Should a Medicare Recipient Have Odumbocare Too?

I am working with an U65 Medicare mb (eff 7-1-14) who has had an Odumbo Aetna plan since Dec 2013. Per this guy, Aetna reps have told him that he could have both. If this is not correct, does Aetna have to reimburse him retroactively to July 2014? He is 55 yr old male who pays $113/mo to Aetna.

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