Macdonald said the Government had indicated it planned to review primary health funding but that appeared to have morphed into a sector wide review announced this week.
"This is not particularly helpful for primary care as the funding review was considered by the sector as urgent and the Labour government acknowledged this in their election promises," she said.
One GP spoken to by the Wanganui Chronicle echoed the concern he would struggle to meet an increased demand for appointments.
Another said it already offered a special low cost service (usually below $20) and the Budget announcements were largely irrelevant.
Macdonald said it was fairly normal to see lower fees in Whanganui when compared nationally.
"We're a district where the GPs acknowledge that we have a high level of poverty in our community and therefore we've always adopted fairly quickly any reduction in fee.
"It does make an incredible difference for a lot of our families who find accessing healthcare not that affordable."
The lower fees for Community Services card holders would come into effect if a GP opted into the subsidy from December and it wasn't already in the special low cost service.
It was up to all the practices whether they also opted in to free visits for under 14-year-olds.
Several other GPs were approached for comment but weren't yet able to say whether the Budget announcements would have any effect.
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