Co-payment is the part amount that you have to pay from your pocket for medical treatment and medication while your insurance company will pay the remaining amount. Co-pay policies are more applicable to senior citizen health insurance policies in India. While you would be paying just a part of it, majority would be paid by the insurer. The co-pay fees vary from one insurer to another. You would have to check your policy document to see if your senior citizen health plan has the co-pay option. Note that co-pay is different from co-insurance. The difference between co-pay and co-insurance is that in co-insurance the insurer and the insured person get into a contract where each party has to agree to the percentage of the total cost to be paid. Whereas, in co-pay, the insured person has to pay a fixed amount for various healthcare services and treatments.