In a health insurance policy, riders can enhance coverage beyond what is provided in the base policy. The best time to opt for a rider is when the base plan does not cover a specific medical need. Reviewing your family history for hereditary conditions and opting for a particular rider in advance is wise. Only you can determine the most relevant riders for you, considering your family medical history. Riders like Outpatient Department (OPD) coverage and hospital cash can come in handy irrespective of family history, but if one has a family history of critical health conditions, the critical health rider is a must.