HSA/FSA

Do You Need a Letter of Medical Necessity for Electrolytes?

Not here. Saltivate is HSA/FSA eligible at checkout, so you pay directly with your HSA or FSA card and you are done. No letter, no reimbursement claim, no third-party approval step.

Some electrolyte brands route you through a Letter of Medical Necessity first. Since the term causes a lot of confusion, here is what that letter actually is, what it can and cannot do, and when you genuinely need one.

The basics

What a Letter of Medical Necessity actually is

A Letter of Medical Necessity, or LMN, is a note from your doctor stating that a product or service treats a specific medical condition you have been diagnosed with. Its real job is narrow: it is the documentation an HSA or FSA administrator can request for so-called dual-purpose items, things that are sometimes medical and sometimes not, before approving them as a qualified medical expense.

In other words, an LMN is a tax-substantiation document. It is not an insurance benefit, and it is not a golden ticket that makes a health plan pay for over-the-counter products.

Reality check

What an LMN can and cannot do

What it can do

  • Substantiate a dual-purpose itemDocuments that a product treats a specific diagnosed condition, if your HSA/FSA administrator asks
  • Record a clinician's adviceKeeps your doctor's recommendation on file with your plan paperwork

What it cannot do

  • Make insurance cover OTC electrolytesRegular health plans routinely deny over-the-counter products, letter or not
  • Turn food into a medical expenseThe IRS warned in 2024 that a purchased note does not convert everyday food or wellness buys into medical expenses
  • Replace a real diagnosisLetters based on a self-reported questionnaire do not meet the IRS standard

The fine print

What the IRS actually says

The IRS published an alert in March 2024 warning about companies that sell doctor's notes to make food, nutrition, and wellness purchases look like medical expenses. Its position is blunt: a note based merely on self-reported information does not make an expense medical, and food only counts at all when it treats a specific diagnosed condition, does not just satisfy normal nutritional needs, and even then only for the cost above ordinary food.

You can read it directly: the IRS alert on medical expense misrepresentation and the IRS FAQ on nutrition and wellness expenses.

None of this is a problem when a product is eligible as sold. It is why we set Saltivate up so your card simply works at checkout instead of asking you to collect paperwork.

The easy way

Skip the letter. Use the card.

Saltivate is HSA/FSA eligible at checkout: 800mg of sodium per serving, zero sugar, and your HSA or FSA card pays directly, pre-tax. That is roughly 30% saved without a single form.

See how HSA/FSA checkout works

Common questions

Letter of medical necessity FAQ

Do I need a Letter of Medical Necessity to buy Saltivate with my HSA or FSA card?
No. Saltivate is eligible at checkout, so your HSA or FSA card pays directly, the same way it does at a pharmacy. There is no letter and no reimbursement claim to file.

Why do some electrolyte brands ask for an LMN?
Because their products are not eligible as sold, they route you through a third-party letter service that issues a Letter of Medical Necessity before your card can be used. That adds a signup, a questionnaire, and an approval step to every purchase, and the IRS has warned that questionnaire-based letters do not turn everyday food or wellness purchases into medical expenses.

Will an LMN make my health insurance cover electrolytes?
Generally no. Regular health plans rarely cover over-the-counter products, with or without a letter. The narrow exceptions in state law cover prescription medical foods for inherited metabolic disorders, which is a different category. If a brand tells you a letter will get their product covered by your insurance, treat that claim with caution.

What if my FSA administrator asks for documentation anyway?
Keep your receipt and order confirmation; that is usually all an administrator needs for an eligible item. If yours asks for more, contact us at max@saltivate.com and we will help with the paperwork.

Is a Letter of Medical Necessity ever the right tool?
Yes. For genuinely dual-purpose items, an LMN from your doctor tied to a specific diagnosed condition is exactly what HSA and FSA administrators want to see. The point is simpler: with Saltivate you do not need one, because the product is eligible as sold.

Which Saltivate products are HSA/FSA eligible?
Our electrolyte powders, the flavored sticks and jars and Raw Unflavored, are HSA/FSA eligible. Accessories like bottles and merch are not. See the HSA/FSA page for how checkout works and answers to card-specific questions.