In 2020, Catholic Medical Center took over the Manchester Doorway from Granite Pathways, which had overseen both the Manchester and Nashua Doorways. In Nashua, Southern New Hampshire Health stepped in.

Established in 2019, the Doorway program includes nine Doorway sites around the state that serve as entry points for people to access a range of addiction services. The federally funded statewide initiative was established to address the opioid addiction crisis