multiple times

  1. R

    Wiki 86235 to be billed with modifier 59,91 or QW

    As a diagnostic test lab, we are supposed to bill 86235 8 times for a test. My question is which modifier I should use? I have heard mixed info about using 91,59 or QW. Can some one please advise, which modifier I can use and why there are different modifiers? Thanks in advance, Amer
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