My interpretation of IRS publication 502 says yes since I will be paying for the expense when we are married... "You can include medical expenses you paid for your spouse. To include these expenses, you must have been married either at the time your spouse received the medical services or at the time you paid the medical expenses."
While you can deduct those expenses as a medical deduction if you itemize, you can’t use HSA distributions for medical expenses incurred before marriage.
In Publication 969, the IRS clarifies that you can withdraw tax-free money from your HSA to pay for qualified medical expenses for:
Publication 969 states; "You can receive tax-free distributions from your HSA to pay or be reimbursed for qualified medical expenses you incur after you establish the HSA."
My HSA was established before the medical expenses were incurred. Just not before marriage.
Qualified medical expenses are those expenses that would generally qualify for the medical and dental expenses deduction. These are explained in Pub. 502, Medical and Dental Expenses.
Is there somewhere in publication 969 that would clarify this more?
Note from Pub 969:
In Publication 969, the IRS clarifies that you can withdraw tax-free money from your HSA to pay for qualified medical expenses for:
When the expenses were incurred they were not incurred by you or your spouse.