Program Administrators

Thavam ThambiThav Thambi-Pillai, M.D., F.A.C.S., Program Director








Amber JohnsonAmber Johnson, C-TAGME, Program Coordinator
Amber.Johnson@SanfordHealth.org

605-357-1391




Melissa Johnson, M.D., F.A.C.S., Associate Program Directo
Luke Serck, M.D., Site Director

Surgical Associates

George Angelos, M.D., F.A.C.S.
Colorectal and Robotic Surgery

Paul Bjordahl, M.D., F.A.C.S., Trauma Director
EGS/General and Surgical Critical Care

Paula Denevan, M.D., F.A.C.S., GS-I Key Faculty
General/Breast/Endocrine Surgery

Jesse Dirksen, M.D., F.A.C.S.
Breast Surgery

Dennis Glatt, M.D., F.A.C.S.
General and Bariatric Surgery

Jenny Guido, M.D. , F.A.C.S., GS-II Key Faculty
EGS and Surgical Critical Care

Jason Knudtson, M.D., F.A.C.S. SICU Key Faculty
EGS and Surgical Critical Care

Curtis Peery, M.D., F.A.C.S. 
General, Bariatric and Robotic Surgery

Matthew Sorrell, M.D., F.A.C.S., EGS Key Faculty
EGS/General and Surgical Critical Care

Thav Thambi-Pillai, M.D., F.A.C.S.
General/Emergency General Surgery (EGS), Renal Transplant/HPB Surgery

Gary Timmerman, M.D., F.A.C.S., Chair
Endocrine/Foregut Surgery

Matthew Tschetter, M.D., F.A.C.S.
General/EGS and Colorectal Surgery

VA: General Surgery and Endoscopy

Andrew Chontos., M.D.
Stephanie Hung, M.D. F.A.C.S.
Melissa Johnson, M.D., F.A.C.S., APD/Site Director
Brian Landsverk, M.D., Advanced GI
Tim Ridgway, M.D., Advanced GI

For additional VA provider information, please visit accesstocare.va.gov.

Yankton: Rural Rotation

Ryan Garry, M.D. F.A.C.S.
Jesse Kampshoff, M.D.
Luke Serck, M.D., Yankton Site Director

Pediatric Surgery

Adam Gorra, M.D., F.A.C.S.
Jon Ryckman, M.D., F.A.C.S.

Vascular Surgery 

Patrick Kelly, M.D., F.A.C.S.
Gregory Nissen, M.D.
Angelo Santos, M.D., F.A.C.S.
Gregory Schulz, M.D.

Thoracic Surgery

Verlyn Nykamp, M.D., F.A.C.S. 
Octavio Pajaro, M.D. 
Keung Ung, M.D., F.A.C.S.

Head and Neck Surgery

Changxing Liu, M.D.
Chad Spanos, M.D., F.A.C.S.

Plastic Surgery

Heather Karu, M.D.
Hoan Nguyen, M.D.