From Frederick and points west:

Route 70 East

Route 27 North

Right onto Route 26

Just past fire department and high school (on left) make left onto W. Old Liberty Road (which is the service road that runs directly in front of the school and parallel with Route 26)

Immediate right onto W. Old Liberty Road.  
Winfield  Medical  Center  will be on your left.

From Baltimore Beltway:

Route 695 to Route 26 West

Continue on Route 26 through Eldersburg, where you will cross over Route 32.  You will also cross over Route 97.  You will see a plant nursery on your left.  Make next right onto W. Old Liberty Road.  Another immediate right.  
Winfield  Medical  Center will be on your left.   

From Westminster and points north:

Route 27 South

Left onto Route 26

Pass through intersection at Woodbine Road (Route 94.)
Just past the fire department and high school (on left) make left onto W. Old Liberty Road (which is the service road that runs directly in front of the school and parallel with Route 26)

Immediate right onto W. Old Liberty Road.  Winfield  Medical  Center will be on your left. 

From Washington and points south:

Route 95 North
Route 32 (second exit) toward Columbia 
Continue on Route 32

Left onto Route 26

Cross over Route 97.  You will see a plant nursery on your left.  Make next right onto W. Old Liberty Road.  Another immediate right.  Winfield  Medical  Center will be on your left.  

There are many other routes available.  If you are near a major route and would like additional travel options, please consult with your practitioner.