Eligibility

Flex-Ed: Shedding light on the letter of medical necessity

Every year, as we approach open enrollment (and it's we receive a lot of the same questions. And discussing the letter of medical necessity (LMN) is always at the top of the list. So, since this a column about the basics of flexible spending account use, we're happy to cover it again. Because it's important, and can impact how you shop for FSA-eligible products and services.

If you've spent some time looking through our Eligibility List, you probably noticed a classification of qualifying medical products and services as "requiring a letter of medical necessity."

In short, an LMN is like a doctor's note. Having an LMN can help any product or service that falls outside the IRS's definition of "medical care" (but can assist the treatment of a condition) get approved for FSA reimbursement.

Defining "medical care"

For a product or service to be FSA-eligible, it must treat, cure, diagnose or prevent a disease or illness. Or it has to affect a function of the body. So a product like a first-aid kit is a no-brainer, as it can be used in a huge variety of medical situations.

However, there are many treatment methods and products available that fall outside IRS guidelines that could be made eligible with some additional documentation from your doctor.

Here's an example: If your doctor suggests massage therapy to treat an injury, it's not FSA-eligible on its own. However, if you get an LMN from your doctor that outlines how the treatment method is essential to your recovery, your benefits administrator may accept it as an FSA-eligible expense.

How to submit a letter of medical necessity

If you and your doctor have identified a medical product or service that can aid the treatment of an injury or medical condition and it falls outside FSA eligibility, here's what you need to do:

  • Check with your benefits administrator to see if there is an official form to fill out for the expense to be approved.
  • If your doctor is writing a letter on his/her own, the letter must outline: what medical condition is being treated, a description of the treatment (frequency, dosage), and how long the expense will be needed to treat the condition.
  • A receipt or invoice must be submitted with the LMN for the full price to be reimbursed.

In some cases, benefits administrators may ask for additional information from your doctor, most likely for products/services that also have non-medical uses.

Beyond its direct medical use, most expenses are non-reimbursable if the individual would have purchased it anyway. In other words, this product can't be something you would purchase even if you didn't have the condition. It needs to be directly related to this course of treatment, and the specific use needs to be confirmed by a doctor.

One example is yoga. If you're already paying for yoga classes unrelated to a medical condition, your payments are not FSA-eligible, and these costs won't be covered retroactively. But if a physician recommends yoga to help a specific condition, they might submit an LMN on your behalf, to allow you to use tax-free funds to cover the costs of classes for a set period of time, until the doctor determines your treatment is complete.

With any luck, you shouldn't have any difficulties getting reimbursed for your expense as long as you keep an open line of communication with your benefits administrator and ensure that your physician is as detailed as possible.

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Eligibility

What is LMN eligible?

There are specific products and services that may be what is considered dual-purpose (can serve a medical purpose an an alternative purpose), at which point, FSA users may be able to cover the cost with a Letter of Medical Necessity (LMN) from a physician. This letter must outline how a product/service is necessary to treat a legitimate medical condition and how long it will last. LMNs are approved on a case-by-case basis by benefits administrators, so be sure to inquire with them first before seeking out an LMN from a doctor. Some administrators may have other requirements besides an LMN as well. The LMN designation is there to let you know to inquire with your benefits administrator, as the specific expense may or may not be considered eligible.