Doctors say the days of the family general practitioner who offers long consultations and makes after-hours calls are dying out with the region's ageing workforce.

Many of the bigger medical centres that are emerging across the region have strict policies that allow appointments of only 15 minutes, with patients told to book two appointments if they have multiple problems.

About 130 GPs from around Australia met in Sydney this month to demand the Federal Government stop its $275 million program to house doctors, nurses and allied health workers in so-call "super clinics".

Thirty-six super clinics have been announced, including two in the Hunter, but a new group called Doctors' Action fears the number could rise to 300 and kill off the concept of the family GP.

Super clinics are planned for Lake Macquarie and Port Stephens.

Doctors' Action founder Sydney GP Adrian Sheen said the super clinic model would put an end to the long-term trust and relationship required for good patient care.

Dr Sheen said there was a big difference between traditional, "family-orientated" practices and the rapidly growing empires of corporate clinics.

"There can be no substitute for knowing people and their families, for helping them through their issues and just being there," he said.

Several Hunter GPs likened the large clinic models to "fast medicine", asserting that, like fast food, it was all about waiting in line, getting in and out as fast as possible and quick fixes.

They say more traditional practices start with a GP taking a detailed history, developing a personal relationship with a patient, diagnosing problems and encouraging healthier lifestyles.

Nabiac GP Malcolm Fairleigh said large clinics were detrimental to patient care and many doctors would not work in them.

"Many large centres are designed to make large amounts of money to please shareholders; there is very little in that equation for patients," Dr Fairleigh said.

"They do it by churning through huge numbers of patients and taking advantage of big-ticket items."

Opposition health spokesman Peter Dutton said GPs were right to be wary of the super clinic model and he would hate to see GP surgeries turned into "a McDonald's model".