Question: What is Quadrilateral Space Syndrome, and which ICD-9 code should I use to report it?
Codify Subscriber
Answer: Quadrilateral space syndrome (QSS) refers to the compression of the axillary nerve in the back of the patient’s shoulder. Sometimes the compression of the posterior circumflex artery can cause the symptoms in the same area, especially with overhead sports like throwing and swimming.
You’ll report compression of the axillary nerve using code 353.0 (Brachial plexus lesions).
ICD-10 Change: Under ICD-10, you’ll report G54.0 (Brachial plexus disorders) to describe this condition.