College: St. John's University

Medical School: Georgetown University

Internship: St. Vincent's Hospital

Residency: University of Pennsylvania

Fellowship: Urologic Oncology, Memorial Sloan-Kettering Cancer Center

Board Certification: American Board of Urology

"Top Physicians in Connecticut" (Connecticut Magazine)

Dr. Hennessy is a Founder of Urology Associates of Danbury with expertise in male fertility, erectile dysfunction and reconstructive surgery.


William T. Hennessy, MD, FACSWilliam T. Hennessy, MD

Dr. Hennessy graduated from St. John’s University in Jamaica, New York and received his MD from Georgetown University in Washington, DC. He performed an internship at St. Vincent’s Hospital in New York. Dr. Hennessy performed his residency at the Hospital of the University of Pennsylvania where he was Chief Resident in Urology from 1979 to 1980. He received his Pediatric Urology training at Children’s Hospital of Philadelphia and performed a fellowship in Urologic Oncology at Memorial Sloan-Kettering Cancer Center from 1980 to 1982.

Dr. Hennessy established Urology Associates of Danbury, P.C. in 1983. Over the past 29 years, he has served as the Chief of the division of Urology, Vice President of the Medical Staff and Vice Chair of the Department of Surgery at Danbury Hospital/Western Connecticut Health Network. In addition to practicing general urology, Dr. Hennessy’s areas of special expertise are pediatric urology and urologic oncology. Named among the “Top Physicians in Connecticut” by Connecticut Magazine, Dr. Hennessy is certified by the American Board of Urology, is a fellow of the American College of Surgeons and maintains active memberships in the American Medical Association and the American Urological Association.

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