WA Labor has promised to provide walk-in urgent care clinics if it wins office, but Health Minister John Day says they already exist and aren't costing taxpayers.
The state opposition has promised to add up to 15 bulk-billing clinics to major emergency departments and some suburban GP facilities.
Health spokesman Roger Cook says they will allow patients to be treated faster and reduce pressure on hospitals.
"We have record ambulance ramping right across our hospitals," Mr Cook told reporters.
"It's time to come up with solutions that work with other sectors of the health system to create a better service."
But Mr Day pointed out St John Ambulance was already rolling out urgent care clinics across the metropolitan area, starting in Joondalup in the middle of 2016, then Cockburn, with 20,000 patients treated so far.
Others were ramping up and the plan was to have 10 throughout the suburbs.
The minister said the Labor plan would cost taxpayers money, unlike the St John Ambulance urgent care clinics where patients were generally bulk-billed.
"They (Labor) don't appear to understand what is happening. They're a bit late to the game," Mr Day said.
But Mr Cook criticised the Barnett government for leaving it up to St John Ambulance to develop the clinics and not providing any input.
"The government has sat idly by waiting for someone else to come up with a solution," he said.