Marianne Casilla-Lennon, MD

Marianne Casilla-Lennon, MD,is an Assistant Professor of Urology and Director of Medical Education in Urology at Yale School of Medicine. She is also the Interim Division Chief of Urology at VA Connecticut.

Dr. Lennon plays a leading role in medical education at Yale. As Director of Medical Education, she oversees the urology curriculum across the medical student experience, including preclinical education and clinical rotations, and co-leads the multidisciplinary Surgical Anatomy elective. She also developed and directs the Urology Medical Education Resident Fellowship, which engages residents in teaching and educational scholarship. A strong focus of her work is mentorship and early exposure to urology, with the goal of developing a diverse and well-prepared urology workforce.

As a comprehensive urologist, Dr. Lennon’s research interests span a broad range of clinical topics, including oncology, fertility, and voiding dysfunction, as well as medical education and workforce development. She has published original research in journals including The Journal of Urology, Gold Journal of Urology, Academic Medicine, and The American Journal of Obstetrics and Gynecology.

Clinically, Dr. Lennon cares for both men and women with a broad range of urologic conditions, with particular expertise in kidney stones, lower urinary tract symptoms, benign prostatic hyperplasia, and urinary tract obstruction. She performs minimally invasive, open, and office-based urologic procedures.

Dr. Lennon is committed to individualized, patient-centered care. “My goal is to ensure patients feel heard and informed, so they can be empowered to take an active role in their care,” she says. She was drawn to medicine by a desire to make a meaningful impact in people’s lives and to urology because of the breadth of treatment options it offers, from behavioral and medical therapies to procedural approaches tailored to each patient’s condition and goals.