CHO8, which includes Laois, Offaly and Westmeath, is the worst affected.
The HSE is only offering services to children with disabilities who have been on a waiting list since 2016.
Over 10,000 children with disabilities have been waiting over 12 months for an assessment.
The HSE's CHO8 area - which includes Laois, Offaly and Westmeath - had the highest number of children with disabilities on waiting lists.
In terms of nationwide staffing, the health service says more than 600 development posts have been allocated since 2019.
Last year Inclusion Ireland carried out a survey on the country's waiting lists, which Chief Executive Derval McDonagh outlines:
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