From our "what's reputation" help page:
Can we get a good old ampersand please? The ligature has been around for almost 2000 years (early instances can be seen in Pompeian graffiti), I'm kinda used to it.
That is apparently how Gregory House writes it. (It's not Lupus!)
An examination of the symbols on the top row of the keyboard yields:
Where a couple of symbols (namely the @ and the *) are conspicuously missing. Apparently Hugh Laurie never wrote them on the whiteboard during the entire series.
UL is an abbreviation for a number of medical terms, including Undifferentiated Lymphoma. It is entirely possible that the maker of the font confused that abbreviation with the ampersand.
Unfortunately, it requires a font editor (and an intern with a black marker and a steady hand) to fix it.