Commack Volunteer Ambulance Corps 200 Burr Rd, Commack, NY11725 Commack Volunteer Ambulance Corps (CVAC) is a volunteer, not-for-profit ambulance service which provides pre-hospital…More emergency care and transportation. Its services are available to the residents of Commack, Elwood, Hauppauge, Smithtown, East Northport and Huntington. CVAC operates four advanced life support ambulances and three advanced life support first responder cars. It also takes efforts to prepare and instruct people on first aid, CPR and more. C. W. Schwalbe is the chief of CVAC. For more information, call the number provided or visit the Web site.