What year do I claim medial premiums paid in 2025 for coverage in 2026?

I currently have to pay my Medicare Part B premiums in advance, three months at a time.

My bill for January, February and March 2026 is due December 25.  I paid my bill on December 21 with my Visa credit card.

Since I am not being reimbursed for that cost, it is eligible to be included on Federal 1040 Schedule A as a "medical expense".

I paid the bill in 2025.  But it's for coverage in 2026.

I'd like to claim it as a "2026 medical expense" - that seems logical to me.  Would the IRS approve of that?

Or since I had to pay the bill in 2025 do I have to claim it as a "2025 medical expense"?

I couldn't find the answer to my question in IRS Publication 502, Medical and Dental Expenses.

And the IRS "chat bot" (or whatever it is) wouldn't let me talk to a person.

I know this is not the IRS, but this seems like a common situation so I thought I'd ask.

Thank you!