Hospital?!

Oh boy... here we go....
I HOPE this will not be a big headache, but I'm mentally preparing myself for a nightmare.

I noticed on Friday, I got an important looking envelope from a local hospital. Huh, It's prob just some marketing mail or something. Well, last night, I opened it and almost fell off my chair. It was a BILL for $719.00!!! What?! I look at it again, yep, it's in my name, and I look at the reason. It just says that I visited a Dr. Mazz (not his real name) for an Emergency Room visit back in November of 2008. Now you've probably guessed by now the problem here.... I was never at that hospital!
I can't call their billing department until Monday to get things straightened out, so now I have another full day of worrying what all this will mean. Of course I'm HOPING it's some weird clerical error, and after one phone call it will be resolved. But I am also afraid of the worst too. Medical identity theft. I googled that last night, and of course was met with several horror stories of folks who went through this. So again, I'm trying not to worry about it. But it's tough.
My fear is what other information this "alternate me" has about me. Did he just pull my name and number from a phone book? Does he have my social sec number? What other info does he have (if any?!)
I can't comprehend how this can happen. My friends and family will tell you that I'm SO careful about protecting my personal information. To the point of being a little over-protective. (whenever I use my credit card at a store, I try to keep my finger over the numbers in case there is a camera above).

Well, I hope to post a follow up here on Monday that is good news.