Share: Facebook LinkedIn Twitter Email Seacoast Mental Health Center Return to Directory Service Diagnostician Address 1145 Sagamore Avenue City Portsmouth State New Hampshire ZIP Code 03801 Phone Number 603 431-6703 Second phone number 603-772-2710 Population Served Children, Teens, Adults, Families Website http://www.smhc-nh.org/services/clad-program/ Second Address 30 Prospect Avenue Second City Exeter Second State New Hampshire Second Zip Code 03833 Insurance We accept most major insurances and offer a sliding fee scale for uninsured consumers living in the eastern half of Rockingham County.