The Government has agreed to give the Department of Health an additional €1bn extra to ensure it makes it through to the end of the year.
The HSE has predicted that it will run a budget deficit of at least €1.5bn for 2023.
It follows criticism of how much money the Government allocated to the health service in Budget 2024. It led to HSE Chief Bernard Gloster predicting that the health service would be in deficit again last year.
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Health was allocated an additional €960m. An additional €70m had been carried over.
This brings the final gross allocation to approximately €22.4bn for 2023. This is the highest amount of funding the Department of Health has received.
"This will fund increased demand and activity in the health service, particularly in the Acute Hospital Sector," a press release stated.
Other supplementary estimates for the year included €1.1bn to fund the 2023 elements of the cost-of-living package announced as part of Budget 2024. This includes a number of additional social welfare payments.
Some €850m will be provided to the Department of Education for accelerated progress on the school building programme and additional pay costs.
When asked about the level of supplementary estimates, a Government spokesman said that there have been "plenty of black swan events taking place annually".
"We’ve been running surpluses specifically to allow for contingencies like this," he said.
"We live in a very uncertain world at the moment. We just cannot perceive what is going to come next."
Elsewhere, Cabinet decided today to oppose a Sinn Féin motion to "lift the recruitment embargo and properly fund the health service".
Health Minister Stephen Donnelly argued that the health service hit its recruitment targets for the year early so it stopped recruiting.
He criticised the party for decrying what they described as underfunding of the health service while also calling for recruitment of positions that have not been funded.