under which section of Income Tax Act

Section 17(2) ... "perquisite" includes ---

Sub-sec (viii).... point no. (v) any sum paid by the employer in respect of any expenditure actually incurred by the employee on his medical treatment or treatment of any member of his family [other than the treatment referred to in clauses (i) and (ii)]; so, however, that such sum does not exceed fifteen thousand rupees in the previous year;