BCBSM appeal question???

Good Morning....

I have BCBSM, my VSG surgery was May 14, 2009.  I was told everything was covered, in January 2010 received an EOB saying I owed money, called the doctors office, was told not to worry about it, so I didn't....  just last week, Feb. 2011 received a statement from doctor saying I owe $2500.  What is the appeal process with BCBSM, is it too late?  Time limits, etc?

Thank you!

You have 2 years from the date of service.    The appeal process in on your EOB from BCBSM.  Why did they deny it.  What was your BMI and co-morbidities.