OTC CGM HSA FSA Eligibility Guide (2026)
An over-the-counter continuous glucose monitor costs about $1,000 per year. For many people managing prediabetes or metabolic health, that's a significant expense. The good news is that you can use pre-tax dollars from your HSA or FSA to pay for it, saving you 20% to 30% on the cost. Understanding OTC CGM HSA FSA eligibility is key to accessing this tool affordably. This guide explains the IRS rules, how to confirm your plan's approval, and the exact steps to purchase or get reimbursed.
Prerequisites
- You must be enrolled in a High Deductible Health Plan (HDHP) to contribute to an HSA.
- You must have an active HSA or FSA account with available funds.
- Understand your plan's specific rules for eligible expenses and reimbursement.
Understanding OTC CGM HSA FSA Eligibility Rules
The foundation for using tax-advantaged funds lies in IRS rules and plan specifics. This section breaks down the legal basis from the CARES Act and how it applies to your accounts.
Confirm the CARES Act Applies to Your Purchase
The CARES Act, passed in 2020, changed the rules permanently. Before this act, you needed a prescription to use FSA or HSA funds for over-the-counter medical products. Now, OTC items, including medical devices like CGMs, are qualified expenses without a prescription. This rule is active for the 2026 plan year and beyond.
Common mistake
Assuming all OTC items are automatically eligible. The item must still be for a medical purpose. General wellness items not intended to treat or prevent a specific condition may not qualify.
Pro tip
Bookmark the IRS Publication 502 and look for the section on the CARES Act changes. This is your authoritative source if you need to argue a case with your plan administrator.
Check Your Specific FSA or HSA Plan Documents
While the IRS sets the rules, your specific plan administrator (like WageWorks for your FSA or Fidelity for your HSA) enforces them. Some administrators may have a list of pre-approved items or require specific documentation. Log into your account portal and search for 'eligible expenses' or 'OTC.' Look for continuous glucose monitors, diabetes care supplies, or medical devices.
Common mistake
Not checking your plan's list and assuming it will be accepted. Some older plan documents might not be updated, leading to initial claim denials.
Pro tip
When you call, get the representative's name and a reference number for the conversation. If they say it's eligible, note this down. It helps if a reimbursement is later questioned.
Verify the Device is for a Qualified Medical Purpose
The IRS states that expenses must be for the 'diagnosis, cure, mitigation, treatment, or prevention of disease.' Using an OTC CGM to manage prediabetes, monitor blood sugar for metabolic syndrome, PCOS, or reactive hypoglycemia fits this definition. You do not need to be insulin-dependent.
Common mistake
Purchasing an OTC CGM for general biohacking or athletic performance optimization without an underlying medical condition. This gray area could risk an audit.
Pro tip
If you have a diagnosis like prediabetes from a doctor, keep that record in your files. It solidifies the medical purpose for the expense.
How to Purchase an OTC CGM with FSA or HSA Funds
Once eligibility is confirmed, you need to execute the purchase correctly. Follow these steps to ensure a smooth transaction and proper record-keeping.
Choose Your OTC CGM Provider and Plan
Compare the two main FDA-cleared options: Dexcom Stelo and Levels Lingo. As of 2026, Dexcom Stelo offers a monthly subscription for $89 ($1,068/year) or a 3-month plan for $84/month. Levels Lingo is $89/month or $249 for a 3-month supply. Consider your budget and sensor duration. Decide if you want a subscription or one-time purchases.
Common mistake
Not factoring in the total annual cost. A monthly $89 charge adds up to over $1,000, which may exceed your FSA balance if you didn't plan contributions accordingly.
Pro tip
If you have a 'use it or lose it' FSA, consider a larger one-time purchase of sensor packs before year-end instead of starting a subscription that will charge into the next year.
Use Your FSA/HSA Debit Card at Checkout
Go to the vendor's website (stelo.com or hellolingo.com). Add your chosen product to the cart. At checkout, use your FSA or HSA debit card as the payment method. These cards are typically Visa or Mastercard. The transaction should process normally. Ensure the billing address on file with your FSA/HSA provider matches the one you use for checkout to avoid declines.
Common mistake
The card gets declined because the merchant category code is not recognized. Online direct-to-consumer health tech companies sometimes use codes that FSA/HSA systems flag.
Pro tip
If your card is declined, try purchasing through an FSA-approved retailer like the FSA Store, Amazon (with the FSA/HSA filter enabled), or a major pharmacy website like Walgreens.com if they carry the product.
Submit for Reimbursement if Paying with a Personal Card
If you pay with a personal credit card, you must manually seek reimbursement. Log into your FSA or HSA provider's website. Find the 'Submit a Claim' or 'Request Reimbursement' section. You will need to upload a detailed receipt showing the date, merchant name, item purchased (e.g., 'Dexcom Stelo Sensor Kit'), and amount paid. The receipt must not show a balance due.
Common mistake
Submitting a vague receipt that just says 'subscription' or doesn't list the specific medical device. This can cause delays or denials.
