Anyone's insurance card ever get stolen?

I don't know where the heck it is, or how it has been picked up by the wrong hands, but I got a bill yesterday from some place for some date of service that I did not actually have!!!!   I just tore the house apart and can not find it.  I'm really worried-anyone else ever have this happen?  I tried to call insurance this morning but of course it is Saturday, so noone is there, or at the Medical Center that sent me the bill. 
help! 
Deb

Deb:  Unfortunately I have heard of this happen in the past.  Frustrating that its the weekk-end, but come Monday notify the insurance company and get a new card issued.  Get them to cancel the old card.  I dont know much about the legality of it all, but I dont think you will be held responsible.

What an awful thing to have to deal with.

Nicki

ACK!   That does freak me out!   

Ok, here is the story.......

As for the insurance card-I have NO idea how this happened, but I was writing thank you cards to people for various things (I am sort of an addict/OCD person when it comes to that sort of thing), and I had the address book out.  When I had picked up the book, a piece of paper fluttered out to the floor.  After I was done writing the address, I, out of nothing but sheer curiousity, picked up the piece of paper, looked at the name and address scrawled on it, and thought, "hmm, it's odd I haven't transferred that to a permanent spot in the book-I should do that now while I am thinking about it." 

So, I flip to the "S" section, and RIGHT THERE, sitting happily, is my INSURANCE CARD!!!!!!!!!!!!!!!!!!   My STUPID INSURANCE CARD?!?!?  

How the heck did it get there, I ask?!?!?  No idea.  I may be a purse slob (I always call my purse a "mom purse," because that is where I put my entire life), but I am dilligent about putting my insurance card in it's designated spot. 

We can chalk up that dilligence to breast cancer, by the way......

So, I call the questionable number for the bill I received, and it was totally a bizarre mistake.  I DO owe them $16 for my port flush, but they just picked a randomized date of service to put on the bill.  It, by the way, IS a main branch to the hospital I went to for the port flush.  I thought my dh was looney when he suggested that. 

All I can say is, "Thank the LORD that I do not have to go through another identity theft." 

My account on ebay was hacked into two years ago, and within minutes, they bid on 75,000.00 worth of stuff by using my name.  What a nightmare. 

Thanks, ladies for the support! 
Love and prayers, Deb