Dr Oldfield completed her medical training in the UK. Moving with her family to New Zealand in 2004, Dr Oldfield obtained her NZ general practice qualification. She then worked as a GP in a busy urban practice in New Plymouth. Whilst working there, Dr Oldfield decided to pursue her interest in Integrative Medicine, combining her passion for lifestyle and nutritional medicine.
She set up her own integrative practice in 2012 in New Plymouth. In 2016, she completed six months in a busy integrative GP practice in Australia, where she gained invaluable skills and knowledge.