osdd is practically a replacement label for ddnos (like how did is the replacement for mpd to describe the disorder better). in this case, we're talking about osdd-1 replacing ddnos-1 i know people who get diagnosed the 1a or 1b subtype, and while yes, they're not actually listed as diagnostic labels, they borrow from ddnos-1a and 1b. so while they aren't precisely aboard in our current list of official diagnoses, it's wrong to say that people are wrong for saying they have type 1a pr 1b. no, they are not exactly community terms, nor are they actually official medical terms on paper, sort of in a strange gray area where therapists may use them or something like that.