The question is whether its former GPs will receive the money they are owed.
Majority of Tristar doctors offered new home network.
The doctors will be near the back of the line when it comes to getting their money back, administrators warn.
Professor Julie Quinlivan is stepping down after five years at the helm.
Dr Khaled El-Sheikh says he hopes to 'help out' potential new owners.
It has 29 clinics, most of them in Victoria.
GPs could face fines or disqualification from Medicare for failing to give evidence at PSR hearings under legislation before federal Parliament.
Dr Paul Mara argues the policy would stop entrepreneurs starting new practices in areas with no unmet need.
Amendments currently before federal Parliament would expand the Medicare watchdog's powers.
Its CEO says bulk-billing will remain the norm, but there are growing areas where GPs will be free to charge private fees.