"Chord" implies "function." This collection of notes does not have a function in the western idiom (besides sounding very cool). This is just a D with added color tones. Sorry.
At one time in music history, what we call a simple "seventh" chord (particularly, its embedded tritone) was not even allowed, thus, was "not a chord" either.
But I think at some point there has to be a limit. Dmajorsus9add11 just does not instantly register in my mind like 7b9 or #5 or m6. And I don't think the problem is with me!