Are mattresses FSA eligible?

Yes, a mattress can be FSA eligible, but only when a doctor documents a medical need for it with a Letter of Medical Necessity. A mattress bought for ordinary comfort does not qualify.

FSA plans reimburse expenses that treat a diagnosed condition, not general wellness purchases. A mattress prescribed for a specific condition, such as chronic back pain, can count, but the plan administrator makes the final call. Eligibility rules differ between plans, so confirm with your administrator before buying.

A standard mattress bought for comfort alone is not FSA eligible without medical documentation.
A mattress needs a Letter of Medical Necessity from a doctor to qualify for FSA reimbursement.
The letter must tie the mattress to a diagnosed condition, such as chronic back pain.
The FSA plan administrator, not the mattress seller, decides whether a mattress purchase is approved.

01Important Exceptions

Plan administrator says no: A Letter of Medical Necessity does not guarantee approval, because some FSA plans reject mattresses outright, so ask for written confirmation before buying.
Letter names no diagnosis: A note saying a firmer bed would be "better for sleep" fails, because the letter must tie the mattress to a specific diagnosed condition.
Only part of the cost qualifies: Some administrators reimburse just the portion that exceeds the price of a standard mattress, so expect a partial payout on premium or luxury models.
Plan year has ended: An FSA purchase must fall inside your plan year or grace period, and unspent funds can be forfeited, so buy and file before the deadline.
Bedding and toppers separately: Pillows, sheets, and comfort toppers bought for general sleep are usually not eligible, even when the mattress itself was approved with documentation.

02Examples in Practice

Chronic back pain diagnosis: A doctor writes a Letter of Medical Necessity recommending a firmer orthopedic mattress for diagnosed lumbar pain, so the FSA administrator is far more likely to approve reimbursement.
Replacing a worn bed for comfort: A buyer swaps a sagging mattress with no medical note, and the FSA plan will almost certainly deny the claim as a general household purchase.
Doctor's note without a diagnosis: A letter saying only "sleep better" lacks a named condition, so administrators commonly reject it and ask for a diagnosis-linked statement.
Letter obtained after purchase: A mattress bought first and documented later often gets denied, because most plans want the medical necessity letter on file before the expense.
Seller's receipt as proof: A mattress retailer calling a model "FSA eligible" doesn't settle anything, since the plan administrator alone decides whether the claim is approved.