Tax reform has lowered the threshold.
If you itemize, you should note the reduced medical deduction threshold for 2018. This year, you can deduct qualified medical expenses exceeding 7.5% of your adjusted gross income. Next year, the threshold for the medical expense deduction returns to 10% of AGI. (The Tax Cuts & Jobs Act of 2018 also allowed the 7.5% threshold to apply retroactively to the 2017 tax year.)1