The heart failure program is located on the second floor of Hackensack University Medical Plaza at Hackensack University Medical Center. Address: 20 Prospect Avenue, Suite 200 Hackensack, New Jersey 07601 Phone: 201-996-4849 Fax: 201-996-5703 Hours of Operation: Monday to Friday 8:30 a.m. to 5:00 p.m.