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Thread: Q4 Modifier

  1. #1
    Join Date
    Apr 2007

    Default Q4 Modifier

    AAPC: Back to School
    Does anyone know when I need to add the Q4 modifier to lab tests? Our office recently received denials from commerical payers that stated they did not recoginize the modifier (Q4). I tried to contact our medicare carrier but they could not answer and sent my question to another tier. I did find this descprition on line:
    A Q4 modifier is required for accurate claims processing of laboratory, radiology, and ultrasound interpretations by any provider other than the attending physician.

    Is this the best description of this modifier?


  2. #2

    Default Q4 modifier

    I know this questions was asked over 3 years ago, but it has now come up in our clinic. Does anyone know when this modifier is to be used on lab codes? I see the modifier is still an active modifier, but what does the description refer to "Svc exempt?

    Thank you for assistance with this.

    Cindy M, CPC:

  3. #3

    Default Q4

    I use the Q4 modifier on my claims to signify that they are the donor's claim for transplants. I have no idea if this helps you

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