Children are facing a postcode lottery when it comes to getting access to occupational therapy to help them through difficulties such as delayed development and poor balance.
The moratorium on recruitment means that posts are not being filled in community services despite huge demand for the service.
A recent parliamentary reply to Dublin TD Patrick Nulty revealed the poor service in the Dublin 15 area.
HSE manager Michelle Forde said there were currently 170 children on the clinic waiting list, with the longest delay time of 40 weeks.
"There are also 92 children who have already been accepted into the service.
"Since February of this year, the staffing numbers in the paediatric team have been reduced by four."
She pointed out that, as a result, it was not possible to offer appointments to children. "We will continue to prioritise children under the current resources available to us."
The HSE says occupational therapy can help a struggling child to manage everyday activities.
It cites a range of reasons why children are referred including clumsiness, delayed development, difficulty in handwriting or colouring in or problems learning to dress or use cutlery.
They may be overly sensitive to touch or sounds and have difficulty learning skills like cycling.
Some need the therapy because they are constantly jumping or fidgeting while others are "always lethargic".