The HSE says the recent cyber attack has delayed the progress of a review into care received by children and young people in South Kerry.
The HSE is reviewing the files of some children and young people who attended the South Kerry Child and Adolescent Mental Health Services during the period 2016-2020, due to concerns over medication prescriptions.
In April, it emerged the HSE was reviewing the files of over 1,500 children and young people who attended the South Kerry Child and Adolescent Mental Health Services.
This was amid concerns some were prescribed dangerously excessive amounts of medication.
Cork Kerry Community Healthcare now says the timeline for the completion of this review will be affected by the cyber attack on HSE IT systems.
It says the review was due to be completed in August, however, a definite date cannot be set as staff do not have access to all electronic and online systems.
The HSE says that as the team reviews cases and files, any urgent issues will be dealt with immediately and it remains committed to sharing the review findings and recommendations, once the review process is completed.
The helpline remains open on 1800 742 800 from 9am to 5pm, Monday to Friday.
Meanwhile, it was reported in recent weeks that legal proceedings have been initiated against the HSE in relation to the alleged overprescribing of medication.