Trichiasis without entropion left upper eyelid

This code describes a condition where the eyelashes on the left upper eyelid are misdirected and grow inwards, rubbing against the surface of the eye. This inward growth of eyelashes, known as trichiasis, occurs without the eyelid margin itself turning inward (entropion). It can cause irritation, foreign body sensation, and corneal damage.

Use this code when documentation specifies trichiasis affecting the left upper eyelid, and explicitly states the absence of entropion. This is appropriate for patients presenting with symptoms of ocular irritation, redness, or foreign body sensation localized to the left upper eyelid, and clinical examination confirms misdirected lashes without eyelid inversion.

• Ensure documentation clearly specifies "without entropion" to differentiate from codes where entropion is present.
• Laterality (left) and eyelid (upper) are crucial; verify these details in the clinical notes.
• Do not confuse with codes for entropion with trichiasis, or codes for other eyelid disorders.