Cost sharing describes how both you and your insurance company pay toward your health costs. You pay a portion for each type of service you get, such as seeing a doctor or filling a prescription. Depending on the type of health plan you have, you may pay your share of the costs as a:
Copayment, which is a fixed amount like $15 for a doctor's visit
Coinsurance, which is a percentage of the cost of care, such as 30% of the cost
Deductible, which is an amount you must spend on your care before your health plan pays anything toward your medical expenses.