5 C.F.R. § 894.512

What happens if I leave Federal Government and then return?

(a) Your FEDVIP coverage terminates at the end of the pay period in which you separate from government service. Exception: If you separate for retirement or while in receipt of workers' compensation as defined in § 894.701, your FEDVIP coverage continues.

(b)(1) If you return to Federal service after a break in service of fewer than 30 days , and you were not previously enrolled in FEDVIP, you may not enroll until the next open season or unless you have a QLE that allows you to enroll.

(2) If you return to Federal service after a break in service of fewer than 30 days , and you were previously enrolled in FEDVIP, you may reenroll in the same plan(s) and plan option and with the same type of enrollment you had before you separated. Exceptions:

(i) If you were enrolled in a dental or vision plan with a restricted geographic service area, and you have since moved out of the plan's service area, you may change to a different dental or vision plan that serves that area.

(ii) If you have since gained or lost an eligible family member , you may change your type of enrollment consistent with the change in the number of eligible family members.

(3) If you return to Federal service as a new hire after a break in service of 30 days or more, you may enroll if you were not previously enrolled, change your dental or vision plan, and/or change your type of enrollment.