Mrs Dix is remembered on the "Great Americans Series". It is a series of stamps and it includes many women. They are definitive stamps meaning that they were part of the regular issue of a country's stamps, available for sale by the post office for an extended period of time and designed to serve the everyday postal needs of the country.
Arguably Mrs Dix is honoured in this way and recognising this in Wikidata is not obvious.
Mrs Dix is not called a psychiatrist. However her insight into the suffering of the "insane" and her work did contribute more to mental health than the many who used that title and only saw people and were of no real benefit to them.