Tracy Prematta, MD Top Doctor 400 E Township Line Rd Havertown, Pennsylvania, 19083 Phone: 610-789-1313 Company Name: Delaware Valley Allergy Doctor Category: Allergy and Asthma Profile Let this business know you found them on Main Line Today's Online Directories. Locations Havertown 400 E Township Line Rd Havertown, Pennsylvania 19083 Claim/Edit Listing