Cassidy was born and raised in Grant County, Kentucky. Growing up with three sisters, including a younger sister with type 1 diabetes, she became passionate about pediatrics at a young age. She studied biology at Morehead State University and got her medical degree at the University of Louisville School of Medicine. During her training, she developed a strong interest in medical education as well as tackling health inequities to improve care for all pediatric patients.

In her free time, she loves to cook plant-based recipes, spend time with her husband and two kitties, and play the piano. Outside of her home, you can catch her watching theatre and hiking.