Medical expenses incurred for senior citizens

Yes, If he doesn't have Mediclaim insurance policy, you can consider these expenses under health treatment expenses u/s. 80D IT act

Medical expenses for senior citizens (80D):
• Sec 80D allows a deduction for medical expenditure on a senior citizen (self, spouse, or parents) if no health insurance policy covers them: up to Rs 50,000 per category (old regime). Expenses must be paid other than in cash.
• Routine medicines (sugar, BP tablets, vitamins) bought with doctor prescripttions qualify as medical expenditure.
• Keep bills and prescripttions.