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Thread: Another Modifier 50 Question!

  1. #1

    Default Another Modifier 50 Question!

    AAPC: Back to School
    OK, So I have been reading through some of the modifier 50 threads, and while they somewhat answer my question, they don't quite do it.

    Biller posted charges for unlisted foot surgery (28899 x1) and then again for the what should have been for the assistant surgeon (28899.50 x1).

    I know that this is all wrong! It should really be (28899.50) and then (28899.50.80).

    My question is this.... should it be billed at 1 unit each or 2 units each? Because it is an unlisted code, I can't seem to find a bilateral indicator.

    Help!! Lisa

  2. #2
    Join Date
    Apr 2007
    Salt Lake City


    was the sugery performed on both feet with an assistant surgeon?
    Jenifer McPolin CPC, CPMA, RCC

  3. #3



  4. #4
    Join Date
    Apr 2007
    Harrisburg PA

    Default Billing Mod 50

    It really depends on the carrier.

    You really should check with your particular carriers, with that said if it is Medicare you would always bill with one unit and ensure the fee is doubled.


  5. #5
    Join Date
    Apr 2007
    Salt Lake City


    I agree with Cheryl
    Jenifer McPolin CPC, CPMA, RCC

  6. #6


    Thanks! I knew about Medicare, but the commercial carriers make it difficult.

    I am working with Harvard Pilgrim here in New England. I will have to reach out to a provider rep because everytime I try to discuss something like this with a rep, they say, "We can't tell you how to bill."

    Again... thanks so much!


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