Izzy Stevens is a fictional character from the television series Grey's Anatomy. She is portrayed by actress Katherine Heigl and first appeared in the show's inaugural season. Izzy is known for her compassionate nature and strong desire to help patients, often going above and beyond in her medical duties. Throughout the series, Izzy faces various personal and professional challenges, including her relationships with fellow doctors like Alex Karev and George O'Malley. Her character experiences significant growth, ultimately leaving the hospital to pursue new opportunities, which marks a pivotal moment in the show's storyline.