Katherine T Flynn O'Brien, MD

Pediatric Surgery, Surgery
Children’s Wisconsin since 2018
  • Pediatric Surgeon, Children's Wisconsin




Dr. Flynn-O'Brien's singular focus is excellent patient care, and she will treat your child like her own — with respect, empathy, and compassion. She takes a thoughtful and data-driven approach, with particular emphasis on current best practices. She prioritizes listening and communication to ensure patients and families understand the condition and treatment plan and are actively involved in shared decision making. She places great value in multi-disciplinary care, and prefers minimally invasive approaches whenever safe and feasible. An accomplished surgeon scientist, Dr. Flynn-O'Brien trained in general surgery at the University of Washington in Seattle, where she also obtained her Master's of Public Health in epidemiology. She completed her training in general pediatric surgery at Children's Wisconsin, where she is the Associate Trauma Medical Director of the Level I pediatric trauma program. She has a clinical and research focus on pediatric injury (in particular, pediatric trauma, injury prevention, and outcomes after injury), and is core faculty at the Compressive Injury Center, faculty in the Institute for Health and Equity, and a member of the Milwaukee Trauma Outcomes Project.


  • Pediatric Surgery, Surgery

Areas of Interest

  • Anorectal malformations
  • Abdominal wall defects
  • Trauma
  • Neonatal anomalies
  • Chest wall deformity Pectus Carinatum Pectus Excavatum
  • Diaphragmatic hernia
  • Intestinal surgery
  • Hirschprungs disease
  • Esophageal Achalasia
  • Congenital lung cysts
  • Gastroesophageal reflux
  • Hernia repair
  • Oncology
  • Thyroid surgery
  • Surgery
  • Minimally invasive pediatric surgery
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Education and Awards


  • 2011, University of New Mexico School of Medicine, MD


  • 2018, University of Washington (Seattle) - General Surgery


  • 2020, Medical College of Wisconsin - Pediatric General Surgery


  • 2006 Alumni Scholarship Award, University of New Mexico School of Medicine
  • 2010 Alpha Omega Alpha Honor Society
  • 2010 Alpha Omega Alpha Gold Humanism Honor Society
  • 2010 Patricia Numann Medical Student Award Nominee Association of Women Surgeons Foundation 
  • 2011 Alumni Award for Outstanding Community Service University of New Mexico School of Medicine
  • 2011 Commendation for Research, University of New Mexico School of Medicine
  • 2011 Southern Regional Conference Travel Award, American Federation of Medical Research 
  • 2014 International Exchange Scholar to the Royal College of Surgeons Ireland; Dublin, Ireland, American College of Surgeons
  • 2015 Travel Award, American Academy of Pediatrics National Conference 
  • 2016 National David C. Leach Award, American Commission for Graduate Medical Education (ACGME) 
  • 2016 Poster of Exceptional Merit Award, American College of Surgeons Clinical Congress
  • 2018 Outstanding Consultant of the Month, University of Washington

Research and publications


Ratings and Reviews

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