Katie O'Sullivan, MD (she/her/hers)

Assistant Professor
University of Chicago
Chicago, IL, United States

Katie O'Sullivan, MD is a dual board-certified adult and pediatric endocrinologist and Assistant Professor at the University of Chicago. She completed her medical school training at Loyola University Stritch School of Medicine, followed by Med-Peds residency training at UC San Diego, and combined adult and pediatric endocrinology fellowship at the University of Chicago. Her clinical expertise includes the management of adolescents and young adults with complex endocrine conditions including panhypopituitarism, type 1, type 2 and cystic-fibrosis-related diabetes as well as children and young adults with PMOS. Additionally, she is passionate about advancing mental health care in people with endocrine conditions.

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Presentation(s):

• MON-181 - A Case of Sky-High Dehydroepiandrosterone Sulfate and Absence of Adrenal Tumors in A 19 Year-Old Female with Polycystic Ovary Syndrome

  Monday, June 15, 2026
  9:00 AM - 2:00 PM CT

• ORF47 - Growth and Puberty

  Monday, June 15, 2026
  1:45 PM - 3:15 PM CT