That's a 10 per cent increase on the revenue raised from the car park in the 2017-18 financial year, and Labor's health spokesman Ryan Park said it was the sick and injured - and their families - who were paying the price.

"Getting parking around our hospitals is already hard enough without the government slugging patients and their families with expensive charges," he said.

"I am calling on the government to review these charges with a focus on making them fair for those needing treatment and their family members who provide support during this time."

Wollongong is currently the only hospital in the district with a paid parking facility, although visitors to Shoalhaven Hospital will soon feel the pinch with the new multi-storey car park nearing completion.

Mr Park said hospital parking fees had jumped across the state - with the NSW Government pocketing $49.9 million in revenue in 2018-19. The high fees were making hospital car parking unaffordable for many.

"Hospital parking fees are kind of a sick tax," the Keira MP said. "People aren't choosing to visit hospitals for fun. They're doing it because they have to."

Mr Park asked Premier Gladys Berejiklian to "have a heart" and look at reducing the fees.

Meanwhile Wollongong MP Paul Scully called on Illawarra Shoalhaven Local Health District management to review their concessions policy.

"Given the amount of revenue collected, and the comparatively small amount of concessions, a good starting point would be to re-examine the eligibility criteria for concessions," he said.

"Management also needs to ensure that those in need of relief are aware that they can apply for it, and that applications are being processed in a timely manner."

An ISLHD spokeswoman said health districts used revenue from parking fees to contribute to the operations and maintenance of car parks.

"In addition, net revenue from car parking fees is invested in the delivery of services at the hospital," she said.

The spokeswoman said that in July 2017, the NSW Government had extended car parking concessions to every NSW public hospital, with eligible patients and carers saving as much as $200 a week.

"Under the concessions policy, the first three hours of an eligible patients stay is free, a three-day discounted ticket will cost a maximum of $11.30 and a seven-day ticket $22.60," she said.

Concessions applied to a number of patients including those undertaking regular treatment, such as ongoing cancer treatment, various concession card holders, carers of long-term patients, cardiac rehabilitation and exercise class attendees and outpatients requiring daily dressings.

There were also provisions for patients and carers experiencing financial hardship.