Any prior-autherization/referral required by your insurance for procedures, or specialist requires at least a notice of 72 business hours.  Prior-Autherizations can not be back dated or retroactivated.  There must be documentation in your medical record of a medical condition or suspicion of a condition in order to process a prior-autherization/referral.  It is the responsibility of the patient to know if his or her insurance requires a Prior-Autherization/Referral.