The short answer
Most fitness trackers are not FSA eligible. SIGIS classifies activity trackers — Apple Watch, Fitbit, Garmin, WHOOP, Amazfit, generic step counters — as dual-purpose consumer wellness products. They support general health rather than treating a specific medical condition.
The exceptions are diagnostic devices: products with FDA clearance that measure clinically meaningful vital signs (blood glucose, ECG, blood pressure). These are typically eligible automatically. Some hybrid devices (Oura Ring, WHOOP) can become eligible through a Letter of Medical Necessity tied to a documented condition.
The dividing line: activity vs. diagnostic
SIGIS uses one question to classify wearables: does this device produce data that a doctor uses for clinical decision-making?
Diagnostic devices (typically eligible):
- Continuous glucose monitors (Dexcom G7, Freestyle Libre 3) — diabetes management
- ECG/EKG devices (KardiaMobile 1L/6L, Wellue ER2) — arrhythmia detection
- Blood pressure monitors (Omron, Withings BPM Connect)
- Pulse oximeters (Masimo, Wellue) — blood oxygen monitoring
- Wearable heart monitors prescribed for cardiac conditions
These devices produce data that goes into medical records, informs treatment decisions, and has FDA clearance for clinical use. They sit in the same SIGIS category as thermometers and home medical equipment.
Activity trackers (not eligible):
- Apple Watch (all generations, all sizes)
- Fitbit (Charge, Inspire, Versa, Sense, Pixel Watch)
- Garmin (Vivosmart, Vivoactive, Forerunner, Fenix)
- WHOOP 4.0 (without LMN)
- Amazfit, Mi Band, generic Amazon trackers
- Polar fitness watches
- Pebble, Coros, Suunto wellness watches
These devices measure consumer wellness data — steps, sleep stages, calories burned, exercise minutes. Even when they include FDA-cleared health features (ECG on Apple Watch, AFib detection on Fitbit), the device’s overall classification stays in the consumer wellness category.
The Apple Watch problem
The Apple Watch is the most-asked-about device in this category, and the answer disappoints most people.
The Apple Watch has multiple FDA-cleared health features:
- ECG/EKG (Series 4 and later)
- Atrial fibrillation detection
- Blood oxygen (SpO2) monitoring
- Fall detection
- Cycle tracking with temperature sensing
Despite this, SIGIS classifies the Apple Watch as a smartwatch with health features, not a medical device. The hardware also functions as a phone, music player, fitness tracker, communication tool, and dozens of other things — which is exactly what makes it dual-purpose.
Some users have successfully reimbursed Apple Watch purchases with a Letter of Medical Necessity citing AFib monitoring, fall risk for elderly relatives, or other documented conditions. Others have been denied even with strong LMNs. Plan administrators vary widely. If you’re considering this path, contact your administrator before purchasing — they can usually tell you in advance whether they accept Apple Watch LMN claims.
The Oura Ring and WHOOP situation
Both Oura and WHOOP have built FSA/HSA reimbursement workflows by partnering with TrueMed — a company that issues Letters of Medical Necessity through licensed providers based on user health questionnaires.
How it works (Oura example):
- You buy an Oura Ring directly from Oura (around $300 for the ring + $5.99/month membership)
- At checkout, you can select FSA/HSA payment with TrueMed
- TrueMed evaluates whether your responses to a health questionnaire qualify for an LMN (sleep disturbance, cardiovascular monitoring, recovery tracking for athletes with documented conditions)
- If approved, TrueMed provides the LMN and processes the payment through your FSA/HSA account
- Your plan administrator may still review and approve or deny the claim
This is a real path to FSA-paid wearables, but it’s plan-dependent. Some plan administrators accept TrueMed LMNs without question; others reject them. The success rate is higher for clear medical conditions (diagnosed sleep disorders, cardiovascular monitoring) and lower for general wellness use.
WHOOP works similarly — the membership fee (rather than the hardware) is what TrueMed processes for reimbursement.
What about the new metabolic CGMs?
A new category emerged in 2024–2025: OTC continuous glucose monitors for non-diabetics — Stelo (by Dexcom) and Lingo (by Abbott). These are marketed for metabolic health tracking, weight management, and general wellness rather than diabetes management.
The FSA situation:
- Prescription CGMs (Dexcom G7, Freestyle Libre 3) for diagnosed diabetes → always eligible
- Stelo and Lingo for non-diabetic metabolic tracking → not automatically eligible; LMN typically required
Stelo and Lingo both work with TrueMed for FSA/HSA reimbursement, similar to Oura and WHOOP. Approval depends on whether you have a qualifying condition (insulin resistance, prediabetes, PCOS-related metabolic dysfunction).
Always-eligible alternatives
If you want a wearable health tool with no LMN hassle, focus on devices that are clearly diagnostic:
- Blood pressure monitors — Omron Platinum, Omron Evolv, Withings BPM Connect ($60–150)
- ECG devices — KardiaMobile 1L ($80), KardiaMobile 6L ($150), Wellue ER2 patch monitor
- Pulse oximeters — Masimo MightySat, Wellue O2Ring (continuous overnight monitoring)
- Smart thermometers — Kinsa, Withings Thermo (FDA-cleared, eligible)
- Smart scales with body composition — generally not eligible (consumer wellness), but Withings Body Cardio with vascular age has had some plan acceptance
- TENS units and percussion devices — see is a Theragun FSA eligible
These don’t have the “smartwatch” multi-purpose problem and qualify cleanly under SIGIS rules.
How to think about wearable purchases
If your motivation is diagnosed medical condition management — diabetes, hypertension, arrhythmia, sleep apnea, cardiovascular risk — there are FSA-eligible devices specifically designed for that purpose, and they’re usually cheaper than consumer fitness trackers anyway. A $150 KardiaMobile 6L for AFib monitoring is a stronger FSA case than a $400 Apple Watch.
If your motivation is general fitness and wellness, the answer is mostly to pay out of pocket. Activity trackers are consumer products, and SIGIS treats them that way.
If you want a wellness device with FSA reimbursement, Oura and WHOOP through TrueMed is the most viable path — but verify your plan accepts TrueMed LMNs before assuming reimbursement will go through.
Don’t let the balance go to waste
If you’re set on a wearable, consider whether a clearly diagnostic device (blood pressure monitor, CGM, ECG) addresses your real health concern better than an activity tracker. Those purchases require no paperwork and produce data your doctor can actually use. Use the balance tool to see what diagnostic devices and other eligible products fit your remaining balance.