Internal Medicine in Yankton, South Dakota
Data updated monthly · Last refresh September 2026
13 Internal Medicine providers practice in Yankton. Listings are drawn from federal public records and are not endorsements.
Internal Medicine providers in Yankton
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. Amanda Sedlacek, DOYankton, SD · $298 in drug and device payments (2025) · Telehealth ·
(605) 665-7841 Dr. Beth Mikkelsen, MDYankton, SD · No drug or device payments recorded (2025) ·
(605) 665-7841 Dr. Clarissa Barnes, M.D.Yankton, SD · No drug or device payments recorded (2025) ·
(605) 665-7841 Dr. Daniel Megard, MDYankton, SD · No drug or device payments recorded (2025) ·
(605) 665-7841 Dr. Gregory Erickson, MDYankton, SD · No drug or device payments recorded (2025) ·
(605) 668-8100 Dr. Jay Hubner, MDYankton, SD · No drug or device payments recorded (2025) ·
(605) 665-7841 Dr. Jennifer Fillaus, D.O. Dr. John Frank, MDYankton, SD · No drug or device payments recorded (2025) ·
(605) 665-7841 Dr. Michael Hein, MDYankton, SD · No drug or device payments recorded (2025) ·
(605) 665-7841 Dr. Susan Fanta, MDYankton, SD · $14 in drug and device payments (2025) · Telehealth ·
(605) 665-7841 Dr. Theophilus Bortier, MDYankton, SD · No drug or device payments recorded (2025) ·
(605) 668-8000 Dr. Tyler Hanson, M.D.Yankton, SD · $29 in drug and device payments (2025) · Telehealth ·
(605) 665-7841 Conditions Internal Medicine providers in Yankton, South Dakota 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 Yankton, South Dakota?There are 13 Internal Medicine providers with active NPI records practicing in Yankton, according to federal NPPES data refreshed monthly.
What conditions do Internal Medicine providers in Yankton treat?Internal Medicine providers in Yankton 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 Yankton Internal Medicine across South Dakota