Ring corneal ulcer, right eye

This code describes a severe, circular corneal ulceration affecting the right eye. This type of ulcer is characterized by an inflammatory infiltrate that forms a ring-like pattern within the corneal stroma, often indicating a serious infection or autoimmune process. It can lead to significant vision impairment and potential corneal perforation.

Use this code when documentation specifies a "ring corneal ulcer" or "annular corneal ulcer" in the patient's right eye. This diagnosis is typically made by an ophthalmologist based on slit-lamp examination findings. Supporting documentation should detail the location (right eye) and the characteristic ring-shaped morphology of the ulcer.

• Ensure the documentation clearly specifies "right eye" to avoid laterality errors.
• Distinguish from other types of corneal ulcers (e.g., central, marginal) which have different codes.
• Always code any underlying cause or associated infectious agent if documented (e.g., bacterial, fungal, viral keratitis).