The 3rd character refers to the root operation or the objective of the procedure.


  • XNH - Insertion

    Putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part

  • XNS - Reposition

    Moving to its normal location, or other suitable location, all or a portion of a body part — The body part is moved to a new location from an abnormal location, or from a normal location where it is not functioning correctly. The body part may or may not be cut out or off to be moved to the new location

  • XNU - Supplement

    Putting in or on biological or synthetic material that physically reinforces and/or augments the function of a portion of a body part