|Portrayed by||Lesley Harcourt|
|Introduced by||Sean O'Connor|
|First Appearance||17 October 2016|
Katie is a hepatology consultant who Ben Mitchell visits to discuss donating part of his liver to his father Phil Mitchell. Ben's mother Kathy Sullivan interrupts the appointment and Katie reassures her that Ben would not be referred to a transplant centre until Phil had been sober for at least six months. Katie explains what would happen if Ben did not ahead with the transplant and talks him through the risks.
Kathy then tells Katie about the deaths of Ben's grandmother Peggy Mitchell and boyfriend Paul Coker and explains that Ben is going through the with the transplant to make himself feel better about his grief. Katie arranges for Ben to see a psychologist before going to the transplant centre.