Tweddell, James S.
James S. Tweddell, MD

James S. Tweddell, MD

Chief and Professor of Cardiothoracic Surgery




  • Cardiothoracic Surgery
  • General Surgery
  • Pediatric Cardiothoracic Surgery

Board Certification

  • General Surgery
  • Thoracic Surgery
  • Congenital Cardiac Surgery

Hospital Affiliations

  • Froedtert Hospital

Patient Ages Seen

  • Infant
  • Child
  • Adolescent
  • Adult
  • Senior

Languages Spoken

  • English

Diseases & Conditions

  • Adult Congenital Heart Disease
  • Atrioventricular Canal Defects
  • Coarctation of the Aorta
  • Interrupted Aortic Arch
  • Norwood Procedure and Single Ventricle Palliation
  • Pulmonary Atresia
  • Tetralogy of Fallot
  • Truncus Arteriosus
  • Ventricular and Atrial Septal Defects

Treatments & Services

  • Heart Transplantation
  • Neonatal and Infant Cardiac Surgery
  • Second Opinions
  • Transposition of the Great Vessels


Dr. Tweddell is Chief of Pediatric Cardiothoracic Surgery at Children's Hospital of Wisconsin and is a leader in the field of complex neonatal and pediatric cardiac surgery. He is Director of Cardiothoracic Organ Transplantation at Children's Hospital of Wisconsin and participates in the Cardiothoracic Organ Transplant Program at Froedtert Hospital.

Education / Training
  • Residency - New York University Medical Center - New York City, NY (1985-1987)
  • Doctor of Medicine - University of Cincinnati College of Medicine - OH (1985)
  • Fellowship in Thoracic and Cardiovascular Surgery - Washington University Medical Center - St. Louis, MO (1993)
  • Residency - Washington University Medical Center - St. Louis, MO (1987-1991)
  • Fellowship in Pediatric Thoracic and Cardiovascular Surgery - St. Louis Children's Hospital - MO (1993)
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9200 W. Wisconsin Ave.
Milwaukee, WI 53226