Background The reassessment of technologies and services offered by healthcare systems is recent initiative and still without a widely adopted and evaluated method. To a better understanding of this process in Brazil, we have described the health technology reassessment (HTR) performed by the National Committee for Health Technology Incorporation (Conitec) into Brazilian public health system (SUS). Methods A documental, exploratory, descriptive, retrospective study with qualitative-quantitative approach regarding the HTR performed by Conitec from January 2012 to November 2017. Results After applying the criteria of inclusion and exclusion, we selected 47 technologies for this study. The vast majority of the demands (41 demands) came from the public sector, and only six from the private sector. Most of the requests referred to the exclusion of specific indication; followed by extension of use, withdraw of the technology from SUS, maintenance, and restriction of use. The dimensions of analysis found in the recommendation reports were scientific evidence on efficacy, effectiveness and safety, disease-related issues, issues related to the use of technology, costs, and social participation. However, these dimensions were not included in all analysis, and a standardized structure of the reports has not been observed. The most relevant decision factors considered for decision-making were efficacy, safety and use of the technology. Conclusion During a six-year period of Conitec actuation, we could find some reassessments of technologies that are available in SUS. We observed that these activities had enabled progress, however, they are still not yet structured, with gaps in the selection process, and the assessment since no methodology and criteria for proper conduct were established.