From Northern Pinellas County:

Drive south on U.S. 19
Turn left at Curlew Road
Turn right at McMullen Booth Road North
U-Turn at Briar Creek Boulevard
Mease Countryside Hospital will be on your right
 

From Southern Pinellas County:

Drive north on U.S. 19
Turn right at FL-580 East / Main Street
Turn left at McMullen Booth Road North
Mease Countryside Hospital will be on your right
 

From Tampa:

Drive south on I-275
Take exit 39 onto Memorial Highway / FL-60 West toward the Tampa Airport / Clearwater
Exit at SR-60 West on the left hand side toward Clearwater
Merge onto Fl-60
Turn right at McMullen Booth Road
Mease Countryside Hospital will be on your right