PMI Deductions to be declared on Self Assessment

Hi, I receive Private Medical Insurance and this is payrolled. Every month under the earnings tab I have PMI Single and the amount. My understanding is that this means that it is a taxable benefit and increases my taxable pay. I have however on the Deductions tab also PMI Single, which I assume is some sort of tax that has been deducted on this benefit. Could you please confirm how i can find out what the deduction is for? Should I declare this deduction somewhere on my self assessment and does it mean that the tax on this PMI has already been paid? Thank you.

Hi

If the medical benefit is taxed through your payroll then you do not need to include as a separate entry on your Self Assessment as included in your P60 pay and tax details. 

Thank you