17yo DS needs a medical procedure.I phoned the GP who then phoned DS to discuss it. The GP told DS he would need a blood test first, so I took DS to the hospital and was told to ring the GP in a few days. The thing is DS is "too busy" to phone the GP. When he does phone he's point on hold and gets fed up. He's working at his part time job (which seems to be a full time job atm because they're so busy) so that's his excuse.
The GP receptionist won't talk to me. She just says she can't give me the results of the blood test because he's over 16. I don't want the results of the blood test; they would be meaningless to me, I just want to know what's supposed to happen next. 
Does the doctor now refer DS anyway or does DS need to have another telephone conversation with the GP?
As you can tell I very rarely have dealings with the GP.
DS does want the procedure, but still needs a bit of parenting. Would getting DS to write a letter be the way forward? DH has offered to grunt down the phone like a teenager, pretending to be DS but I think that would be illegal. 