Kerry also ran afoul of Elizabeth Corday in Season 7 when she had Mark Greene evaluated for professional competency after he showed noticeable personality changes after returning from brain tumor surgery. As a result, Kerry was not invited to Elizabeth and Mark's wedding, and while she and Mark seem to mend fences in Season 8, she and Elizabeth remained mostly unfriendly. Elizabeth sympathized and the two doctors were on better terms until Dr. Corday departed the show in Season 11. They were never close friends though. In fact, Elizabeth's departure came when she deliberately performed an illegal, life-saving transplant from an HIV+ donor into an HIV+ individual and did so in large part because she knew it would anger Kerry, leading Kerry to offer a demotion that Elizabeth declines before quitting.