 This paper provides an overview of decision support systems, DSS, applied in healthcare used for diagnosis, monitoring, prediction and recommendation in medicine. The authors conducted a systematic review of articles published between September 2022 and September 2022 from PubMed, Cochrane, Scopus and Web of Science databases. They used KHCoder to analyze the included research and categorize it by type and medical application. The results showed that there are four main types of DSSs, alert systems, monitoring systems, recommendation systems and prediction systems. Each type has been applied to various domains such as diabetes, cardiovascular diseases, cancer, etc. The authors concluded that machine learning techniques have become increasingly important in providing insights into different DSS types and their applications in healthcare. This article was authored by Haussam Ben Kalfala, Mariam Jalassai, Jacques de Manjiet and others.