Lichen planus
Chapter 12:Diseases of the skin and subcutaneous tissue
ICD-10 L43 is a used to indicate a diagnosis of lichen planus.
Lichen planus is a chronic inflammatory skin condition characterized by the development of purplish, itchy, flat-topped papules, often found on the wrists, ankles, and lower back. The condition can also affect mucous membranes, leading to oral lichen planus, which presents as white patches or erosions in the mouth. The exact etiology of lichen planus remains unclear, but it is believed to involve an autoimmune response where the immune system mistakenly attacks the skin and mucosal cells. Disease progression can vary; some patients experience spontaneous resolution, while others may have persistent lesions that can recur over time. Diagnosis is primarily clinical, supported by a thorough history and physical examination. Skin biopsies may be performed to confirm the diagnosis and rule out other conditions. Differential diagnoses include psoriasis, eczema, and drug eruptions. Management typically involves topical corticosteroids, systemic immunosuppressants, or phototherapy, depending on the severity and extent of the disease. Regular follow-up is essential to monitor for potential complications, including the risk of squamous cell carcinoma in long-standing oral lichen planus.
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 covers various forms of lichen planus, including cutaneous lichen planus, oral lichen planus, and lichen planus of the scalp. It is important to note that each subtype may have different clinical presentations and management strategies.
L43 should be used when the diagnosis of lichen planus is confirmed, particularly when the lesions are characteristic and the condition is chronic. It is essential to differentiate it from other similar skin conditions like psoriasis (L40) or eczema (L30) based on clinical features.
Documentation should include a detailed patient history, physical examination findings, and any biopsy results if performed. Notes on the severity of symptoms, treatment responses, and follow-up care are also critical to support the use of L43.
