Wiki 87798

We are a physician office lab location 11 Podiatry billing fungal nail cultures but we are getting denied by palmetto GBA Virginia. Other podiatrist are getting paid as rendering but we are not any ideas what I am doing wrong?
 
I have an outpatient visit where it is send back because of 87798, lab is for Influenza A&B. so there is 2 cpt 87804, and using mod 59 on first one and mod 59 with QW on second cpt. please help me if this is correct or not. thank you, Helen
 
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