While NBC has yet to share any concrete details about a 10th season of "Chicago P.D.," barring any sudden changes, the series' return is virtually a sure thing. This is due to a deal NBC announced that it finalized with Dick Wolf back in February of 2020. In light of Wolf's considerable successes with the network, they decided to ink a five-year deal with the super producer, covering future episodes of "Law & Order: Special Victims Unit," as well as the three flagship "One Chicago" shows: "Chicago Fire," "Chicago Med," and "Chicago P.D." Each "One Chicago" show received a three-season pickup at the time of the announcement.
Seasons 8 and 9 of "Chicago P.D." account for the first two of those three confirmed seasons. Season 10, then, still falls within the confines of what was announced upon Wolf's contract signing, meaning that the show's return after the conclusion of Season 9 is effectively a done deal.
Furthermore, presuming Season 10 concludes sometime during 2023, Wolf's contract should still cover an additional two years of work with NBC. It's likely, then, that if "Chicago P.D." retains its current level of success, more seasons will follow. For now, fans will likely have to wait until Season 9 concludes for more specific details about the upcoming "Chicago P.D." Season 10.