Medicare denying lab and x-rays

MarilynS

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This is a Family Practice. All of the sudden I am getting denials for such codes as 93000 ( EKG)and 71020 ( Chest x-ray). The denial is N265, N286-- Missing or invalid provider #. Up until now my #'s have been correct on my claims. We have changed nothing in our practice. I have called Medicare and they are no help. Has something changed?? Is there anyone else having this problem??
 
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