Lichen planus, unspecified
ICD-10 L43.9 is a billable code used to indicate a diagnosis of lichen planus, unspecified.
Lichen planus is a chronic inflammatory condition that primarily affects the skin and mucous membranes. Clinically, it presents as purplish, itchy, flat-topped papules, often found on the wrists, ankles, and lower back. The lesions can also appear in the oral cavity, leading to painful erosions. The exact etiology remains unclear, but it is believed to involve an autoimmune response, possibly triggered by factors such as medications, infections, or stress. The disease can progress with episodes of exacerbation and remission, and while it is generally self-limiting, it can persist for months to years. Diagnosis is primarily clinical, supported by a thorough history and physical examination. Skin biopsy may be performed to confirm the diagnosis, revealing a band-like infiltrate of lymphocytes at the dermal-epidermal junction. Differential diagnoses include psoriasis, eczema, and other papulosquamous disorders. Understanding the clinical presentation and progression is essential for effective management and treatment planning.
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
L43.9 covers unspecified lichen planus, which may include various presentations such as cutaneous lichen planus and lichen planus affecting mucous membranes, without specifying the site or type.
L43.9 should be used when the specific type of lichen planus is not documented or when the clinician has not specified the affected area, differentiating it from more specific codes like L43.0 or L43.1.
Documentation should include a detailed clinical description of the lesions, patient history, any treatments attempted, and results from any diagnostic tests such as biopsies.
