Liberty Medical Group=Middletown Medical Share: Health Care Liberty Medical Group=Middletown Medical Visit Website Request Info 111 Sullivan Avenue Ferndale, NY 12734 (845) 292-6630 (845) 292-0450 Facebook About Map About Liberty Medical Group a div of Middletown Medical is a multi-specialty physicians’ group dedicated to providing patients with top quality, comprehensive care in a warm and caring environment. When you What's Nearby? Distance: 5 10 15 20 25 50 mi.