Pulsating exophthalmos, left eye

This code signifies a condition where the left eye protrudes abnormally from the orbit, and this protrusion is observed to pulsate. This pulsation is typically synchronous with the patient's heartbeat, often indicating a vascular abnormality behind the eye.

Apply this code when documentation explicitly states "pulsating exophthalmos" affecting the left eye. This is commonly seen in cases of carotid-cavernous fistulas, orbital aneurysms, or other vascular lesions within the orbit. Supporting documentation should detail the laterality and the pulsatile nature of the exophthalmos.

• Ensure laterality is clearly documented (left eye).
• Distinguish from non-pulsating exophthalmos (H05.20-H05.25-) which indicates a different underlying etiology.
• Always code the underlying cause of the pulsating exophthalmos, if known, as a primary diagnosis when applicable.