Hordeolum internum right eye, unspecified eyelid

This code describes an internal hordeolum, also known as an internal stye, affecting the right eye. An internal hordeolum is an acute bacterial infection of the meibomian glands within the tarsal plate, presenting as a painful, red, and tender nodule on the inner surface of the eyelid.

Assign this code when documentation specifies an internal hordeolum located in the right eye, without further detail regarding the specific eyelid (upper or lower). This diagnosis is typically made upon physical examination, noting the characteristic localized swelling and tenderness on the conjunctival surface of the right eyelid.

• Ensure documentation clearly specifies "internal" hordeolum and "right eye."
• Do not confuse with external hordeolum (stye), which involves the glands of Zeis or Moll.
• If the specific eyelid (upper or lower) is documented, a more specific code should be used.