Pro tip
Immediately after purchase, take a screenshot of the order confirmation page that shows all required details. This often works better than a credit card statement.
Keep Impeccable Records for Tax Time
The IRS may ask for documentation proving your HSA withdrawals were for qualified expenses. Keep all receipts, order confirmations, and any correspondence with the CGM company or your plan administrator for at least three years after filing your tax return. For an FSA, the plan administrator handles verification, but you should still keep records in case of an audit.
Common mistake
Deleting email order confirmations or losing paper receipts. Digital records are easier to store and search.
Pro tip
Create a dedicated folder in your email or cloud drive labeled 'Medical Expenses - Tax' for the year. Forward all related emails and save PDFs there immediately.
Maximizing Tax Savings and Managing Account Limits
Strategic use of your accounts can increase your savings. This section covers contribution planning and how to handle FSA rollovers versus HSA rollovers.
Plan Your Contributions Around the Cost
For 2026, know your limits. The FSA limit is $3,400 per employee. HSA limits are $4,400 for self-only and $8,750 for family coverage. If you want an OTC CGM costing about $1,068 annually, ensure you contribute at least that much. For an FSA, you must elect this amount during open enrollment. For an HSA, you can adjust contributions at any time as long as you stay under the annual limit.
Common mistake
Under-contributing to your FSA and then realizing you don't have enough to cover the CGM purchase, missing out on the tax break.
Pro tip
During open enrollment, add the estimated annual cost of the CGM plus any other expected expenses (contacts, dental work) to determine your ideal FSA election.
Understand FSA Carryover Rules vs. HSA Rollover
FSAs may allow a carryover of up to $680 into the next plan year, if your employer's plan offers this feature. Not all do. Alternatively, some plans offer a 2.5-month grace period. HSAs have no such limit; all unused funds roll over indefinitely and can be invested. This difference is critical for purchase timing. If your FSA has a December deadline, buy in December.
Common mistake
Assuming your FSA has a carryover and losing hundreds of dollars because it doesn't. Always verify your plan's specific rules.
Pro tip
If your FSA has a 'use it or lose it' rule with no carryover, schedule your OTC CGM purchase in the fourth quarter to use up remaining funds.
Calculate Your Exact Tax Savings
Estimate your savings based on your marginal tax bracket. If you are in the 25% federal tax bracket and a 5% state tax bracket, your combined rate is 30%. On a $1,068 OTC CGM purchase, your tax savings would be about $320. This makes your effective cost only $748. Use an online HSA tax savings calculator for a precise figure, factoring in FICA taxes if contributing through a payroll deduction.
Common mistake
Only considering federal income tax and ignoring state tax and FICA savings, which understates the total benefit.
Pro tip
Contributions to an HSA through payroll deduction also avoid the 7.65% FICA tax if done through a cafeteria plan. This adds significant savings that you don't get with post-tax contributions.
Avoiding Common Pitfalls and Audit Risks
Mistakes can lead to denied reimbursements or IRS penalties. Follow these steps to stay compliant and protect yourself.
Never Use Funds for Non-Eligible Family Members
You can only use your HSA or FSA for qualified medical expenses for yourself, your spouse, and your tax dependents. Purchasing an OTC CGM for a friend, a non-dependent adult child, or a parent you don't claim as a dependent is not allowed. The IRS defines dependents specifically. Using funds for ineligible persons can result in income tax plus a 20% penalty on the distribution.
Common mistake
Buying a CGM for an aging parent you support but do not claim as a dependent on your taxes. This is not a qualified expense.
Pro tip
Review the IRS rules for qualifying child and qualifying relative dependents each year if you plan to use HSA/FSA funds for family members.
Maintain Proof of Medical Purpose
While a prescription is not required for OTC CGMs, you should be able to demonstrate the medical purpose if audited. This could be a doctor's note discussing prediabetes management, lab results showing elevated A1C, or even a personal log tracking symptoms. The burden of proof is on you. Keep this documentation with your receipt, but you generally don't need to submit it upfront.
Common mistake
Having no supporting documentation at all. In an audit, you would have to rely solely on the receipt, which may not be sufficient.
Pro tip
If you have a conversation with your doctor about using a CGM, ask for a note in your after-visit summary that mentions it. This creates a dated medical record.
Reconcile Your HSA Distributions Annually
When you file your taxes, you will receive Form 1099-SA from your HSA trustee showing all distributions (withdrawals) for the year. You must report these on Form 8889. You are responsible for proving that distributions were for qualified expenses. Compare your 1099-SA to your saved receipts. Any distribution not matched to a qualified expense is taxable income plus a 20% penalty.
Common mistake
Forgetting to save receipts and then being unable to account for a distribution during tax preparation, leading to unnecessary penalties.
Pro tip
Each January, gather all your medical receipts from the prior year and match them to your HSA statements. Do this before you start your tax return.
Key Takeaways
- OTC CGMs are eligible for HSA and FSA funds without a prescription due to the CARES Act of 2020, but final approval depends on your plan administrator.
