Your family member is suffering from progressive dementia, or has recently had a stroke. Health care workers are refusing to discuss matters with you for "privacy" reasons. No one seems to be in a position to make important decisions. Property needs to be managed and protected. Documents need to be signed and bank accounts accessed. You need to arrange for a more appropriate living situation or facility, and secure appropriate care. How do you manage the affairs of someone no longer able to do this for themselves?
Turning age 18 and becoming an adult does not automatically mean that every individual with a developmental disability will need a conservatorship.
Sometimes,...