R41.82 — Veränderter Geisteszustand, nicht näher bezeichnet

An altered mental status occurs when a change in a person's cognitive function, alertness, or attention causes manifestations like changes in speech/behavior, disorientation, confusion, etc.

It depends on the type or severity. It can last hours or days, especially when it's acute, or months and years for chronic.

It can be cured, especially if the cause can be cured, such as infection or dehydration.