A strike by nurses and midwives could be on the cards, if one group of graduates does not receive a pay rise.
The INMO, the PNA and SIPTU are staging a protest outside the Dáil today, before meeting with Health Minister Simon Harris.
They are calling for an incremental credit to be restored for those who graduated between 2011 and 2015.
These graduates earn up to €1,400 less than their colleagues who graduated before or after this time period.
Liam Doran, General Secretary of the INMO (said), said he would not rule out strike action.
"We are in a crisis with a shortage of nurses and midwives in this country," he said. "One of the reasons is a failure to grant this incremental credit. If it isn't granted, we will take whatever steps we need to take to ensure our nurses are treated equitably.
"What we have now is grossly inequitable. It has to be reversed."