[1] Murphy works as a physician in the Auckland and Counties Manukau District Health Boards.
[2] From 2019, Murphy served two years as the Honorary Medical Director of the Diabetes Foundation Aotearoa.
She aims to use genetics to identify biomarkers for diabetes risk in order to develop precision medicine treatment strategies.
[6] Murphy also led research that showed bariatric surgery in New Zealand was a 'postcode lottery'.
[7][8][9] Murphy leads a specialist weight management service Te Mana Ki Tua that was opened in June 2023.