Which Wearables Are HSA/FSA Eligible in 2026?

Device-by-Device HSA Eligibility Matrix (2026)

The IRS doesn't publish a list of approved wearables. Instead, eligibility is determined by whether the expense is for "medical care" under IRS Section 213(d). For wearables, that means the device must be prescribed or recommended to diagnose, monitor, treat, or prevent a specific diagnosed medical condition — not general health improvement.

The table below covers the most commonly purchased wearables in 2026, their eligibility status, and what documentation you need to get reimbursed.

Device-by-Device Breakdown

Apple Watch Series 9 & Ultra 2 — HSA Eligible With LMN

Apple Watches are among the most frequently asked-about wearables for HSA eligibility, and for good reason: they pack genuine medical-grade sensors. The ECG app can detect irregular heart rhythms, the irregular rhythm notification monitors for atrial fibrillation, and the blood oxygen sensor tracks SpO2 continuously.

For HSA eligibility, the key is that your provider connects the Apple Watch to a diagnosed condition in writing. Common diagnoses that support an LMN for Apple Watch include:

• Atrial fibrillation (AFib) — the Apple Watch's FDA-cleared AFib history feature is a legitimate medical monitoring tool
• Hypertension — continuous heart rate monitoring supports blood pressure management protocols
• Cardiac conditions — post-cardiac-event monitoring where real-time heart data matters
• Diabetes — when paired with a CGM app to centralize glucose data
• Sleep apnea — the Apple Watch Series 9 received FDA clearance for sleep apnea detection in 2024

The Apple Watch Ultra 2 retails at $799 and the Series 9 starts at $399. At the 25% tax bracket, you save $200 on the Ultra 2 and $100 on the Series 9 by purchasing through your HSA. See the full savings table below.

Fitbit Charge 6 & Sense 2 — HSA Eligible With LMN

Fitbit devices are well-established in clinical health monitoring. The Sense 2 includes an ECG app, a continuous EDA (electrodermal activity) sensor for stress monitoring, skin temperature tracking, and SpO2 measurement. The Charge 6 offers a more streamlined profile with heart rate, SpO2, and stress tracking.

For HSA eligibility, the most common LMN use cases for Fitbit include sleep apnea monitoring (SpO2 tracking during sleep), heart condition management (continuous heart rate and ECG), and chronic disease management requiring activity and vitals data. The Fitbit Sense 2 ($299) and Charge 6 ($159) are lower-cost entry points to HSA-eligible wearable monitoring.

Oura Ring Gen 3 — HSA Eligible With LMN

The Oura Ring is unique in that it's a ring-form-factor device rather than a wrist-worn tracker, which some patients prefer for comfort or continuous wear compliance. It tracks heart rate, heart rate variability (HRV), skin temperature, SpO2, and sleep stages with high accuracy.

Medical use cases for the Oura Ring LMN typically include sleep disorder monitoring (insomnia, sleep apnea, circadian rhythm disruption), chronic illness management where resting heart rate and HRV are clinical markers, and post-COVID or long-COVID monitoring. The Oura Ring Gen 3 ($299 one-time + $5.99/month subscription) can have both the hardware and subscription covered by HSA with an appropriate LMN.

Garmin Venu 3 & Forerunner — HSA Eligible With LMN

Garmin wearables are often prescribed for cardiac rehabilitation patients and those recovering from surgery or managing chronic cardiovascular conditions. The Venu 3 includes pulse oximetry, ECG, sleep tracking, stress monitoring, and respiration rate. Garmin's Body Battery feature, which tracks energy reserves, is useful in fatigue-related condition management.

The Forerunner series (particularly the 265 and 965) are commonly prescribed to patients managing heart conditions who also need to track exercise intensity within medically defined limits — for example, staying within a specific heart rate zone during cardiac rehabilitation. The Venu 3 retails at $449 and the Forerunner 265 at $449.

Samsung Galaxy Watch 6 & Ultra — HSA Eligible With LMN

Samsung Galaxy Watch devices include blood pressure monitoring (via a cuff-calibration method), ECG, SpO2, body composition analysis, and advanced sleep tracking. The blood pressure feature, while requiring periodic recalibration, has been found useful for patients with hypertension who need daily monitoring between clinic visits.

The Galaxy Watch 6 Classic ($399) and Galaxy Watch Ultra ($649) are both eligible with an LMN connecting the device to blood pressure management, AFib monitoring, or another specific diagnosis. Samsung has pursued FDA clearance for several health features, which strengthens the case for medical necessity documentation.

Whoop 4.0 — HSA Eligible With LMN

Whoop is a subscription-first wearable — the hardware is included with the membership ($239/year or $30/month). It tracks heart rate, heart rate variability, skin temperature, blood oxygen, and respiratory rate with a focus on recovery metrics rather than activity counting. This makes it particularly relevant for patients managing chronic conditions where recovery and physiological load are clinical concerns.

