Pregnant US Coding Diagnosis Order Question

DSMYTH

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If a pregnant comes in for her 20 week Fetal Survey US and a Low Level Placenta Previa is found, what would the correct coding order be? Reason for Exam: Z36, Primary Dx: Z36 and Secondary Dx: O44.02, or would the Low Lying Placenta now become the Primary Dx ? Thanks
 

mitchellde

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The O codes have sequencing priority and always go first listed. You would not code the Z36 code.. See the excludes 1 note. You will need to add the Z3A code for the weeks of gestation.
 
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