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ICD Hub / Diseases of the visual system (H00–H59) / 9A01.20 - Hordeolum externum
ICD-11

ICD-11 Codes
for 9A01.20 - Hordeolum externum
Teodor Jurukovski January 1, 1970
Fact checked by: Teodor Jurukovski
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Understanding Hordeolum Externum (ICD-11 Code 9A01.20)

Hordeolum externum, identified by ICD-11 code 9A01.20, is an acute, painful infection affecting the eyelash follicle. This condition, commonly known as an external stye, typically results from a bacterial infection, most frequently Staphylococcus aureus. It involves the sebaceous glands associated with the eyelash follicle, leading to inflammation and discomfort at the eyelid margin.

Recognising the Signs of an External Stye

An external stye (hordeolum externum) typically presents as a tender, red, and painful lump or bump located on the outer edge of the eyelid, near the eyelashes. Other common symptoms may include:
  • Eyelid swelling, which can sometimes affect the entire eyelid.
  • A feeling of soreness or itching.
  • Eye tearing.
  • Sensitivity to light.
  • Crusting along the eyelid margin.
  • A sensation that there is a foreign object in the eye.

Factors Contributing to Hordeolum Externum

The primary cause of hordeolum externum (9A01.20) is a bacterial infection, often Staphylococcus aureus, within the eyelid's oil-producing glands or eyelash follicles. These glands help lubricate the eye's surface. Several factors can increase the likelihood of developing an external stye:
  • A history of previous styes.
  • Inflammation of the eyelids, such as blepharitis.
  • Certain skin conditions, including acne, rosacea, or seborrheic dermatitis (dandruff).
  • Conditions like diabetes.
  • Dry skin.
  • Periods of hormonal fluctuation.
  • Elevated cholesterol levels.

Diagnosing Hordeolum Externum

Healthcare professionals diagnose hordeolum externum (9A01.20) through a clinical examination of the eyelid. The diagnosis is typically made based on the characteristic appearance of the lesion and a review of the patient's reported symptoms. Visual acuity and other aspects of eye health may also be assessed.

Managing External Styes

Most cases of hordeolum externum resolve spontaneously within one to two weeks. Management strategies focus on alleviating discomfort and promoting healing:
  • Warm Compresses: Applying a warm, moist cloth to the affected eyelid for 10-15 minutes, several times a day, is a primary treatment. Some find using warm green tea bags beneficial due to potential antibacterial properties.
  • Eyelid Hygiene: Gently cleaning the eyelid margin with a mild, diluted soapy solution (e.g., baby shampoo and water) or using commercial eyelid wipes can help.
  • Avoidance: It is crucial not to squeeze or attempt to pop the stye, as this can worsen the infection. Rubbing or touching the eyelid should also be avoided. Makeup and contact lens use should be suspended until the condition has fully healed.
  • Medical Intervention: If symptoms do not improve after 48 hours of home care, or if the condition worsens, medical advice should be sought. Treatment may include prescription antibiotic ointments or eye drops, oral antibiotics for more severe infections, or, in some instances, a minor surgical procedure to drain the stye.

Alternative Names for Hordeolum Externum

Hordeolum externum (ICD-11 code 9A01.20) is widely recognised by several other terms. Common synonyms include external stye, stye, and simply sty. It is a specific type of hordeolum, distinct from hordeolum internum (internal stye).

Billing and Reporting for ICD-11 Code 9A01.20

The ICD-11 code 9A01.20, representing Hordeolum externum, is a billable and reportable diagnosis code used in healthcare settings for documentation and billing purposes. Accurate coding ensures proper medical record-keeping and facilitates reimbursement processes for healthcare providers.

Frequently asked questions

What is the ICD-11 classification meaning of 9A01.20?
9A01.20 represents Hordeolum externum, defined as an acute focal infection involving the eyelash follicle and associated glands, typically presenting as a boil discharging pus at the eyelid margin.
What is the distinction between ICD-11 codes 9A01.20 and 9A01.21?
9A01.20 is used for Hordeolum externum, while 9A01.21 is used for Hordeolum internum.
When should the ICD-11 code 9A01.2Z be used for Hordeolum?
Code 9A01.2Z, Hordeolum, unspecified, should be used when the documentation does not specify whether the hordeolum is external or internal.
Can additional details be coded with 9A01.20 Hordeolum externum in ICD-11?
Yes, ICD-11 supports post-coordination for 9A01.2 Hordeolum to add detail such as laterality (e.g., left, right, bilateral) and the specific infectious agent.
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