Q. I am currently a USPS Letter Carrier covered by Samba under FEHB. I plan to retire in November of 2016. May I switch to another provider (I.e. Blue Cross Blue Shield) during open enrollment or do I have to be covered under the same provider (in my case Samba) for 5 years to continue coverage after retirement?A. You only have to be enrolled in the FEHB program for the 5 consecutive years before you retire, not in one plan. In fact, you could change plans every year for the 5 years before you retire and carry that FEHB coverage into retirement.