Thoracic Surgery (Cardiothoracic Vascular Surgery) in Sioux Falls, South Dakota
Data updated monthly · Last refresh September 2026
12 Thoracic Surgery (Cardiothoracic Vascular Surgery) providers practice in Sioux Falls. Listings are drawn from federal public records and are not endorsements.
Thoracic Surgery (Cardiothoracic Vascular Surgery) providers in Sioux Falls
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. Brian Duxbury, DOSioux Falls, SD · $228 in drug and device payments (2025) ·
(605) 977-5000 Dr. David Maziarz, M.D.Sioux Falls, SD · $315 in drug and device payments (2025) ·
(605) 312-2100 Dr. John Grehan, MD PHDSioux Falls, SD · $40,983 in drug and device payments (2025) ·
(605) 312-2100 Dr. Keung Ung, M.D.Sioux Falls, SD · $535 in drug and device payments (2025) ·
(605) 312-2100 Dr. Lewis Ofstein, MDSioux Falls, SD · No drug or device payments recorded (2025) ·
(605) 977-5000 Dr. Luyando KalemboSioux Falls, SD · No drug or device payments recorded (2025) ·
(605) 838-5827 Dr. Marc Schechter, MDSioux Falls, SD · No drug or device payments recorded (2025) ·
(605) 941-1866 Dr. Paul Meyer, MDSioux Falls, SD · $149 in drug and device payments (2025) ·
(605) 977-5000 Dr. Peter Andreone, MDSioux Falls, SD · No drug or device payments recorded (2025) ·
(605) 977-5000 Dr. Steven Feldhaus, M.D.Sioux Falls, SD · No drug or device payments recorded (2025) ·
(605) 977-5000 Dr. Tommy Reynolds, MDSioux Falls, SD · $371 in drug and device payments (2025) ·
(605) 977-5000 Dr. Verlyn Nykamp, M.D.Sioux Falls, SD · No drug or device payments recorded (2025) ·
(605) 312-2100 Common questions
How many Thoracic Surgery (Cardiothoracic Vascular Surgery) providers are in Sioux Falls, South Dakota?There are 12 Thoracic Surgery (Cardiothoracic Vascular Surgery) providers with active NPI records practicing in Sioux Falls, 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 Sioux Falls Thoracic Surgery (Cardiothoracic Vascular Surgery) across South Dakota
