Dermatophytosis of nail

This code represents a fungal infection of the nail, commonly known as onychomycosis, caused by dermatophytes. It results in discolored, thickened, and brittle nails, often affecting the toenails more frequently than fingernails.

Use this code when documentation clearly indicates a dermatophyte-induced fungal infection of the nail. This diagnosis is typically supported by clinical examination findings and may be confirmed by laboratory tests such as KOH preparation or fungal culture.

• Differentiate from other nail disorders not caused by dermatophytes, such as psoriasis of the nail or bacterial infections.
• Ensure the documentation specifies "dermatophytosis" to avoid confusion with other types of onychomycosis.
• Consider additional codes for any associated complications or underlying conditions, if documented.