CPT® Code 96902

Microscopic examination of hairs plucked or clipped by the examiner (excluding hair collected by the patient) to determine telogen and anagen counts, or structural hair shaft abnormality

The CPT® Code 96902 refers to the microscopic examination of hairs that have been plucked or clipped by the examiner, specifically excluding any hair that has been collected by the patient. This procedure is performed to determine the counts of hair in the telogen and anagen phases, as well as to identify any structural abnormalities in the hair shaft. The examination involves a detailed analysis of the hair roots, which are assessed microscopically to ascertain the growth phase of each hair strand. Hair growth is categorized into three distinct phases: anagen, telogen, and catagen. The anagen phase represents the active growth stage of hair, where approximately 85-90% of individual hairs are typically found. The telogen phase is characterized by hair that is resting and preparing to fall out, accounting for about 10-15% of hairs. The catagen phase is a short transitional stage between anagen and telogen, with less than 1% of hairs in this phase at any given time. Additionally, the procedure allows for the diagnosis of hair shaft disorders by examining clipped hair for abnormalities such as bubble hair, beaded hair, or bamboo hair, all of which can lead to hair fragility and breakage. A comprehensive written report detailing the microscopic findings is generated following the examination, providing essential information for diagnosing hair growth disorders and structural hair shaft abnormalities.