Can you please answer this one thoroughly? Thank you. No short answer please.

Mia was on the phone with her doctor, who is also a good friend on hers. During the course of their conversation, Mia lets slip that she has been deliberately defrauding Centrelink. Can Mia rely on the law of privilege to protect that conversation from being admissible in court? Give a brief justification with reference to the relevant section of the Act.