Charges that were never yours to pay

The statement asked for $530. The Explanation of Benefits said the patient owed $118.

The gap was $412. The contractual write-off on that same claim was also $412, to the dollar.

That is not a coincidence and it is not a negotiation. An in network provider signs a contract agreeing to accept the allowed amount and to erase the difference. When the statement is built from the original charge instead of the allowed amount, that erased discount lands on the patient's bill.

This is the third family: the charge is real, the math holds, the plan was applied, and the money still belongs to somebody else.

The check takes one subtraction. Take what the provider is asking for, subtract the responsibility on the EOB, and see whether what is left matches the contractual adjustment. Two conditions before you raise it: every line should be affirmatively in network, and the two figures should match closely rather than roughly.

Also in this family: amounts labeled not covered that nobody has explained, and penalties for a prior authorization the provider was responsible for obtaining.

A note on tone. This is almost never anybody being clever. It is usually an automated process that started from the wrong number. Describe the discrepancy, name the document, ask for a correction.

General information, not legal, medical or financial advice. Every plan is different, so check the details against your own plan documents.