If your appointment is PrEP-related, there are programs to help cover the cost of your appointment and labs, for those who qualify. For STI testing patients, if the “Pay Now” price is paid in full at the time of the visit, you should not receive a bill from LabCorp. If you received a bill from LabCorp for services that were paid for at the time of your visit, please see the “Unexpected Bill” section for instructions on submitting a request to the Bill Slayer.