Surgery in Eureka, California
Data updated monthly · Last refresh September 2026
8 Surgery providers practice in Eureka. Listings are drawn from federal public records and are not endorsements.
Surgery providers in Eureka
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. Daniel Diamond, MDEureka, CA · $9,257 in drug and device payments (2025) ·
(707) 445-8121 Dr. Huy Trieu, M.D.Eureka, CA · $2,682 in drug and device payments (2025) · Telehealth ·
(707) 443-2248 Dr. John Disiere, M.D.Eureka, CA · No drug or device payments recorded (2025) ·
(707) 444-3885 Dr. John Vanspeybroeck, M.D.Eureka, CA · No drug or device payments recorded (2025) ·
(707) 443-2248 Dr. Michael Palmer, M.D.Eureka, CA · $329 in drug and device payments (2025) · Telehealth ·
(707) 445-3660 Dr. Thomas Loncar, M.D.Eureka, CA · No drug or device payments recorded (2025) ·
(707) 442-8500 Dr. Thomas Rydz, M.D.Eureka, CA · No drug or device payments recorded (2025) · Telehealth ·
(707) 445-3660 Common questions
How many Surgery providers are in Eureka, California?There are 8 Surgery providers with active NPI records practicing in Eureka, according to federal NPPES data refreshed monthly.
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 Eureka Surgery across California