Pilar cyst
ICD-10 L72.11 is a billable code used to indicate a diagnosis of pilar cyst.
Pilar cysts, also known as trichilemmal cysts, are benign, fluid-filled sacs that typically develop on the scalp. They arise from hair follicles and are characterized by a keratin-filled cavity lined by stratified squamous epithelium. Clinically, these cysts present as smooth, firm, and mobile nodules, often skin-colored or slightly yellowish, and can vary in size from a few millimeters to several centimeters. They are usually asymptomatic but may become inflamed or infected, leading to discomfort. The anatomy involved primarily includes the epidermis and dermis, where the cyst forms from the outer root sheath of hair follicles. Disease progression is generally benign, with pilar cysts rarely leading to complications unless they rupture or become infected. Diagnostic considerations include a thorough clinical examination and, if necessary, imaging studies to differentiate them from other skin lesions. A biopsy may be performed for definitive diagnosis in atypical cases.
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
L72.11 specifically covers pilar cysts, which are benign cystic lesions arising from hair follicles, primarily on the scalp. It does not include other types of cysts such as sebaceous or epidermoid cysts.
L72.11 should be used when the diagnosis is confirmed as a pilar cyst, particularly when the cyst is located on the scalp. If the cyst is sebaceous or epidermoid, then L72.0 or L72.9 should be considered.
Documentation should include a detailed clinical description of the cyst, its location, size, and any symptoms experienced by the patient. Photographic evidence and notes on the treatment plan may also be beneficial.
