Skip to content
My WebMD Sign In, Sign Up

Health Care Reform:

Health Insurance & Affordable Care Act

Back to ACA Health Insurance Terms List


Coinsurance is the amount of money you must pay for a health service, such as a doctor's appointment or a prescription. It's a percentage of the total cost of care. For instance, you may have a 20% coinsurance. If a doctor's visit costs $100, then you pay $20. Your health plan pays $80. You must pay your deductible before the coinsurance rate applies.

Under the Affordable Care Act, health plans cannot charge coinsurance for some services intended to help prevent you from getting a serious illness. For instance, your health plan cannot charge coinsurance for certain cancer screenings or vaccines.

WebMD Definition

Health Insurance Terms

Your State's Insurance Marketplace

Get informed about plans, benefits and costs.

From WebMD
URAC: Accredited Health Web Site HONcode Seal AdChoices