Yes. It actually doesn't matter when the insurance company issued the check or when you deposited it. The insurance reimbursement is not income. It's a reduction of your 2024 deductible medical expenses. In general you deduct medical expenses in the year that you pay them. If a medical expense was later reimbursed, it doesn't matter when it was reimbursed. If a 2024 expense was reimbursed, your 2024 deduction is reduced by the amount of the reimbursement, no matter when you got the reimbursement.
From what you wrote it's not clear whether the insurance reimbursed the full cost. If so, none of this matters because you don't have anything to deduct, so you don't need any records.
