Ercp 43274 and the use of xs modifier

MMTHEISS

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I have a couple of denial from Medicare. ERCP was done and 43274(stent placed) x 3. I billed 43274, 43274x2units with XS modifier.

The denial is for frequency of 43274. Has the use of XS for ERCP's been changed? Is there is a publication that I am missing?


Thank you for help.

Margaret
 
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