Clinical Excellence, Patient Focused Care

St. Catherine of Siena Hospital (Smithtown, NY) offers Long Islanders the highest level of care. Our doctors, nurses and supporting medical staff deliver clinical excellence in numerous specialties.

Services & Programs

Comprehensive care to meet the unique health needs of each patient.

Emergency Medicine

Our emergency department is open 24 hours a day, seven days a week, for adult and pediatric emergencies.

Radiology & Lab

Convenient access to comprehensive diagnostic and lab services.

Specialized Care

Center for Hyperbaric Medicine & Wound Healing
All the care you need in one location for all types of wound care.


Sleep Disorders Center
A comfortable, home-like setting to help diagnose and treat sleep disorders.


Dialysis Unit
Unique to our community. The unit, located within the hospital, gives convenient access to a team of experts and immediate emergency care if necessary.


The Acid Reflux and Hiatal Hernia Center of Excellence at St. Catherine of Siena Hospital

Nonsurgical and surgical treatments for patients with gastroesophageal reflux disease (GERD).

Bernard Chaimovitch with technician
Wound care patient Bernard with his technician Anthony.

St. Francis Heart Center

The St. Francis Heart Center at St. Catherine of Siena Hospital offers heart and vascular care excellence, including cardiac catheterization and Chest Pain Center.