It was such a pain for me....so I decided to just pick up the phone and call the health marketplace number
1-800-318-2596 (TTY: 1-855-889-4325)
Available 24 hours a day, 7 days a week (except holidays)
sorry it's soo big (copy and pasted)
but come to find out someone was able to take out Blue Cross Blue Shield health insurance in my maiden name in a state I lived in years ago... So this may be a route to try
unfortunately, my information has been in multiple security breaches and unbelievable things like this can happen
Good Luck
