It gets a bit more complicated than that. I don't even regularly need things from my doctor, but I have a referral to a specialist right now, and the waiting time is around 16 months to be contacted by them. At that time they will randomly call me from a restricted number. So I must have all call screening and blocking off for probably 2 years in order to accommodate this. And I can't time it because in the past I was referred to a different one and they contacted me in only 4 months when they said 12+.