The Irish Cancer Society has called for the extension of breast cancer screening to women aged 65-69 to be included in the HSE's national service plan for 2015.
It says the roll-out of screening for this group was due to begin this year under a commitment in the Programme for Government but it has not started.
The cost of screening was put at between €1.6m and €2.9m.
BreastCheck currently invites women aged 50 to 64 for free screening every two years.
Kathleen O'Meara, Head of Advocacy and Communications at the ICS, said that women aged 60-69 have the second highest incidence of breast cancer and the second highest chance of dying from it.
She said the society wanted to ensure that women aged 65-69 are not forgotten about.