I am a Radiology coder and am looking for clarification on choosing a primary diagnosis. When a study (XR, CT, MR, etc) is done and the only finding which might be relevant to the reason for the exam is non-specific or abnormal, do I code the abnormal finding or the reason why the test was ordered? For example, a chest xray is ordered because the patient has a cough. The only finding on the xray is groundglass opacities in both lungs. Would I use 793.19 or 786.2, or both? Thanks