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Wiki Why add a modifier 51 to CPT 36478?

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Asheville, NC
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I see where a coder is applying a 51 modifier to cpt 36478. This is when it is billed with 37765 or 37766.
I cannot find any info on this. The 51 cuts the WRVUs to 50% so I am curious as if the 51 is necessary.
It might be a coding change that I have missed a long the way,
Any info on this would be greatly appreciated.

Best,
Annette
 
Multiple surgery reduction rules have been in effect for many years. Primary procedure pays 100%, second and additional procedures pay 50 or 25%. depending on payer
Most payers don't want the -51 to be applied (CMS for example), they will append the -51 themselves to lower value procedures to apply the reduction
 
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