Impact Connector is the platform that NZAIA uses to prompt practitioners to share ideas and write about the practice of impact assessment. In this issue of Impact Connector we focus on the practice of health impact assessment (HIA), both in Aotearoa New Zealand and internationally. The issue brings together short papers that report on examples of current practice and provide commentary on how HIA continues to develop in the face of new challenges. HIA is generally considered as an ex ante assessment of the impacts of policies, programmes and projects on human health but, as Fischer and Cave (2018) point out, HIA is not alone in making assessments of health impacts. We can and should expect to see effects on health discussed across a wide range of IA documents including Environmental Impact Assessments (EIAs), Strategic Environmental Assessments (SEAs), Social Impact Assessments (SIAs) and Cultural Impact Assessments (CIAs), and also in project and programme evaluations.