Follow up with you TPA and follow below rules:
1- It is your hospital’s responsibility to provide a reasonable justification for the treatment you are undergoing.
2- All documents including, medical bills (given to the patient’s relatives in some cases), lab reports, claim forms and discharge papers need to be submitted to the hospital before discharge.
3- Remember to keep a copy of all the above for future reference.
4- If your TPA does not accept your claim, you can pay and then apply for a reimbursement from the insurance company later.