- Using pre-tax funds saves an estimated 20% to 30%, turning a $1,068 annual cost into an effective $748 to $818 expense.
- You can pay directly with an FSA/HSA debit card online, but be prepared to submit for reimbursement if the card is declined.
- FSAs may have a $680 carryover limit; HSAs allow indefinite rollover, affecting when you should make your purchase.
- Keep detailed receipts and proof of medical purpose for at least three years in case of an IRS audit.
- The OTC CGM HSA FSA eligibility rule applies to managing conditions like prediabetes and metabolic syndrome, not just diabetes.
Next Steps
Contact your FSA or HSA provider now to confirm they accept OTC CGM purchases under the CARES Act.
Calculate your required contribution increase to cover the annual cost of the device within your 2026 election.
Bookmark the product pages for Dexcom Stelo and Levels Lingo to compare current pricing and subscription options.
Pro Tips
Buy your OTC CGM subscription late in the year. Use current-year FSA funds, then the recurring charges in January will pull from next year's FSA, effectively using two years of funds for one annual subscription.
If your FSA/HSA debit card is declined online, the retailer's category code might be the issue. Try purchasing through a major pharmacy's website like Walgreens or CVS, which are almost always coded correctly for FSA/HSA cards.
Keep a digital copy of the CARES Act language (Section 3702) and a printout of the FDA clearance for your OTC CGM. This can help if your plan administrator questions the eligibility.
For maximum tax efficiency, contribute enough to your HSA to cover the annual cost of the OTC CGM. For 2026, the $4,300 self-only limit allows this easily, and the funds remain yours forever.
If you have both an FSA and HSA (Limited Purpose FSA), remember the FSA covers dental and vision. Use your HSA for the OTC CGM purchase to preserve your FSA for other eligible costs.
Frequently Asked Questions
Are over-the-counter CGMs like Dexcom Stelo really HSA and FSA eligible without a prescription?
Yes, due to the CARES Act of 2020. This law permanently expanded the definition of qualified medical expenses to include over-the-counter medications and medical devices purchased without a prescription. OTC CGMs fall under this category. However, your specific HSA provider or FSA plan administrator must accept the expense. While the IRS says they are eligible, some administrators may require extra documentation.
What's the difference between OTC and prescription CGM eligibility for HSA/FSA?
The main difference is documentation. For a prescription CGM like Dexcom G7, you typically need a doctor's prescription and sometimes a Letter of Medical Necessity for reimbursement. For an OTC CGM like Dexcom Stelo or Levels Lingo, no prescription is required under the CARES Act. You can purchase it directly. You should still keep your receipt for your records, but you won't need to submit medical documentation to justify the purchase as a qualified expense.
How much can I save on an OTC CGM using my HSA or FSA?
Your savings depend on your tax bracket. Using pre-tax funds typically yields a 20% to 30% discount. For example, the Dexcom Stelo annual subscription costs $1,068. If you're in the 25% combined tax bracket, using HSA or FSA funds saves you about $267. That brings your effective out-of-pocket cost down to roughly $801. This estimate does not include potential state tax savings, which could increase your benefit.
Can I use my FSA or HSA debit card to buy an OTC CGM online?
Usually, yes. Most OTC CGM sellers, like stelo.com or hellolingo.com, accept standard Visa or Mastercard debit cards. If your FSA or HSA provides such a card, you can use it at checkout. If the transaction is declined, it might be because the merchant category code isn't recognized as a medical provider. In that case, pay with a personal card and submit the receipt for reimbursement through your FSA or HSA provider's portal. Always save your detailed receipt.
What happens to my FSA funds for an OTC CGM if I don't use them all by year-end?
It depends on your plan's rules. The IRS allows FSA plans to offer a carryover of up to $680 into the next year, or a grace period of up to 2.5 months. You must check your specific plan details. If your plan does not allow carryover and you don't use the funds, you lose them. This 'use it or lose it' rule is a key reason to plan OTC CGM purchases before the year ends. HSAs have no such rule; funds roll over indefinitely.
If I'm not diabetic, can I still use HSA/FSA funds for an OTC CGM?
Yes. The IRS definition of a qualified medical expense is broad. It includes costs for the diagnosis, cure, mitigation, treatment, or prevention of disease. Using an OTC CGM for managing prediabetes, metabolic conditions like PCOS, reactive hypoglycemia, or general health monitoring fits this definition. You do not need a diabetes diagnosis. The device must be for a medical purpose, not general wellness or curiosity, but conditions like prediabetes are widely accepted medical reasons.
Will my health insurance cover any part of an OTC CGM?
Most standard health insurance plans do not cover OTC CGMs for non-diabetic or prediabetic users. These devices are designed for direct consumer purchase. This is precisely why FSA and HSA funds are so important for affordability. If you have a prescription for a CGM due to diabetes, your insurance might cover a traditional prescription CGM instead. For the OTC route, your FSA or HSA is likely your primary funding source.
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