What Is Coinsurance On A Health Insurance Plan? 
Coinsurance is the amount of the bill you share with the insurance company , typically after your deductible has been satisfied . Most commonly you will see this as 80/20 -LRB- can be 50/50 , 70/30 , 90/10 and 100/0 -RRB- , whereas the insurance company pays 80 % and you pay 20 % . Your portion will be capped . This is known as Maximum out of Pocket . 