It is extremely important for you to go over all your medical bills with a fine-tooth comb, because there will be errors and those errors can really cost you. Often, you will believe that your medical insurance should pay for something, and they won't, instead they kick it back to you, and you think; "oh my gosh, this is really expensive." Yes, it is, as all medical costs these days seem outrageous and for a family on a budget this could kill you. Literally, as it can cause excess stress, anxiety and helplessness. Who knows maybe that's the plan, then you can purchase more drugs for depression and heart meds?
Sometimes the medical insurance companies are obligated but try to pull a fast one on you or your older policy, has provisions for things that the newer policies do not. Therefore, you need to check your policy against what the insurance company refuses to pay for. In fact, you can ask anyone who has had a bit of medical care, how much over charging goes on, and you will be astounded, as it happens all the time.
It is therefore imperative that you carefully go over your bill item-by-item to check and see what is truly your obligation, and what your insurance company is to pay for. Also, be weary that often the doctor's office will make convenient mistakes, yes, generally in their favor, and sometimes it adds up to thousands of dollars. So, before you get all stressed out over your medical bills, look it over and see what you can find, perhaps you will save those 1000s of dollars and keep you and your family out of the poor house.