Hordeolum internum right upper eyelid

This code represents an internal hordeolum, commonly known as a stye, affecting the upper eyelid of the right eye. An internal hordeolum is an acute bacterial infection of a Meibomian gland within the tarsal plate, presenting as a painful, red, and swollen nodule on the conjunctival surface of the eyelid.

Use this code when documentation specifies an internal hordeolum located on the right upper eyelid. This typically occurs when a patient presents with localized pain, tenderness, and swelling on the inner aspect of the upper eyelid. Supporting documentation should clearly indicate the laterality (right) and the specific eyelid (upper) involved.

• Differentiate from external hordeolum (stye of Zeis or Moll gland), which has a different code.
• Ensure documentation specifies "internal" and the exact location (right upper eyelid) to avoid unspecified codes.
• Do not confuse with chalazion, which is a sterile, chronic granulomatous inflammation of a Meibomian gland.