CPT® Code 87220

The CPT® Code 87220 refers to a diagnostic procedure known as tissue examination by KOH slide, specifically targeting samples obtained from skin, hair, or nails. This examination is performed to identify the presence of fungi or ectoparasite ova or mites, such as those responsible for scabies. In this procedure, a sample of the affected tissue is prepared on a wet slide, which may or may not include the application of a fluorescent dye. The prepared slide is then examined under a microscope, allowing for the detailed observation of any fungal elements, eggs of parasites, or mites that may be present. Mites, in particular, are small parasitic insects that can cause various skin conditions, and their identification is crucial for accurate diagnosis and treatment. This procedure is essential in dermatology and other medical fields where skin, hair, and nail infections or infestations are suspected.