Qualification for Treatment Benefit is based on satisfying certain PRSI conditions. The person concerned would need to have paid 260 PRSI contributions at either Class A, E, H, P or S, since first starting work, and also have 39 contributions paid or credited at these classes, in the relevant tax year on which the claim is based. In 2018, this is the 2016 tax year.
If the person concerned is in receipt of Carers Allowance, they may be entitled to credited contributions which, if they also have a minimum of 260 contributions paid, could qualify them for Treatment Benefit.
I hope this clarifies the matter for the Deputy.