Mount St. Mary's Cardiac Center Plan Your Visit 5300 Military Rd Flr 1 Lewiston, NY 14092 Phone Number (716) 284-3278 Get Directions Servicing Hours Hours Monday - Friday: 8:30 a.m. to 4:30 p.m. Holiday Hours 11/22: Closed 11/23: Closed 12/25: Closed 1/1: Closed Services Cardiology