Without getting too deep into details, be careful what you infer from that page/chart. "Managed care" and "balance billing" in that context have specific meanings that may not necessarily be apparent to the patient/policy holder. It's becoming less and less common to be under a policy where this would apply. In most cases, you are on the hook for the difference between the negotiated rate and the coverage amount (note that the insurance doesn't always pay 100% of the negotiated rate; they may pay 0%). Your best bet is to read your Explanation of Benefits (EOB) that the carrier sent you for each claim. If you think you're getting screwed by the provider, your insurance company will help with that. If you're getting screwed by the insurance company, contact your state.