You can enter it as a Medical Expense.

If you are using TurboTax Online, search for Medical Expense on the Tax Home page. From there you can select the option for Private medical plans.

If you are using TurboTax Desktop in EasyStep mode, use the Find tool to search for Medical Expense Profile. From there you can select the option for Private medical plans and other claims.   

If you are using TurboTax Desktop in Forms mode, look for the “Medical” worksheet.