Are Countertop Water Filters HSA/FSA Eligible?

Countertop water filters fall into what the IRS calls a "dual-purpose" category which is something people buy for general wellness, but that can also serve a medical purpose depending on the individual's situation. Under IRS §213(d), that medical purpose comes down to four things:

1. You have a documented condition where water quality plays a role: You (or a household member covered by your HSA or FSA plan) have a diagnosed condition where water quality is linked managing or treating it, such as an immune vulnerability or a confirmed contamination issue.

2. The filter addresses that specific concern, not general wellness: "I want cleaner-tasting water" doesn't meet the standard on its own. What strengthens the case is a confirmed issue, like known lead contamination, paired with a filter that's actually designed to remove it.

3. You qualify for a Letter of Medical Necessity (LMN): This is the documentation from a licensed clinician explaining why your specific, documented medical condition requires a water filter as part of your treatment plan. This documentation is what allows you to spend pre-tax HSA or FSA funds on a dual-purpose item like a water filter.

4. Your plan administrator approves the claim: Final reimbursement decisions rest with your specific HSA or FSA plan, not with the retailer or with Truemed.

Eligibility is always determined on a case by case basis by an independent licensed clinician. It does not rely on the brand or its marketing but rather on the specific medical history and needs of the patient requesting to use HSA/FSA funds on the product.

On Truemed's health intake survey, the diagnosed conditions most relevant to a countertop water filter include:

• Autoimmune disease or immunodeficiency, where a provider recommends reducing exposure to waterborne pathogens or contaminants
• Crohn's disease or ulcerative colitis, where a provider has recommended limiting exposure to specific water contaminants that can aggravate GI symptoms
• Kidney disease, where a provider has recommended limiting exposure to specific contaminants or mineral content in drinking water
• Chronic lower respiratory disease, where a provider has recommended reducing exposure to certain waterborne irritants
• Mitigation of contact with water pollution, for households with confirmed contamination, such as elevated lead from aging pipes or documented PFAS levels in a local water report

If none of these apply to your situation, a countertop filter is still a great product to own. It just may not qualify for pre-tax reimbursement without a documented medical basis.

To keep expectations realistic, a countertop water filter generally will not be reimbursable when:

• The purchase is motivated by taste, convenience, or general wellness rather than a diagnosed condition
• There's no LMN or clinical documentation connecting the product to a specific and documented health or medical condition

This is the same standard that applies to other dual-purpose water products, like shower filters: the product category doesn't determine eligibility, your documented medical situation does.

Here are five countertop water filters available through the Truemed marketplace, spanning a few different filtration types and price points. All of them are subject to the same eligibility standard described above: eligible with an LMN, not automatically.

A four-stage countertop reverse osmosis system built for households that want broad contaminant reduction (lead, PFAS, and more) without installing anything permanent.

A no-install countertop filtration system designed for renters and anyone who wants stronger filtration than a pitcher without committing to under-sink plumbing.

A gravity-fed countertop system that needs no electricity or plumbing, making it a good fit for simple setups focused on chlorine, sediment, and basic contaminant reduction.

A partner offering multiple countertop filtration options, from compact carbon systems to more advanced multi-stage setups, depending on what your water report shows.

A lower-cost, pitcher-style entry point for households that want an easy countertop upgrade before considering a larger system.

For a deeper breakdown of filtration types, certifications, and tradeoffs across these and other options, see our best countertop water filter guide.

Truemed* helps qualified customers use HSA/FSA funds on home health products like countertop water filters, saving an average of 30% by paying with pre-tax dollars instead of out of pocket. Here's how the process works:

• Check eligibility: Start by seeing whether the product you're considering is typically treated as a qualifying expense or whether it needs an LMN (most countertop filters fall into the LMN category).
• Complete a health intake survey: Add the product to cart an complete a private health survey at checkout. They survey is sent to an independent licensed clinician who will review your health history and water quality concerns.
• Purchase the item: Use your HSA/FSA card at checkout, or pay out of pocket and submit for reimbursement afterward.
• Receive a determination: If appropriate, the licensed practitioner issues an LMN. Truemed itself does not make eligibility decisions; that determination always comes from the independent clinician.

Submit for reimbursement if necessary: If your claim is denied, Truemed can help you gather the substantiation your plan administrator needs.

*Truemed is for qualified customers. HSA/FSA tax savings vary. Learn more at truemed.com/disclosures

Across every water filtration category, the eligibility standard is the same: a documented medical need plus a Letter of Medical Necessity from a licensed provider. The right product depends on your water quality, your condition, and your provider's recommendation, not on which category is "easier" to get approved.