GP advocacy groups say funding issues are approaching crisis levels. 

Many GPs are hiking their prices as government funding fails to keep up with rising costs. 

GenPro Chairman Angus Chambers told Mike Hosking that GP clinics receive different subsidies for different patients. 

He says one of the issues is that it doesn't take into account complexity within age groups. 

Chambers says he gets the same amount of money for a 65-year-old as he does a 95-year-old, and the latter requires more input. 

Health Minister Shane Reti agrees the funding model is not fit for purpose, and he's looking forward to receiving advice on a sustainable solution. 

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