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Thread: unicompartmental knee replacement

  1. #1

    Question unicompartmental knee replacement

    AAPC: Back to School
    Pt. has unicompartmental knee replacement several years ago. Dr. has that the unicompartmental knee replacement has failed & is doing a total knee replacement. Should this be coded 27447 for should we code a revision 27487?

    Joyce Burchett

  2. #2


    When my doctors do this conversion from a partial to a total knee replacement, I use 27447 with 22 modifier. This modifier will take care of the extra work done (removing prosthesis, I&D, etc.)

  3. #3

    Default unicompartmental knee replacement

    I did find an article from the Coding Institute that says we should use 27487 when you are converting a Unicompartmental to a total knee. I don't think it would be correct to bill 27447 with a modifer 22. CPT 27487 includes the work of removing the prosthesis & placing the new prothesis. Thanks for your answer though.


  4. #4


    i would use 27447 and 27488-51, since a total knee is not being revised.

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