An EOB is not a bill. An EOB is a document from your insurance company describing how your plan covers a test or service, and how much of the associated fees are paid for by your plan. An EOB will show if there is any additional amount not covered, for which you may be responsible, but is not a bill and is not necessarily the amount you will owe. The EOB typically precedes your bill. The billing statement is from PerkinElmer and will identify the out of pocket responsibility owed.