Anti-vaccination GP John Piesse's career appears to be over after the national medical board banned him from practising.

Dr Piesse looked buoyed by the presence of about 50 supporters outside the Australian Health Practitioner Regulation Agency's Melbourne offices on Thursday as he entered at lunchtime to front a Medical Board of Australia panel.

Anti-vaccination protesters rally outside the Medical Board of Australia in support for Dr John Piesse. Credit:Luis Enrique Ascui

But several hours later, it was confirmed the board had suspended him from practising medicine, meaning he cannot see patients in any capacity. The decision can be overturned if he wins an appeal.

The hearing was closed to the public, but an AHPRA spokeswoman and Dr Piesse's lawyer, Sean Cash, confirmed the controversial GP's ongoing suspension.