12DD marked despite never having an employer health plan

What do I do if this occurred? My employer sent me a W2 in which they marked box 12 and put code DD but I never had insurance through them as I went through the marketplace all year? I live in Michigan so this doesn't seem to affect me either way but this screams fraud to me. I also have an employer who has reported me receiving nearly double in earnings in what I received in gross earnings. Is this going to get me audited? Should I report these?