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Thread: Modifier gh for diagnostic mammograms

  1. #1

    Smile Modifier gh for diagnostic mammograms

    AAPC: Back to School
    Hello Radiology Coders, and Happy Friday!

    I have a question about the proper use of Modifier GH (diagnostic mammogram converted from screening mammogram the same day). Would it be coded as a diagnostic mammogram with the modifier GH appended, which sounds correct? Would we not need a new referring doctor's order for this since the original referral requests screening mammogram?
    And if a corrected referral was not obtained, would we need to just code it as a 77057 for screening mammogram and not append any GH modifier??

    Any and all help would be appreciated.
    Claudia K, CPC

  2. #2


    Hello my name is Tiensa, I was wondering if you ever got a response to your post.

  3. #3


    If the order is for a screening mammogram - then a screening is done and billed. If images show a need for additional views, then we also bill a diagnostic with a modifier GG.

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