Your insurance could provide you with that information. You can ask for a summary plan description that will outline what is covered. The two items you would want to make sure you know is your deductible and your out of pocket maximum.
The deductible is the amount of $ you have to pay before the insurance kicks-in. You will have to pay the full amount of the deductible.
After that, most plans have co-insurance. That is where you split the cost with the insurance companies. An 80/20 co-insurance is normal. You will have to pay your portion until you hit the out of pocket max.