There are three ways to reach the clinic at the Oudezijds Achterburgwal 132:
By car: It's difficult to find parking space in the immediate vicinity of the clinic. The best option is the parking garage at Dam Square: Bijenkorf parking garage (entrance Damrak).
An alternative is parking at one of the P+R train stations (for instance Transferium Arena) and taking the subway from there to subwaystation Nieuwmarkt (parking for 24 hours is € 8,00, including a subway return ticket for 5 persons max).
By subway: exit at Nieuwmarkt station. Cross Nieuwmarkt square diagonally to the left, and turn right on the corner via the Bloedstraat to the Oudezijds Achterburgwal. Go left towards the bridge, cross the bridge on the right, immediately turn right again and after 50m you'll find the clinic (nr. 132).
By train (NS): Exit at Amsterdam Central Station, south exit. If you want to go by foot (12 min) cross the square, and follow Damrak to Dam Square. An alternative is to travel one stop by street car / tram lines 4-9-16-24-25 to Dam Square. From this point turn left into Damstraat. At the second canal turn left before crossing the bridge onto Oudezijds Achterburgwal. After 50m you'll find the clinic (nr 132).
See the map below and find your route by clicking on "To here" button in the balloon. Should you see only a white box please press the "F5" button or "refresh" in your browser menu or click on "View larger map".