My Boyfriend Is on Parole and Has a Drug Addiction Can He Go to Rehab Without Any Legal Consequences?

My boyfriend is on parole house arrest and he has a drug addiction he wants help he wants to go to rehab but he is on house arrest and he is worried that if his parole officer knows about his addiction he will send him back to jail. I don’t know who to contact about this. Can he tell his parole officer and there won’t be any consequences because he is seeking help or will I lose him to the drugs? Pls help us!