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Thread: UNI Knee Revised to Total Knee

  1. #1
    Join Date
    Apr 2007

    Default UNI Knee Revised to Total Knee

    AAPC: Back to School
    We have a patient who had a unicompartmental knee arthroplasty. The DJD progressed to the other compartment & we had to take out the UNI knee and convert to a total knee. How to code? Any suggestions would be appreciated.

  2. #2


    Reference: AAOS Bulletin, October 2003: http://www2.aaos.org/aaos/archives/b...oct03/code.htm


    A patient had a unicompartmental knee arthroplasty using code 27446. One year later, the patient had a revision of the hemiarthroplasty to a full arthroplasty. What codes would best represent this removal of the old compartment and then placement of a new total knee arthroplasty component?


    Normally, this would be coded 27487. The revision code includes the removal of the old prosthesis. However, depending upon documentation and the situation, this could also be coded 27447 and 27488 -51.

    Note: This is not a revision of a total knee replacement. Except for removal of a partial tibial tray and femoral metal runner, the procedure is the same work as a primary total knee."

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