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L01.1 ICD-10 – Impetigo Unspecified
L01.1 is an ICD-10 code for impetigo, unspecified. This highly contagious bacterial skin infection commonly affects children, causing itchy blisters and honey-colored crusts.
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L01.1 is an ICD-10 code for impetigo, unspecified. This highly contagious bacterial skin infection commonly affects children, causing itchy blisters and honey-colored crusts.
What does ICD-10 code L01.1 mean?
The ICD-10 code L01.1 stands for impetigo, unspecified. Impetigo is a common, highly contagious bacterial infection of the superficial layers of the skin. It is primarily caused by the bacteria Staphylococcus aureus and/or Streptococcus pyogenes (Group A streptococci). The code L01.1 is used when no more specific form of impetigo has been documented or differentiated.
Causes and Risk Factors
Impetigo develops through direct bacterial infection of the skin. Transmission occurs via:
- Direct skin contact with an infected person
- Shared items such as towels or clothing
- Minor skin injuries, insect bites, or cuts that serve as entry points for bacteria
Groups at particular risk include:
- Children aged 2 to 6 years
- Individuals in close community settings (e.g., daycare centers, schools)
- People with weakened immune systems
- Patients with pre-existing skin conditions such as atopic dermatitis
Symptoms
Typical signs of impetigo include:
- Red, itchy patches, most commonly on the face (around the mouth and nose) or on the limbs
- Thin-walled blisters or pustules that rupture easily
- Honey-yellow to brownish crusts forming after the blisters break open – the hallmark sign of the condition
- Mild swelling of nearby lymph nodes
- Fever or general malaise in rare cases
Diagnosis
The diagnosis is usually made clinically, meaning the physician identifies the condition based on its characteristic appearance. In unclear cases or when the infection does not respond to treatment, a swab of the affected skin area may be taken for microbiological analysis to identify the exact pathogen and its antibiotic sensitivity.
Treatment
Treatment depends on the severity of the infection:
Topical Therapy
For mild, localized impetigo, antibiotic creams or ointments are used, for example containing fusidic acid or mupirocin. Gentle, regular cleaning of the affected skin supports healing.
Systemic (Oral) Therapy
In cases of widespread infection, failure of topical treatment, or complications, oral antibiotics are prescribed. Commonly used agents include cephalosporins, amoxicillin/clavulanate, or flucloxacillin.
Hygiene and Infection Control
Because impetigo is highly contagious, hygiene measures are essential: regular handwashing, avoiding sharing personal items, and temporarily keeping infected children away from communal settings until the risk of transmission has passed.
Prognosis
With appropriate treatment, impetigo resolves well, typically within 7 to 10 days. Without treatment, it can spread or, in rare cases, lead to complications such as a deeper skin infection (ecthyma) or post-infectious kidney disease (post-infectious glomerulonephritis).
References
- World Health Organization (WHO): ICD-10 International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Chapter XII Diseases of the Skin and Subcutaneous Tissue (L00-L99), L01 Impetigo.
- Nast A. et al. – Guidelines for the treatment of bacterial skin infections, AWMF Register No. 013-038, German Dermatological Society (DDG), 2021.
- Hartman-Adams H. et al. – Impetigo: Diagnosis and Treatment. American Family Physician, 2014; 90(4):229-235.
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