What is the icd-9 code for chest xray orthopnea?

There is no ICD-9 code specifically for chest x-ray orthopnea. Orthopnea is a symptom, not a diagnosis, and is not typically coded in ICD-9. Chest x-ray findings related to orthopnea may be coded under various other ICD-9 codes, such as those for pulmonary edema, congestive heart failure, or other respiratory conditions.