How long does the doctor have to bill a patient?

The debt remains valid until paid. However, you get legal protection after the account is past the SOL period of your state.

Check the laws of your state for info on SOL. The calculation starts from the date of last payment on the account.

I want to know how long does a doctor have to bill a patient. I have received a new bill from 06. and it has services dates as 4/28/06

My mother is 92 years old and received a bill from the billing service that bills for the doctor she sees. These charges go back to 2007 which I have the original bill and at that time we paid everything in full and now they are trying to double bill. She has Medicare and private insurance both and what Medicare doesn't pay her secondary does. Any suggestions.