Yeah back in the 90s it was still in use in some diagnostic criteria, even though it was already considered dated then. These days I don't think it's used in a medical capacity anywhere anymore.

I don't think it's solely a you problem as many people do consider the term too offensive to use, but it is one of those words the jury is divided on, with just as many people using it nonchalantly. I expect over time it'll be no different from moron or idiot.