Yes, if you have a prescription from the doctor and the bed was a direct remedy for a condition you have, then you may claim the bed as a medical expense.
Be sure to refer below to see what rules apply to deduct medical expenses, as well as how to enter them into TurboTax.
https://ttlc.intuit.com/replies/3301457
https://ttlc.intuit.com/replies/4774888