Common LMN use cases for Whoop include managing chronic fatigue syndrome (CFS/ME), post-COVID long-haul monitoring, recovery from cardiac events, and sleep disorder management. Both the hardware cost and the annual subscription fee can be covered by HSA funds with an appropriate LMN. This is one of the few wearables where the ongoing subscription qualifies alongside the device.

Dexcom G7 & Abbott FreeStyle Libre 3 — HSA Eligible, LMN Often Not Required

Continuous glucose monitors (CGMs) are the clearest HSA win in the wearables category. They are FDA-cleared medical devices specifically indicated for diabetes management, and most HSA administrators classify them as straightforwardly eligible without requiring a separate LMN — similar to how lancets and test strips are treated.

The Dexcom G7 sensor runs approximately $399/month (before insurance), and the Abbott FreeStyle Libre 3 is typically $135–$150/month out of pocket. For uninsured or high-deductible patients paying out of pocket, running these through your HSA generates significant tax savings — $88–$176/month at the 22%–44% bracket range.

Note: If your CGM is covered by insurance, you may not be reimbursing from HSA. But if you're in a high-deductible health plan (HDHP) and paying toward your deductible, HSA is the right vehicle — and CGM costs count toward your deductible.

How to Get a Letter of Medical Necessity for Your Wearable

A Letter of Medical Necessity (LMN) is a written statement from a licensed healthcare provider — physician, PA, or NP — documenting that the wearable is medically required to monitor or treat a diagnosed condition. It is the single document that transforms a consumer electronics purchase into an HSA-eligible medical expense.

Here's exactly how to get one:

HSA vs. FSA for Wearables: Which Is Better?

Both HSAs and FSAs let you purchase wearables with pre-tax dollars under the same eligibility rules. But the two accounts behave very differently, and for wearables specifically, HSA is almost always the better choice.

Why HSA Wins for Wearables

The main advantage of using HSA over FSA for an expensive wearable is that you're not under time pressure. If you're getting an LMN mid-year, or if you want to wait for a new device model, HSA funds are there when you need them. With FSA, you risk losing unspent funds if you don't use them by year-end — meaning you might rush a purchase to avoid forfeiture.

The rollover advantage is especially meaningful for continuous glucose monitor users. If you're spending $400/month on a CGM, that's $4,800/year — close to the entire individual HSA contribution limit. Staying in an HDHP with an HSA and routing all CGM costs through it maximizes your tax savings without the use-it-or-lose-it pressure.

If you only have an FSA (your employer doesn't offer an HDHP), the same eligibility rules apply — you just need to be more deliberate about timing your purchases before the FSA deadline. Check whether your FSA has a grace period or rollover provision; if it does, you have more flexibility.

Use the HSA/FSA Calculator to see what your specific tax savings look like based on your income and expected wearable spending.

How Much You Save: Tax Savings by Device and Income Bracket

The savings from using HSA funds for a wearable are straightforward: you pay with pre-tax dollars, so the effective discount equals your marginal federal income tax rate plus any state income tax. The table below shows savings for the most common wearables at the three most common federal brackets.

The Triple Tax Advantage (Advanced)

For those with HSA balances they're investing rather than spending down, the wearable strategy becomes even more powerful. HSA contributions are tax-deductible (or pre-tax via payroll), the invested balance grows tax-free, and qualified withdrawals are tax-free. This "triple tax advantage" means that for long-term investors, every dollar contributed to an HSA effectively earns a higher after-tax return than the same dollar in a 401(k) or IRA — making it the best account to fund first if you can afford to pay current medical expenses out of pocket.

If you can pay for your wearable out of pocket today and save the receipt, you can reimburse yourself from your HSA years or even decades later — allowing the HSA balance to grow tax-free in the meantime. This is an advanced but legitimate HSA optimization strategy sometimes called "HSA as a stealth IRA."

Use the VitalPath HSA/FSA Calculator to see your personalized savings estimate based on your actual income and spending.

Frequently Asked Questions

Ready to Buy a Wearable With Your HSA?

The path is straightforward:

1. Identify your qualifying medical condition — the diagnosis that justifies monitoring via the wearable you want
2. Schedule a telehealth or in-person visit with your provider to discuss and obtain the LMN
3. Purchase the device with your HSA debit card or pay out of pocket and submit for reimbursement
4. File the LMN and receipt together and keep them for at least 7 years
5. For ongoing subscriptions (Whoop, Oura), keep submitting receipts against your LMN as a recurring medical expense

If you're not sure whether your specific situation supports an LMN, the safest first step is a telehealth consultation. Many platforms can connect you with a provider in under an hour, and the cost of the visit itself is also HSA eligible.

For a deeper look at everything you can purchase with your HSA — from OTC medications to dental and vision care — see our full HSA Eligible Expenses 2026 Guide and our Top HSA-Eligible Items by Category.