Tuberculous episcleritis

This code signifies inflammation of the episclera, the outermost layer of the sclera, specifically caused by a Mycobacterium tuberculosis infection. It represents a localized ocular manifestation of tuberculosis, often presenting with redness, pain, and irritation of the eye.

Use this code when documentation clearly indicates episcleritis with a confirmed tuberculous etiology. This typically involves a positive tuberculin skin test, interferon-gamma release assay, or identification of M. tuberculosis from ocular tissue or fluid samples in a patient presenting with episcleral inflammation.

• Always ensure the documentation explicitly links the episcleritis to tuberculosis; otherwise, a non-specific episcleritis code should be used.
• Sequence this code after the underlying active tuberculosis code (e.g., A15.-) if the systemic infection is also being treated.
• Do not confuse with scleritis (inflammation of the sclera itself) or other forms of non-tuberculous episcleritis.