From Long Island Expressway, Exit 33, Community Drive (northbound):
Stay in left lane on Community Drive (you will pass all five North Shore University Hospital entrances, in descending numerical order, on the right). At the first left-hand turn lane, turn left into the Lake Success Business Park. Bear to the left of the first building you will see and continue up the hill. 225 is the last building at the top of the hill. The south entrance is ¾ of the way around to the back of the building. 225 is the last building at the top of the hill on the left.
From Northern Boulevard:
Go south on Community Drive past one traffic light. Turn right into the Lake Success Business Park. Follow the directions above.