"There's no good time to say goodbye to a show and character that's defined so much of my life for the past 15 years," Chambers told Deadline. "For some time now, however, I have hoped to diversify my acting roles and career choices. And, as I turn 50 and am blessed with my remarkable, supportive wife and five wonderful children, now is that time."
"As I move on from Grey's Anatomy, I want to thank the ABC family, Shonda Rimes, original cast members Ellen Pompeo, Chandra Wilson and James Pickens, and the rest of the amazing cast and crew, both past and present, and, of course, the fans for an extraordinary ride," he added.
According to TV Line, the actor's final episode already aired on November 14, a week before the fall finale.
There is no word yet how Chambers absence will be explained on the show.