No, it's not an element. HCI would a compound consisting of Hydrogen, Carbon and Iodine, which are elements. However, HCI does not exist, but HCl (with a lowercase L) does. It is not an element, it is a compound consisting of hydrogen and chlorine, commonly known as hydrochloric acid.
HCI is a common misspelling of HCl (with a lowercase L) which is the formula of hydrogen chloride, a gaseous compound of hydrogen chloride. When dissolved in water it is called hydrochloric acid, a strong acid.