If you pay the money directly to the facility, there is no dollar limit on how much you can effectively gift to benefit your mother for purposes of federal gift taxes. What’s more, this action may even entitle you to include the payment with your own medical expenses if you itemize deductions. As long as you pay more than half of your mother’s support of the year and meet certain other tests, you can treat this medical payment on behalf of your mother as your own (even if you can’t take a dependency exemption for her because her gross income is more than the allowable limit, which is $4,000 in 2015).
A fixed deduction allowed to every taxpayer, except those who may be claimed as a dependent by another person. Extra exemption deductions are allowed for a spouse on a joint return and for each qualifying dependent. A deduction of $3,400 is allowed for each exemption claimed on 2007 returns, but the deduction is phased out for certain high income individuals.