The site is reporting that series creator Shonda Rimes has agreed to let Heigl out of her contract, something she's wanted for some time now. It was also said that ABC Studios and Heigl still have to hammer out an exit deal. Heigl, who has played Dr. Izzie Stevens during the entire six-season run of the show, had taken more than half of this current season off and was set to return on March 1, but she hasn't been on the set at all yet. Here's an excerpt from the article.
A source within the actress' camp claims Heigl "was at home and ready to return to work." Another insider, however, "insists it's much more complicated than that." The source adds that talks between Heigl and ABC have been going on for months and last week both sides mutually decided that the best solution would be to part ways now as opposed to at the end of the season. As a result, Heigl is not expected to return to the Grey's set, which means her final episode as Izzie has already aired.