Are preexisting conditions covered? Crystal November 30, 2022 19:51 Updated Yes. There is no preexisting condition exclusion for anyone of any age, and no proof of creditable coverage is required. Related articles My child is about to turn 26, what do I need to do to remove him or her from coverage? How do I add a new dependent (adoption or legal custody) to my State Group Insurance Program coverage? Where can I find coordination of benefits examples? How long will my state-sponsored insurance be active after my termination date? Can an employee or dependent have TennCare and state group health insurance at the same time?