What are the benefits available in respect of expenditure incurred on account of medical treatment of specified diseases on treatment of a senior citizen?
​​​​​​​​​ section 80D​DB of the Income-tax Law gives various provisions relating to tax benefits available on account of expenditure on medical treatment of specified diseases. Click the following link to know about details of section 80DDB which covers the details of special benefits under section 80DDB ​available to a senior citizen. Check page 8 topic "Deduction in respect of expenditure on medical treatment of specified diseases [ section 80DDB​]"

https://www.incometaxindia.gov.in/tutorials/20.%20tax%20benefits%20due%20to%20health%20insurance.pdf