Not that it matters to viewers, but Scrubs producer Bill Lawrence told the Hollywood Reporter that the NBC show might move to ABC.
It turns out that Scrubs is produced by Touchstone Television, which is part of the ABC/Disney empire. NBC has little incentive to market the program since the bulk of the profits go to its rival. Thus, ABC would be a more natural fit.
Since the entire cast is already under contract for next season, this move could happen quickly.