FHI 360 provided technical assistance in developing the Service Availability Mapping for HIV, Sexually Transmitted Infections, Gender-based Violence and Tuberculosis, National Capital District – Papua New Guinea report for the Strengthening HIV/AIDS Services for Key Populations in Papua New Guinea project. In this article, Dr. Justine Nankinga, FHI 360 Senior Technical Officer and Research Team Leader, discusses how the report can provide information on the gaps to be addressed to scale up services.