Coinsurance is the percentage you pay for covered health care services. It's part of the total cost of medical or hospital services you receive. If your plan has a deductible, you pay your coinsurance for covered services once the deductible is met. For example, some policies allow you to pay a small percentage of the total bill when you visit the doctor - this percentage is what is known as "coinsurance." Generally, if you pick a plan with a lower coinsurance amount, your premium (the monthly amount you pay) will be higher. If you pick a plan with a higher coinsurance amount, your premium will be lower.
In the example below, you visited the doctor and the total bill was $100. Notice that if you have a plan with a higher coinsurance amount (25%), then your monthly premiums are generally lower, but you pay a little more when you visit the doctor's office ($25.00 instead of $10.00).
| Premium Range: | Lower Premium | Higher Premium |
| Doctor Bill: | $100.00 | $100.00 |
| Coinsurance: | 25% | 10% |
| BCBSF pays: | $75.00 | $90.00 |
| You pay: | $25.00 (25% of $100) | $10.00 (10% of $100) |