These are from a friend, not direct experience. But I know you will vet them and do due diligence for your family member.
Friend’s family member with less severe MI diagnosis/ dual diagnosis went to http://www.pinegrovetreatment.com/ Pine Grove is part of Forest General Hospital which managed the entry detox.
The other one that was recommended to them was http://www.hazeldenbettyford.org/treatment/locations/plymouth
They have other locations.
Both are expensive, but maybe if you are in the right US state, insurance would help cover?