NJ - "including amounts paid under Social Security for Medicare"

From this NJ state document in the Medical expenses deduction area: https://www.nj.gov/treasury/taxation/njit13.shtml 

This phrase - "including amounts paid under Social Security for Medicare" - what does this even mean?

Is that referring to: Box 6 on my W-2 (total YTD for Fed MED/EE on my last paystub of 2024)?

Or, is this referring to individuals who are collecting Social Security and paying for Medicare premiums?

I assuming it is referring to individuals who are collecting Social Security and paying for Medicare premiums, as I notice that adding up my FSA contributions, Medical, Dental, and Vision premiums to my federal wages (Box 1) equals my state wages (Box 16).