Our office has been billing the 87804 as a quantity of 1 until recently when I discovered our test are for both strains A&B. I have been billing for this and only changing the quantity and adding notes that it is for both A&B and the payer's have been paying on this. However, a colleague recently suggested I use a modifier with this as well but was not certain what modifier should be used. Is this correct, should a modifier be added, and if so, which one? Thanks so much for the help!
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You are correct on all counts. If the Physician orders both A & B then you can code for both.
Some commercial carriers will pay for both, some will not. I have had some success with written appeals in getting the second test paid.
87804QW AND 87804QW, 59 is the correct way to code.
Hope this helps!