I am 70 years old and I am a full time employee. Since I have Medicare my insurance at work was approx $300.00 per month. Medicare is my primary. My insurance rate went to $800.00 per month and I was told this was due to the Obamacare plan. Rates are now based on age even if you have Medicare and it is your primary. This seems insane to me. What is the reasoning behind this?