5300 Military Rd.
Lewiston, NY 14092
24/7 Emergency Department
Visiting Hours: 9:00 a.m. - 9:00 p.m.
Monday – Friday: 7:00 a.m. to 4:00 p.m.
Saturday: 7:00 a.m. to 12:00 p.m.
Sunday: 7:30 a.m. to 11:15 a.m
Access lab services through the hospital’s main entrance.
Monday – Friday 7:30 a.m. to 5:30 p.m.
Evenings & Saturdays by appointment.
Monday – Friday: 8:00 a.m. – 4:00 p.m.
Monday – Friday: 8:00 a.m. to 4:30 p.m.
Monday – Friday: 7:30 a.m. to 5 p.m.
Saturday: 8:00 a.m. to 3:00 p.m.
Monday – Friday 7:30 a.m. to 5:30 p.m.
Evenings & Saturdays by appointment.
Always Open
Monday – Friday: 7:00 a.m. to 4:30 p.m.
Saturday: 7:30 a.m. to 2:30 p.m.
Monday – Friday: 7:00 a.m. to 3:00 p.m.
Monday – Friday: 8:00 a.m. – 4:00 p.m.
Monday – Thursday: 7:00 a.m. to 6:00 p.m.
Friday: 7:00 a.m. to 3:00 p.m.
Monday – Friday: 8:00 a.m. – 4:00 p.m.
Monday – Friday: 8:00 a.m. – 4:00 p.m.
Monday – Friday: 8:00 a.m. – 4:00 p.m.
Mount St. Mary’s Hospital serves the Niagara region as a New York State designated Stroke Center. As a part of the network of Stroke Centers of Catholic Health, we have a dedicated stroke care unit, state-of-the-art facilities, and inpatient rehabilitation.
Mount St. Mary's Hospital provides inpatient treatment for alcohol and substance use disorders at the Clearview Treatment Center, a confidential program dedicated to holistic care for men and women.
Mount St. Mary's Cardiology Services offer patients a full range of diagnostic and treatment procedures. We also provide cardiac rehabilitation programs using a collaborative care model.
Receive your prenatal and postpartum care at the Center for Women at Mount St. Mary's Hospital and when it comes to time to deliver your little one, you'll have access to the region's best labor and delivery services at Sisters of Charity Hospital.
Whether you’re coming in as a patient or visiting a loved one, we want you to have all the information you need to put your mind at ease. From where to park to how to order a meal, read up on our policies and suggestions for your stay!
Transparency is built into our culture, and we want you to have access to all the information you need regarding your visit to a Catholic Health hospital.
Nothing from December 29, 2025 to January 29, 2026.
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