While looking for health insurance plans, what does "coinsurance" mean when it's at 0%?

I'm looking for an HMO Health Insurance plan for my boyfriend through eHealthInsurance.com. I've found a plan that is affordable for us, but it says "0% coinsurance" - I'm not sure if this means that we're responsible for 0% or the insurance company is responsible for 0%! It also has a $0 deductible as well. show more I'm looking for an HMO Health Insurance plan for my boyfriend through eHealthInsurance.com. I've found a plan that is affordable for us, but it says "0% coinsurance" - I'm not sure if this means that we're responsible for 0% or the insurance company is responsible for 0%! It also has a $0 deductible as well.
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