Medibank Private says the health system is at risk if doctors won't agree to disclose how much they charge for procedures.

Medibank's push for greater transparency came as it unveiled a 7.6 per cent lift in net profit to $449.5 million and spruiked much-improved customer satisfaction and disputes data.

Medibank customer complaints have almost halved during the 2017 financial year. Credit:Bloomberg

The result pushed Medibank's shares up 6.7 per cent to $2.87 on Friday.

The company is readying for a fight with the Australian Medical Association, which is resisting the changes that would give consumers greater insight into how much a procedure will cost when it is conducted by certain specialist.