Or later! As a patient I've received both payments from insurance providers and overpayment reimbursements from medical providers before the explanation of what

Or later! As a patient I've received both payments from insurance providers and overpayment reimbursements from medical providers before the explanation of what the check is for. Usually just a day or two if that, but if something gets missed and has to go through a reconciliation process I could easily see that EOB letter going out a month or more later.