24-Hour Emergency Care for Our Community

St. Catherine of Siena Hospital's Emergency Department in Smithtown, NY, is open 24-hours a day, seven days a week to provide rapid care to Long Islanders with emergent medical issues.

Our highly experienced and compassionate team includes board-certified emergency medicine physicians, registered nurses, radiologists and additional support staff who live in the community, know the community, and are dedicated to caring for their friends, neighbors and fellow community members.

Call 9-1-1 immediately if you are experiencing a medical emergency.

Emergency Services

We treat a range of serious to critical injuries and conditions, including:

  • Heart attack
  • Head injuries
  • Orthopedic injuries
  • Pediatric injuries
  • Respiratory distress
  • Stroke

Chest Pain Center

Our newly opened Chest Pain Center, part of the St. Francis Heart Center, provides critical care when minutes count for patients who present to the emergency department with a heart attack.

View chest pain center services


Primary Stroke Center

St. Catherine of Siena Hospital is a New York State Department of Health-designated Primary Stroke Center and certified by the New York State Joint Commission. The hospital has received the 2022 American Heart Association/American Stroke Association’s Get With The Guidelines®-Gold Plus Quality Achievement Award as well as the Target: Stroke Honor Roll Elite Award.

View stroke care services

American Medical Response

Catholic Health and American Medical Response work together to offer medical transportation services to our patients. Call for an ambulance at any time.



Paramedic-level ambulance service is available for Catholic Health patients at home, care facilities or physician offices needing urgent access to a Catholic Health hospital emergency department.

American Medical Response's 24/7 Care in Motion Transfer Center is equipped with software to facilitate single-call communication with Catholic Health providers requesting medical transportation.

Inside of Hunter EMS ambulance