South Australian public patients are waiting up to five years for an appointment with specialists at Adelaide's major hospitals.
Recent figures from SA Health shows a five-year wait to see an ophthalmologist at Flinders Medical Centre, and a four-year wait for an endocrinologist at the Lyell McEwin Hospital, both in non-urgent cases.
The average wait for a neurologist at the Royal Adelaide Hospital is two years, while it could take more than one year to see an orthopaedic specialist at the Women's and Children's Hospital.
In September there were 5,021 patients waiting 1,112 days for an ear, nose and throat appointment at Flinders Medical Centre.
Opposition Leader Steven Marshall said the Government's Transforming Health reforms had been disastrous.
"Transforming Health has been a complete and utter dud," he said.
"This centralisation, this bureaucratisation that Labor have put forward has not worked."
But SA Health's Lyn Dean, the acting deputy chief executive for Transforming Health, said the waiting lists are being reduced.
"By reviewing the waiting lists, identifying where there's duplication ... we can then identify the true wait," she said.
"We've already seen some improvements in those areas, and if we still have them, we'll put in strategies to work on that."
Ms Dean said patients in urgent need would always be seen first.
SA Health said the strategy had already cut back the waiting time for renal patients at the Women's and Children's Hospital from 594 days to 41 days.
The department argued the waiting lists would be "more accurate" by mid-2018.
