Health Savings Accounts (HSAs) and Flexible Spending Accounts (FSAs) both let you pay for eligible medical devices with pre-tax dollars, but they behave very differently once the money is set aside. HSA funds belong to the individual, carry over year to year with no expiration, and require enrollment in a high-deductible health plan. FSA funds are owned by the employer's plan, generally must be used within the plan year or a short grace period, and are available to anyone whose employer offers one, regardless of deductible type. Both accounts require a device to qualify as a medical expense under IRS rules, and programs like Truemed can help verify that a purchase, such as a MedMassager therapeutic massager, meets that standard.
If you're weighing HSA vs FSA for medical devices this year, the decision usually comes down to timing and how much control you want over unspent funds. Maybe you're eyeing a therapeutic massager for chronic foot pain, or a blood pressure monitor your doctor recommended, and you're trying to figure out which account actually covers it.
The rules aren't identical, and using the wrong account at the wrong time can mean losing money you already set aside. This guide breaks down the structural differences that matter most to a device buyer: rollover rules, who's eligible to open each account, contribution timing, and documentation requirements, plus how a qualification service like Truemed fits into the process.
What Counts as an Eligible Medical Device
Both HSAs and FSAs pull their eligibility rules from the same source: Internal Revenue Code Section 213(d), which the IRS also summarizes in Publication 502. A device qualifies if it's used primarily for the diagnosis, treatment, mitigation, or prevention of a medical condition, rather than for general health or fitness. That distinction is where most confusion starts, because plenty of products sit in a gray area.
IRS Rules That Apply to Both Accounts
Items purely for general wellness, like a standard gym membership or a basic vitamin, typically don't qualify without additional justification. Devices with a clear medical purpose usually clear the bar without much friction. Common examples include:
- Blood pressure monitors and glucose meters
- CPAP machines and related supplies
- TENS units and other pain-management devices
- Orthopedic braces and compression equipment
- Therapeutic massagers used for circulation support or muscle recovery, such as therapeutic foot massagers designed for people managing chronic foot pain
Why Documentation Matters More for Some Devices
Devices with an obvious primary medical use, like a CPAP machine, rarely require extra paperwork. Devices that could plausibly serve either a medical or a general wellness purpose, including massagers, often need a Letter of Medical Necessity (LMN) from a licensed healthcare provider confirming the purchase is tied to a specific condition. A qualification service helps here, since it verifies eligibility before you spend HSA or FSA dollars rather than after the fact.
HSA vs FSA for Medical Devices: Core Differences
The rules for what you can buy are largely the same across both accounts. What differs is the structure around the money itself, and that structure has real consequences for someone timing a device purchase. Three differences drive most of the decision:
- Rollover: HSA funds carry over indefinitely, while FSA funds usually don't.
- Eligibility: HSAs require a high-deductible health plan, FSAs require an employer that offers one.
- Timing: HSA contributions can flex during the year, FSA elections lock in
