Deductible
The amount you owe for health care services your health insurance or plan covers before your health insurance or plan begins to pay. For example, if your deductible is $1000, your plan won't pay anything until you've met your $1000 deductible for covered health care services subject to the deductible. The deductible may not apply to all services.
Out-of-Pocket Max
The most you pay during a policy period (usually a year) before your health insurance or plan begins to pay 100% of the allowed amount. This limit never includes your premium, balance-billed charges or health care your health insurance or plan doesn’t cover. Some health insurance or plans don’t count all of your co-payments, deductibles, coinsurance payments, out-of-network payments or other expenses toward this limit.
Coinsurance
Your share of the costs of a covered health care service, calculated as a percent (for example, 20%) of the allowed amount for the service. You pay coinsurance plus any deductibles you owe. For example, if the health insurance or plan's allowed amount for an office visit is $100 and you've met your deductible, your coinsurance payment of 20% would be $20. The health insurance or plan pays the rest of the allowed amount.