Reading Your Explanation of Benefits for a Diagnostic Test

An Explanation of Benefits is not a bill — it's your insurer's summary of what was billed, what they're covering, and what's left for you. The number that actually matters is the 'allowed amount': the negotiated rate your insurance has agreed to with that provider, which is often dramatically lower than the 'amount billed' the provider first submitted. Bills from the provider sometimes arrive before the EOB is finalized, and the two don't always match — that gap is one of the most common sources of real billing errors, so it's worth holding onto both and comparing them line by line before paying anything. If you're billed more than expected because an out-of-network provider was involved at an in-network facility, federal surprise-billing protections may apply and limit what you actually owe — this is worth raising directly with your insurer's billing department if it happens.