View practice information for Dr. Thomas Mullen in Seaford. ... 8466 Herring Run Rd Seaford, DE 19973. Dr. Thomas Mullen 8466 Herring Run Rd Seaford, DE 19973 Looking for more options? Let Us Help (800) 265-6200 THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual ....