Amyloid pterygium of unspecified eye

This code describes a specific type of pterygium characterized by amyloid deposition within the conjunctival and corneal tissue. It represents an abnormal growth on the conjunctiva that can extend onto the cornea, with the distinguishing feature being the presence of amyloid. This condition can lead to visual impairment and irritation.

Use this code when documentation explicitly states "amyloid pterygium" without specifying laterality. This diagnosis is typically made following histopathological examination of excised tissue or based on clinical suspicion with supporting findings. Ensure the medical record clearly indicates the presence of amyloid within the pterygium.

• Do not use this code if the laterality (right or left eye) is documented; instead, choose the more specific code for the affected eye.
• Distinguish this from other forms of pterygium (e.g., H11.00- for unspecified pterygium) which do not involve amyloid deposition.
• Consider co-occurring conditions such as conjunctivitis or corneal involvement, and code them separately if documented.