Q. I have received a variety of different and confusing responses to this question. I am always sent to websites that are unclear. I am employed full time as a nurse with a Veterans Affairs hospital (15 years under FERS). My wife and I both have Medicare parts A and B through VA. We are both covered on FEHB with GEHA Basic and have been with FEHB for seven continuous years. We are both eligible for Tricare for Life as I am a military retiree. Tricare for Life coverage for medication is superior to GEHA, but we cannot use Tricare for Life as long as we have GEHA. While still employed full time, can I cancel GEHA? After I retire can I reinstate GEHA if I wish to? Does Tricare for Life satisfy the FEHB requirement to have FEHB in place for five consecutive years at time of retirement to carry FEHB into retirement?