The planned eating disorder unit in Mount Carmel has been hit with further delays and is now not expected to open until late this year.
Last October, Minister for State Mary Butler said the service was due to open by the end of 2021.
However in December, the HSE confirmed it would not open until June 2022 at the earliest.
Read more: Covid-19 Ireland: Hospitals battling 'perfect storm' amid virus surge, says HSE chief
And now the unit will not open until late this year.
The HSE said that tender process is still ongoing and construction has not begun yet.
They said in a reply to a parliamentary question asked by Deputy Mark Ward: "The tender process has been delayed slightly as a number of clarifications were requested during the tender evaluation process.
"It is expected that the tender process will be concluded by end of March 2022.
"As and when ratified through the requisite approval processes the construction duration will be approximately 6 months."
Deputy Ward said there is a "complete lack of urgency" to tackle eating disorders.
Read more: Covid-19 Ireland: 21,098 new cases confirmed as hospitalisations near 1,400
Read more: Covid-19 Ireland: New BA.2 strain 'impossible to avoid', says Luke O'Neill
He said: "The amount of people presenting for treatment with eating disorders has increased over the last few years.
“Figures published by the Health Research Board (HRB) show that in 2020 there was a 61% rise in admissions of children and adolescents to psychiatric units and hospitals for eating disorders and a 32% increase among adults.
“There are currently just three impatient beds for adults in the state for people suffering from eating disorders and these three beds are only available to those in the catchment area of CHO area 6.
“In other parts of the HSE, adult patients are currently admitted to local general adult mental health units."
Read more: Met Eireann Ireland weather forecast mini-heatwave to continue with dramatic temperature swing
Read more: Over 430 people arrested during St Patrick's Day chaos in Dublin
Sign up to the Dublin Live Newsletter to get all the latest Dublin news straight to your inbox.
