1. There will be cases for which sufficient evidence is not available to adequately assign stage (Examples: Patient expires before workup is completed, patient refuses procedure, and patient is limited to workup due to age or simultaneous contraindicating condition).
  2. Assign "unstageable" or "not recorded" reluctantly. Contact the physician to see if there is more information about the case which is not in the record (diagnostic studies performed prior to admission, and so forth).
  3. If sufficient information does not exist, do not guess. There is no choice but to mark the case as unstageable.