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ICD Hub / Diseases of the visual system (H00–H59) / 9A01.21 - Hordeolum internum
ICD-11

ICD-11 Codes
for 9A01.21 - Hordeolum internum
Teodor Jurukovski January 1, 1970
Fact checked by: Teodor Jurukovski
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Understanding Hordeolum Internum

Hordeolum internum, identified by ICD-11 code 9A01.21, is an acute infection affecting a meibomian gland within the eyelid. This condition, often referred to as an internal stye, occurs when the gland's normal secretion becomes blocked, leading to inflammation and potential suppuration. It is typically caused by bacteria, most commonly Staphylococcus aureus. While it can resolve on its own, it may sometimes predispose individuals to the development of a chalazion.

Recognizing the Signs of an Internal Stye

Patients experiencing hordeolum internum often present with noticeable symptoms affecting the eyelid. These can include:
  • Pain and tenderness localized to the affected area.
  • Visible swelling and inflammation on the inner aspect of the eyelid.
  • In some cases, discharge may occur onto the conjunctival surface of the eye or, less commonly, through the skin of the eyelid.

Factors Contributing to Hordeolum Internum

The primary cause of hordeolum internum is the infection and blockage of a meibomian gland. These glands are responsible for producing the oily layer of the tear film. When their ducts become obstructed, secretions can build up, creating an environment conducive to bacterial growth, predominantly from Staphylococcus aureus.

Alternative Names for 9A01.21

This condition is known by several terms in clinical practice and patient communication. Common synonyms and patient-friendly terms for the ICD-11 code 9A01.21 (Hordeolum internum) include:
  • Internal stye
  • Acute meibomitis
  • Meibomian gland abscess
  • Internal hordeolum

Managing Hordeolum Internum

Treatment for hordeolum internum focuses on reducing inflammation and clearing the infection. Key management strategies include:
  • Applying warm compresses to the affected eyelid several times a day to help promote drainage.
  • Maintaining good eyelid hygiene.
  • For persistent or severe cases, a healthcare provider may prescribe antibiotic ointments or oral antibiotics.
  • It is important to distinguish hordeolum internum from a chalazion (ICD-11 code 9A02.0), which is a non-infectious obstruction of the meibomian gland.

Coding and Documentation for Hordeolum Internum

Accurate documentation and coding are essential for billing and record-keeping. The official ICD-11 code for Hordeolum internum is 9A01.21. When reporting this diagnosis, specificity is often required, including details on laterality (e.g., left, right, unspecified) and the specific anatomical location on the eyelid (e.g., upper eyelid, lower eyelid margin). Documentation may also include the identified infectious agent, such as Staphylococcus aureus. This ICD-11 code for hordeolum internum is reportable for medical billing purposes.

Frequently asked questions

What is the ICD-11 classification meaning of Hordeolum internum (9A01.21)?
In ICD-11, Hordeolum internum (9A01.21) is classified as a specific type of infectious disorder of the eyelid, characterized by a focal acute pyogenic infection of a meibomian gland.
How can Hordeolum internum be further specified in ICD-11 coding?
Hordeolum internum can be post-coordinated with extension codes to specify laterality (e.g., left, right, bilateral) and specific anatomical details of the eyelid involved. It can also be post-coordinated with infectious agents.
How does ICD-11 differentiate Hordeolum internum from other hordeolum classifications?
ICD-11 differentiates Hordeolum internum (9A01.21) by its specific classification as an infection of the meibomian gland, distinguishing it from other categories within Hordeolum, such as Hordeolum externum (9A01.20) and Hordeolum, unspecified (9A01.2Z).
Under what circumstances should the unspecified code for Hordeolum be used in ICD-11?
The unspecified code for Hordeolum (9A01.2Z) is used in ICD-11 when the clinical documentation does not specify whether the condition is an internal or external hordeolum.
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