Acute atopic conjunctivitis, left eye

This code describes an acute inflammatory condition of the conjunctiva in the left eye, specifically caused by an allergic reaction. It is characterized by sudden onset of symptoms such as itching, redness, swelling, and watery discharge, triggered by exposure to an allergen.

Use this code when documentation clearly indicates an acute allergic conjunctivitis affecting only the left eye. This diagnosis is typically supported by patient history of allergen exposure, acute onset of symptoms, and clinical examination findings consistent with allergic inflammation.

• Ensure laterality is accurately documented; do not use this code for bilateral or right eye involvement.
• Distinguish from other forms of conjunctivitis (e.g., bacterial, viral) based on clinical presentation and etiology.
• Look for documentation of "acute" to differentiate from chronic atopic conjunctivitis.