Human Resources and Security Specialists should use this tool to determine the correct investigation level for any covered position within the U.S. Federal Government.
You don't have to take Part B coverage if you don't want it, and your FEHB plan can't require you to take it. There are some advantages to enrolling in Part B:
If you didn't take Part B at age 65 because you were covered under FEHB as an active employee (or you were covered under your spouse's group health insurance plan and he/she was an active employee), you may sign up for Part B (generally without an increased premium) within 8 months from the time you or your spouse stop working or are no longer covered by the group plan. You also can sign up at any time while you are covered by the group plan.