Hi diesel84,
Welcome to the Forum, where there is loads of advice and people are very helpful.
My first thought was surely if he is that concerned about his children then he would be trying to stop, but being the Mum of an addict myself, I know that it is not easy.
I always thought that medical records was confidential information.
There are people he can talk too, there is loads of on line zoom meetings, I think there may be even face to face meetings now as well. If he’s serious about giving up the cocaine then he will do something about it.
I wish you and your partner well in your journey.
Take care.
Dx