / California / Irvine / Internal Medicine

Internal Medicine in Irvine, California

Data updated monthly · Last refresh September 2026

155 Internal Medicine providers practice in Irvine, and 36% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Irvine

Listed alphabetically. 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. William Tsai, M.D.
Irvine, CA · $81 in drug and device payments (2025) · Telehealth · (949) 955-0202
Dr. Xinmiao Yang, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 517-3000
Dr. Yeming Sun, M.D.
Irvine, CA · $125 in drug and device payments (2025) · (949) 552-6788
Dr. Yolanda Zhang, DO
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Yunsan Huang, MD
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (949) 824-8600

Conditions Internal Medicine providers in Irvine, 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 Irvine, California?

There are 155 Internal Medicine providers with active NPI records practicing in Irvine, according to federal NPPES data refreshed monthly.

How many Internal Medicine providers in Irvine received drug or device company payments?

56 of 155 (36%) 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 Irvine treat?

Internal Medicine providers in Irvine 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 records 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.

All specialties in Irvine Internal Medicine across California

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.