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Thread: Help with CPT 20985??

  1. #1

    Default Help with CPT 20985??

    AAPC: Back to School
    One of our provider did a arthoplasty on the knee CPT 27447 and also used CPT 20985 (computer assisted surgical navigational procedure) it's also an add on code. My question is do you need a Modifier with the 20985???

    Please help!!

    I have a few of these sitting at my desk not knowing what to do!!!

  2. #2


    No, you do not need a modifier, it is an add on code. We bill, for instance, 27447 RT and 20985. (no modifier)

    Hope that helps!


  3. #3
    Join Date
    Apr 2007
    Greater Pittsburgh


    Unless you own the equipment (vs. hospital) I use a -26 modifier for professional component.
    jdemar, CPC, CMA

  4. #4
    Join Date
    Apr 2007


    Unfortunately, Modifiers 26 and TC are not valid with CPT 20985....so you would not use a 26 modifier. You may add RT or LT though...
    Hope that helps!

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