an lep is assessed by cms when a member goes ______ days or longer without creditable prescription drug coverage after they become medicare-eligible.

An LEP (Late Enrollment Penalty) is assessed by CMS when a member goes 63 days or longer without creditable prescription drug coverage after they become Medicare-eligible.

This means if a Medicare-eligible individual does not have creditable prescription drug coverage continuously for 63 days or more, they may face a late enrollment penalty upon enrolling in Medicare Part D later.