This document summarizes findings from research on barriers to HIV testing and treatment in Estonia, Moldova, Poland, Turkey, and Ukraine. Respondents reported various reasons for delays in getting tested and accessing care after receiving a positive diagnosis. Fears of social stigma from family and community were commonly reported barriers. Those belonging to key populations such as injecting drug users and prisoners expressed greater fears of discrimination. While many got tested within 6 months of realizing they should, respondents likely lived with HIV for longer without knowing to get tested. Improving voluntary counseling and reducing stigma, particularly from healthcare workers, may help reduce delays in testing and treatment.