If your plan has a $100 deductible and 30 percent co-insurance and you use $1,000 in services, you'll pay the $100 plus 30 percent of the remaining $900, up to your out-of-pocket maximum. You may find plans with no co-insurance requirements, some with 20/80 or 50/50 coinsurance, or other combinations.May 16, 2017read more >>