Almost 100 children and young people in the midlands have been waiting over a year for access.
Mental health services are at breaking point across the country due to lack of staff and burnout.
SIPTU says it's imperative staffing is dealt with as a matter of urgency to prevent people leaving the sector.
The trade union says staffing issues are particularly acute in the Child and Adolescent Mental Health Services.
Figures from the HSE show 93 children and young people in Health area CHO8, which includes Laois, Offaly and Westmeath, have been waiting over a year for mental health services.
SIPTU's John McCamley says, in some cases, only half the staff required to provide services are available to work:
Two People Killed In Offaly Following Fatal Crash
Midlands Family Takes On Ireland’s Fittest Family Challenge
5K Fundraiser To Support Motor Neurone Disease Association Takes Place In Westmeath
No Slowing Down With Age As Westmeath Bowlers Shine At 14th Annual National Bowls Competition
Woman Appears In Court Over €280k Cannabis Seizure In Midlands
Status Yellow Fog Warning Issued For Leinster, Munster And Galway
Call For More Public Toilets Across The Midlands And Beyond
Nearly 600 Patients Waiting For Hospital Beds Across Ireland