Tasmanian Parliament has heard 13 of the state's 51 ambulance stations rely completely on volunteers.
Clark independent MHA Kristie Johnston told Question Time on Wednesday paramedics had approached her with concerns about the over-reliance of volunteers by Ambulance Tasmania.
"Of the state's 51 ambulance stations 24 rely, at least partially, on the goodwill of volunteers, while 13 are volunteer only with no support from salaried paramedics," she said.
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Ms Johnston said she understood ambulance call-outs were staffed by single officers too often.
"This is manifestly unfair and unsafe to our salaried and volunteer officers," she said.
Health Minister Jeremy Rockliff in response said the government had increased the paramedic and despatch officer workforce statewide by 50 per cent.
He said the government at this year's election had committed to employ 48 more paramedics over the next two years.
"Once all the 48 paramedics are in place, we will commission a review of Ambulance Tasmania service demand for best-targeted future investment."
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