Hackettstown Medical Center, based in Hackettstown, New Jersey, has been providing care to the community since 1973 and primarily serves Warren, Sussex and Morris counties in New Jersey. Our total hip replacement and total knee replacement programs are certified by The Joint Commission and our hyperbaric oxygen therapy program is accredited by the Undersea & Hyperbaric Medical Society. Hackettstown Medical Center is part of Atlantic Health System, one of the leading non-profit health care systems in NJ.