HLN has been at the forefront of the development of integrated systems in public health. Whether conceptual, architectural, or technical, HLN has worked with leading public health agencies to bring together health information that is functional and interoperable to support program objectives. While much of our work has been in maternal and early childhood systems integration, additional projects have focused on data integration that spans many different programs and even beyond the healthcare domain as many agencies strive to support a more comprehensive view of the clients they serve.

HLN has developed and implemented various de-duplication and match/merge tools - some built cost-effectively upon Open Source tools such as FEBRL and Choicemaker - that enable records to be more accurately absorbed into a shared database. We have developed information models that assist agencies in developing plans to incorporate new data sets into existing data repositories or to create new repositories or data warehouses. We are currently participating on the CDC Immunization Information System Patient De-Duplication Expert Panel.

HLN is involved with several Public Health Information Network (PHIN) planning and implementation projects and played an active and leading role in the activities, analysis and presentation of the Public Health Informatics Institute's (PHII) Connections Community of Practice.