I believe the debt collecting company has inflated this bill. Also I believe their client has added charges by balance billing. 
I have disputed the bill and have requested an itemized statement- with dates of service, medical codes of all fees for service and a documentation of me consenting to the original amount due. 

I was told they could not supply the information. Prior to my call today, they did mail a very evasive statement- which was not detailed. Just an amount and a date.