If the person qualifies as your dependent medical expenses for them are an itemized medical deduction but only if you itemize. You can only deduct an amount of total medical expenses greater than 7.5 percent of your AGI.
The cost of the Medical and Dental coverage purchased for your dependent can be included as a medical expense on Itemized deductions, Schedule A. This TurboTax link has instructions to enter the expense.
Thanks. Fortunately, I don't think medical expenses were that high.