What Is COROS
COROS makes GPS sports watches that put your pace, distance and workout time on your wrist. Picture finishing a walk around the neighborhood and seeing how far you went, or checking your running pace without taking out your phone. COROS markets its watches around training, outdoor activities and tracking progress over time.
Its current lineup includes the PACE 4 and PACE 4 Pro for sports training, the APEX 4 for mountain sports, and the NOMAD and VERTIX 2S for outdoor adventures. Regular U.S. list prices for these models range from $249 to $699, with different screens, materials and battery capacities across the lineup.
For someone following an activity plan for a health condition, those workout records have a medical purpose. A Letter of Medical Necessity connects the watch to that plan. Our broader fitness trackers guide explains the same route across wearable brands.
Why COROS Qualifies for HSA/FSA
COROS watches qualify when they help you follow an activity plan for a health condition and a licensed provider documents that purpose in an LMN. IRS Publication 502 includes expenses for the “diagnosis, cure, mitigation, treatment, or prevention of disease.” The letter connects your activity tracker to that medical purpose for HSA or FSA spending.
- Obesity: Tracking daily activity can support a weight-management plan. In a 2022 review of 39 systematic reviews, the pooled results suggested about 1,800 extra steps a day and about 1 kilogram of weight loss with wearable activity trackers.
- Type 2 diabetes: A watch can record walking and other workouts in a diabetes activity plan. A 2023 review of 25 studies found that activity-monitor-based programs improved daily steps and HbA1c, a measure of average blood sugar.
- High blood pressure: Workout records help you follow the duration and frequency of an aerobic exercise plan. Mayo Clinic explains that regular physical activity strengthens the heart, allowing it to pump with less effort and lowering pressure on the arteries.
- Coronary artery disease: Activity tracking can support exercise goals during cardiac rehabilitation. A 2025 systematic review found that wearable-supported rehabilitation programs for people with coronary artery disease increased daily steps by about 1,060 compared with control groups.
How to Get COROS Covered With a Letter of Medical Necessity
There are two ways to get a letter connecting your COROS watch to your activity plan:
- Through Crates, typically in under 24 hours. Complete the online health assessment in 2 to 3 minutes to start your letter request. A licensed provider reviews it, and if you qualify, your Letter of Medical Necessity is issued for the COROS watch. That letter is valid for 12 months and renews each year.
- Through your own doctor, a few days to a few weeks. Book a visit and say you want to buy a COROS watch with HSA/FSA funds. Ask your provider to document how an activity tracker helps prevent, manage, or reverse your health condition. Your provider should sign and date the letter, and the visit may carry a copay.
How to Buy COROS With HSA/FSA Funds
Get your letter first, then buy your COROS watch wherever you like and get your money back:
- Get your LMN first. Use either route above, Crates or your own doctor, to get the letter for your COROS watch.
- Buy your COROS watch anywhere. Pay with your personal card, online or in store, and keep the itemized receipt showing the watch and amount paid.
- Get your money back. Crates one-click reimbursement can file the claim for you, or you can upload the letter and receipt yourself. On an HSA, keep the letter and receipt in your tax records.
Which COROS Models Qualify
These COROS watches are eligible with an LMN for their documented medical purpose. The same route applies across the lineup, so you can choose the watch that fits your activity plan.
| Model | What it is | Regular list price | HSA/FSA eligibility |
|---|---|---|---|
| PACE 4 | AMOLED GPS sports watch | $249 | Yes, with an LMN |
| PACE 4 Pro | Titanium AMOLED GPS sports watch | $449 | Yes, with an LMN |
| APEX 4 | Mountain sports watch | From $429 | Yes, with an LMN |
| NOMAD | Outdoor adventure watch | $349 | Yes, with an LMN |
| VERTIX 2S | GPS adventure watch | $699 | Yes, with an LMN |
Regular U.S. list prices from COROS's catalog, checked October 19, 2026. If you are also considering Garmin, our Garmin watches eligibility guide covers that brand's options.
How Much You Can Save on COROS
Using pre-tax HSA/FSA funds can save up to 30% on an eligible COROS purchase. For a PACE 4 at its $249 regular list price, the illustration below combines the applicable federal, state and payroll tax rates.
| Illustrated combined tax rate | Tax savings on $249 |
|---|---|
| 20% | $49.80 |
| 30% | $74.70 |
At 30%, the effective cost is $174.30 before sales tax and shipping. Your actual savings depend on your tax rates and how you fund the account.












