Is Melatonin FSA/HSA Eligible?

No, melatonin is not generally eligible for Flexible Spending Account (FSA) or Health Savings Account (HSA) expenses. However, it may be eligible when accompanied by a Letter of Medical Necessity (LMN).

Why Is Melatonin Not FSA/HSA Eligible?

Melatonin is generally not eligible for reimbursement through a Flexible Spending Account (FSA) or Health Savings Account (HSA) because it is classified as a dietary supplement.


Under IRS guidelines, FSA and HSA funds can only be used for products or services that are medically necessary to treat, diagnose, or manage a specific health condition. Since melatonin is often used for general wellness or to support healthy sleep patterns, it does not meet the criteria for medical necessity unless prescribed for a diagnosed condition.


Melatonin may qualify for FSA/HSA reimbursement if a healthcare provider determines it is medically necessary to treat a specific condition, such as chronic insomnia or a sleep disorder. In such cases, a Letter of Medical Necessity (LMN) would be required to justify its use and eligibility.

How to Purchase Melatonin With an FSA/HSA

If your doctor determines that melatonin is medically necessary for treating a diagnosed condition, you can use your FSA or HSA funds by following these steps:

  1. Obtain a Letter of Medical Necessity (LMN):

    • Consult your healthcare provider about your condition and discuss whether melatonin is necessary for treatment.

    • Request an LMN that outlines your diagnosis, the reason for prescribing melatonin, and its role in your treatment plan.

  2. Confirm Approval with Your FSA/HSA Provider:

    • Submit the LMN to your FSA or HSA administrator for review and approval before making your purchase.

  3. Purchase Melatonin:

    • Use your FSA or HSA card to buy melatonin at a retailer that accepts these payment methods.

    • If the retailer does not accept FSA/HSA cards, pay out-of-pocket and save your receipt for reimbursement.

  4. Submit a Reimbursement Request:

    • If you pay out-of-pocket, provide your FSA/HSA administrator with the following documentation:

      • A copy of the LMN.

      • The receipt, including:

        • Name of the retailer or provider.

        • Date of purchase (must fall within the plan year for FSAs).

        • Description of the product purchased.

        • Itemized details with UPCs, if applicable.

        • Total cost of the purchase.

  5. Retain Documentation:

    • Keep copies of your LMN and receipts in case additional verification is required.

By ensuring melatonin is tied to a specific medical need and providing proper documentation, you can effectively use FSA or HSA funds to support your treatment. Always confirm eligibility with your FSA/HSA provider to avoid reimbursement issues.

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