If you leave Federal Service, you may be eligible for Temporary Continuation of Coverage (TCC) for up to 18 months under the FEHB. TCC is a feature of the (FEHB) Program that allows certain people to temporarily continue their FEHB coverage after regular coverage ends. Important: You must exhaust TCC eligibility as one condition for guaranteed access to individual health coverage under the Health Insurance Portability and Accountability Act of 1996.
TCC enrollees must pay the full premium for the plan they select (that is, both the employee and Government shares of the premium) plus a 2% administrative charge.
Here are links to additional information on TCC: