When imaging test findings are equivocal for pneumonia (for example, a report of infiltrate vs. atelectasis, or a report stating opacity may be pneumonia or may represent congestive heart failure), the first step is to look for subsequent imaging test results that provide a definitive result. If subsequent imaging findings are definitive for pneumonia and these findings are persistent, the equivocal imaging is eligible for use. If subsequent imaging tests show rapid clearing or show findings that are definitive for something other than pneumonia, the equivocal imaging is not eligible for use. Note: The subsequent imaging tests do not have to occur in the IWP but must be temporally related to the equivocal imaging findings. In the event subsequent imaging test results are not available or do not provide further delineation one way or another, then clinical correlation can be used to clarify the equivocal imaging. Clinical correlation requires that there is documentation in the medical record that the physician has prescribed antimicrobial treatment for pneumonia. Note: The purpose of clinical correlation is to clarify that equivocal imaging findings are representative of pneumonia. Clinical correlation does not have to be documented within the IWP, but it must be documented around the time of the equivocal imaging. If subsequent imaging results indicate the finding is definitively attributed to something other than pneumonia, clinical correlation cannot be used.