Should primary care providers screen the aging general population for dementia, just like they do for many other diseases? One argument against this coming prospect is that there isn't much doctors can do for people who test positive—or is there? Last month in New York City, a group of dementia health care experts met to discuss whether knowing if someone has dementia helps doctors provide better overall medical care. Some evidence says yes, but identifying people with dementia is challenging in the current health care system.