I can't tell.
Allmusic shows 12 Blue Note albums, but there could be some overlap (e.g. Quintets has only 3 unique tunes).
I think I have all the non-trio/solo stuff bar the 3 cuts on Quintets.
There are a whole bunch of trio/solo(?) albums - Trio, Trio v. 2, Trio v. 3, Art of the Trio, Blues in the Night and Immortal Session(?) - but I'm too lazy to research overlap.
Vague guess: maybe as many as 9 albums worth? Which, depending on how Mosaic programs the discs, could be a 5 to 9 disc box? But I have no idea whether any unreleased alternate takes could be added.