Medical expenses are deductible in the year they're actually paid.  But if you charged the entire bill to your credit card which you're still paying off, you can claim the full cost.

For more information, please see TurboTax FAQ "Am I allowed to deduct medical expenses I haven't paid for yet?," below.

https://ttlc.intuit.com/replies/4774898

If I had a medical expense in 2021,that I charged to my credit card, but paid that charge in 2022, can I count the cost as a medical deduction on my 2022 taxes?

You can deduct medical expenses that you paid for in 2022.  An expense is considered paid when you charge it to your credit card, not when you pay the credit card bill.

So, no, the expense paid for (charged to cc) in 2021 would be reported on your 2021 tax return.   @7759as 

Thanks