Q. When does my GP referral expire? 

A. GP referral letters are valid for 12 months only. You will need to obtain a new referral if your referral letter is dated more than 12 months ago. 
Your GP may also require you to attend a review appointment at the end of the initial six (6) sessions – 1st course of treatment. Your GP should provide an approval letter for the remaining four (4) sessions prior to commencing the 2nd course of treatment.