Mary B. Deegan Haff, MD

As a pediatric emergency medicine specialist at NYU Langone, my mission is to provide compassionate and comprehensive care to children in need. My family’s dedication to community service inspired me to carry this legacy of empathy and advocacy into my medical career. At NYU Langone, I am able to blend my passion for pediatrics with my commitment to emergency medicine, ensuring that every child receives the attention and care they deserve in critical situations.

My expertise lies in treating a variety of acute medical conditions in children, from minor issues to serious emergencies. These include respiratory emergencies, infections, traumatic injuries, allergic reactions, and toxic exposures. I also handle various gastrointestinal, neurological, cardiovascular, and psychiatric emergencies. With over 17 years of experience at NYU Langone Hospital—Long Island, formerly known as Winthrop University Hospital, my expertise is rooted in a profound understanding of pediatric emergency care.

Throughout my career, I have been dedicated to proactive engagement in healthcare, focusing on the unique needs of each child and their family. My approach to care is inspired by children’s resilience, which I have witnessed time and again in the face of critical medical situations. This resilience motivates me to continually advance my skills and knowledge, ensuring that I can provide the best possible care to my patients.

My journey into medicine was influenced by my parents’ dedication to community service. As a child, I saw the profound impact of their work, which instilled in me a deep sense of empathy and commitment to helping those most vulnerable. This, coupled with my admiration for children’s resilience, led me to pursue a career in pediatric emergency medicine. At NYU Langone, I am part of a supportive environment that provides advanced medical treatment across a wide range of specialties, allowing me to deliver comprehensive and coordinated care to my patients.