There is a parking garage behind the building on Third Street. There are signs on the garage that it is parking for 200 Old Country Road. You can park in level 3 or higher in any Unreserved spot. There is a security booth at Level 2, but you just drive through it. Level 4 has direct access to the building. There is a blue covered tunnel you walk through that will bring you to the 4th floor of the building. The clinic is on the 5th floor, Suite 590A.