White piedra

This code represents white piedra, a superficial fungal infection of the hair shaft. It is characterized by soft, white, or light-colored nodules or concretions that adhere to the hair, typically affecting the scalp, beard, mustache, or pubic hair. The infection is caused by yeasts of the genus Trichosporon.

Use this code when documentation confirms a diagnosis of white piedra, often identified by the presence of characteristic nodules on the hair shafts. This diagnosis is typically made clinically, sometimes supported by direct microscopic examination of affected hairs.

• Differentiate from black piedra (A36.1), which involves hard, dark nodules caused by Piedraia hortae.
• Ensure the documentation specifies "white" piedra to avoid confusion with other hair shaft infections.
• This code is typically a primary diagnosis unless it's a secondary finding to a more significant underlying condition.