Dr. Mark Jagust is an awesome physician. He and his staff are very friendly and will treat you with respect and see you promptly. He's also got a Physician's Assistant and Nurse Practitioner on board. I've seen them all at appointments and all have been great with me - answered any and all of my questions, addressed my concerns and prescribed just what I needed. The front office staff is very friendly and will treat you kindly as well and make sure that you are seen as soon as possible. I highly recommend Dr. JAgust and his staff to anyone in and around the Lake Grove area. He's on Route 25 & Stony Brook Road.