Once you walk across into Tijuana, take the pedestrian bridge that takes you across to the other side of the border crossing, you will see the yellow cabs there, you can take one of those, they are syndicated and have been there for many years.
First make shure the driver knows how to get to our dental office, so let him know our address: Av. Union 2192-16 Col. Marron. Tijuana, Baja California, Mexico.
A good reference: Our Tijuana dental clinic is in front of Guisseppis pizza Agua Caliente (A very famous italian restaurant) make shure the taxi driver knows where it is before taking the taxi.
Yellow cabs at the border in Tijuana.