This document serves as a simple guide and provides a toolkit for conducting a rapid health systems integration assessment for public-private engagement. This tool can help users to understand potential pathways or barriers for integration (and sustainability) of a public-private engagement in the broader health system and then reflect on the way their engagement is structured to understand if there are potential needs to rethink the engagement model itself. Though not exhaustive, the analysis conducted of the environmental factors can be used to inform similar analysis in varying contexts. It is expected that answering these questions will aid users in determining the potential influence of the environmental factors on their public-private engagements regardless of the nature of the public-private engagement itself.