Should I pay first and fix it later?

In many cases it is better to understand the mismatch first, especially if the amounts are materially different.

What documents should I keep together?

Keep the EOB, the provider bill, and any itemized or claim reference details together for review.

What to Do If Your EOB Does Not Match Your Bill

Pause before paying, compare service dates and key amounts, and organize the mismatch so you know whether to follow up with the provider, insurer, or both.