ABC has opted not to pick up the back nine episodes of Private Practice. Episode 613 will be the series finale. Star Kate Walsh announced last spring that she would be leaving the show after this season's thirteenth episode. According to Deadline, ABC and showrunner Shonda Rhimes came to a mutual decision to end this show. The show has struggled in the ratings since moving to Tuesday at 10PM. The most recent episode on October 9 garnered a 1.6 adults 18-49 rating and ranked last in the time period. Rhimes tweeted a note to fans that reads in part, "I’m sad to say that Private Practice’s run will end after episode 613 this season. There was a lot of discussion and debate but, in the end, the guys at the network and the studio and I all decided that Private Practice was reaching its finish line." You can read the rest here.