As a Federal employee, you are eligible to elect FEHB coverage, unless your position is excluded by law or regulation. Your agency applies these rules and determines your eligibility. However, there are numerous special provisions for people in part-time or intermittent employment, temporary appointments, and specifically named positions.
FEHB Handbook Chapter
This chapter in the FEHB Handbook discusses employee eligibility and explains the special provisions for people in part-time or intermittent employment, temporary appointments, and specifically named positions.