Hordeolum externum right upper eyelid

This code describes an acute, localized infection of the sebaceous glands of Zeis or Moll at the margin of the right upper eyelid, commonly known as an external stye. It typically presents as a painful, red, and swollen bump on the eyelid.

Use this code when documentation specifies an external hordeolum affecting the right upper eyelid. This diagnosis is supported by clinical findings of a tender, erythematous nodule on the outer surface of the eyelid margin.

• Differentiate from internal hordeolum (chalazion) which involves the meibomian glands.
• Ensure laterality and eyelid (upper/lower) are clearly documented for accurate coding.
• Do not confuse with blepharitis, which is a more generalized inflammation of the eyelid margins.