International Journal of Neutrosophic Science IJNS 2690-6805 2692-6148 10.54216/IJNS https://www.americaspg.com/journals/show/954 2020 2020 Department of Mathematics, Bannari Amman Institute of Technology, Sathyamangalam-638401, Tamil Nadu, India. Mani Parimala Department of Mathematics, Bannari Amman Institute of Technology, Sathyamangalam-638401, Tamil Nadu, India. Muthusamy Karthika Department of Mathematics, Coimbatore Institute of Technology, Coimbatore, Tamil Nadu, India. Sivaraman Murali Mathematics & Science Department, University of New Mexico, 705 Gurley Ave., Gallup, NM 87301, USA Florentin Smarandache Department of Mathematics, University of the Punjab Lahore, Pakistan Muhammad Riaz jafaripersia@gmail.com Saeid Jafari The scope of this manuscript is to instigate the present-day perception of complex neutrosophic nano topological spaces and delve into a few of its spectacles. We also illustrate the spectacles with numerical quantities. Decision making plays an important role to diagnose a diseases in medical field. So a method is developed to achieve this under complex neutrosophic nano topological spaces (CNNTSs). A comparative assessment is provided to demonstrate the distinction between the unique concept and the existing approaches. 2021 2021 127 143 10.54216/IJNS.170204 https://www.americaspg.com/articleinfo/21/show/954