Can I deduct the purchase of a mobility scooter for 2023 if I charged it in December 2022 but paid the credit card bill in full in 2023?

[AnnetteB6]

No, a deductible medical expense that is paid by a credit card is considered to have been paid when the card is charged.  It does not matter when you actually pay the credit card bill.  In your case, the expense would need to be claimed on your 2022 tax return instead of 2023.