Mark S Borer MD 846 Walker Rd Ste 32-1 Dover, Delaware, 19904 Phone: 302-674-2265 Company Name: Dr Mark S Borer Md Doctor Category: Psychiatry Profile Let this business know you found them on Delaware Today's Online Directories. Locations Dover 846 Walker Rd Ste 32-1 Dover, Delaware 19904 Claim/Edit Listing