Your health insurance deductible is the amount you have to pay out-of-pocket for covered services before your insurance begins to pay. It doesn’t include premiums, or costs that aren’t covered by your plan.
Once you meet your deductible your plan will pay it’s share of your coinsurance.
Under Obama Care Major Medical plans must meet certain cost sharing requirements and can’t have deductibles higher than out-of-pocket maximum limits which are $6,600 for an individual and $13,200 for a family in 2015.
Tax credits won’t lower your deductibles, but both Cost Sharing Reduction subsidies and Medicaid will. Your deductible can never be higher than your out-of-pocket maximum.