KeyStone Center in Chester, Pennsylvania Address 2001 Providence Avenue Chester, PA 19013 Contact (610) 876-9000 Intake: (800) 558-9600 Also try these nearby Treatment Centers in Pennsylvania Carson Valley Childrens Aid SOAR Corp Phoenix Training Institute Clem Mar House Inc For Women Recovery Center of Crozer Chester Medical Center Samara House CYWA Gaudenzia Erie Inc Outpatient Gateway Moffett House Genesis House Harrisburg Discovery House Submit a new center or provide corrections to an existing one ›