Patient Portal Access; Patient Portal Access. eculcea. We offer Patient Portal A ccess. Please click on the link. Details. Atlas Neurology 401 15th Ave S Suite 101 Great Falls, MT 59405 Phone: (406) 315-5950 Fax: (406) 952-1077 Email: atlas.neurology@gmail.com Social. × Make an appointment and we’ll contact you. ....