Unspecified acute conjunctivitis, left eye

This code signifies an acute inflammation of the conjunctiva in the left eye, where the specific causative agent (e.g., bacterial, viral, allergic) has not been identified or documented. Patients typically present with symptoms such as redness, irritation, discharge, and tearing in the affected eye.

Use this code when the physician's documentation clearly indicates acute conjunctivitis in the left eye, but the etiology remains undetermined or unspecified. This is appropriate for initial encounters where further diagnostic workup is pending or when the provider does not specify the type of conjunctivitis.

• Avoid using this code if the documentation specifies a bacterial, viral, allergic, or other specific type of acute conjunctivitis; instead, use the more specific code.
• Ensure the laterality (left eye) is clearly documented. If both eyes are affected and unspecified, a bilateral code would be more appropriate.
• If the conjunctivitis is chronic rather than acute, a different code from the H10.4- series should be selected.