Cicatricial alopecia [scarring hair loss] (L66)
ICD-10 code L66 covers cicatricial alopecia, a group of conditions causing permanent scarring hair loss. These codes help identify various types of scarring alopecia, including specific forms like lichen planopilaris and folliculitis decalvans, providing precise classification for treatment and documentation.
The ICD-10 code for cicatricial alopecia includes subcategories such as L66.0 for Pseudopelade, and L66.1 for lichen planopilaris, which also covers related terms like eczema of the scalp and frontal fibrosing alopecia. L66.2 codes for folliculitis decalvans, a scarring inflammation of hair follicles. Other notable codes include L66.3 for perifolliculitis capitis abscedens and L66.4 for folliculitis ulerythematosa reticulata, linked to keratosis pilaris variants. L66.81 identifies central centrifugal cicatricial alopecia, while L66.89 includes scarring alopecia due to infectious diseases or conditions like lepromatous scarring alopecia. Unspecified scarring hair loss falls under L66.9, encompassing causes like radiation alopecia or post-traumatic scarring. These codes specifically guide coding professionals in distinguishing types of scarring hair loss for accurate diagnosis and treatment planning.
Diseases of the skin and subcutaneous tissue (L00–L99)
Disorders of skin appendages (L60-L75)
L66 Cicatricial alopecia [scarring hair loss]
- L66.0 Pseudopelade
L66.1 Lichen planopilaris DELETED CODE
- L66.10 Lichen planopilaris, unspecified NEW CODE
- L66.11 Classic lichen planopilaris NEW CODE
- L66.12 Frontal fibrosing alopecia NEW CODE
- L66.19 Other lichen planopilaris NEW CODE
- L66.2 Folliculitis decalvans
- L66.3 Perifolliculitis capitis abscedens
- L66.4 Folliculitis ulerythematosa reticulata
L66.8 Other cicatricial alopecia DELETED CODE
- L66.81 Central centrifugal cicatricial alopecia NEW CODE
- L66.89 Other cicatricial alopecia NEW CODE
- L66.9 Cicatricial alopecia, unspecified
Cicatricial alopecia [scarring hair loss] (L66)
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Lipedema
Disorder of adipose tissue characterized by symmetric and bilateral enlargement of the lower extremities due to abnormal deposition of SUBCUTANEOUS FAT often in obese women. It is associated with HEMATOMA, pain and may progress to secondary LYMPHEDEMA which is known as lipolymphedema.
