Is Digital Thermometer HSA/FSA Eligible?
Basic diagnostic tool, no LMN needed.
How the rule applies
A thermometer is a basic diagnostic tool for detecting fever. It is a straightforward eligible expense, with no prescription or letter required.
What to keep for your records
Keep the receipt with the product name and date.
Watch out for
Infrared, ear and forehead models all count. A smart home gadget with a thermometer feature may not, so choose a product sold as a thermometer.
Where to buy it HSA/FSA-eligible
Pay with your HSA or FSA card directly, or buy elsewhere and save the receipt to submit for reimbursement.
Shop on FSA Store → Shop on HSA Store →Related in Medical Devices & Equipment
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HSA-Eligible Expenses
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Letters of Medical Necessity
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HSA/FSA Reimbursement & Documentation
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This ruling applies the HSA/FSA account rules (IRC §223, IRS Pub. 969), the medical-care definition they rely on (IRC §213(d), IRS Pub. 502) and any later statutory change or IRS guidance listed above. It is for informational purposes only. Eligibility can vary slightly by plan administrator — when in doubt, confirm with yours before purchasing.