Wow that is extremely inaccurate. It lists 10th gen which are socket 1200 and only work with the new 400 series chipset. You may want to find a better source of information, like from the manufacture.Yes, it is.
find it on this website under compatible cpus > intel > i5 9th gen
https://www.pc-specs.com/mobo/MSI/MSI_Z170A_GAMING_M5/3489/Compatible_CPUs