If such care is medically necessary, as prescribed and certified by a licensed health care provider, then it can be treated as a deductible medical expense if you itemize deductions. For 2016, only out-of-pocket medical expenses in excess of 7.5% of your adjusted gross income can be deducted. Starting in 2017, the AGI threshold rises to 10% unless Congress changes the law.
A tax triggered if certain tax benefits reduce your regular income tax below the tax computed on Form 6251 for AMT purposes.