Question: Encounter notes indicate that the provider treated a patient whose final diagnosis was cervical sympathetic paralysis. How should I code this encounter? Michigan Subscriber Answer: This patient suffers from Horner’s syndrome, which is also known as cervical sympathetic dystrophy or paralysis. You might also see this syndrome called Bernard(-Horner) syndrome. On the claim, report G90.2 (Horner’s syndrome) to represent the patient’s diagnosis. More on condition: Horner’s syndrome is a condition that affects the nerves in the face and eye. It is characterized by a combination of symptoms, including: Horner’s syndrome occurs when there is damage or disruption to the sympathetic nerve pathway that controls these functions. The condition can be caused by various underlying factors, such as: