From your post, I have understood the following:
Your company pays the Mediclaim policy premium for the employee. Your company wishes to give the option of covering the spouse and children to the employee. However, the premium charged for the spouse and children has to be borne by the employee and not the company.
On the above understanding, I offer my views.
Premium Calculation Options
Generally, insurance companies quote premiums on the following basis:
a) Sum insured for individuals (Employee, Spouse & Children). For example, the Employee, Spouse & Children may be covered for a sum insured of Rs. 2,00,000 each. In such a case, you can seek the breakup of the insurance premium for the Spouse & Children and recover it from the employee.
b) The sum insured can be a floater policy for Rs. 2,00,000 among the family members (Employee, Spouse & Children). In such a case, obtaining a breakup of the premium amount for Spouse & Children could be difficult in my opinion.
As option a) will be easy to administer, I would recommend that you take this option, though the premium may be marginally higher in option a).
The advantage of option a) is even after the employee quits the organization, he/she can continue the policy coverage for himself/herself and family members.
I followed this in an organization, and employees were thankful for this.
Regards,
MVK