A66.3

What This Code Means

Hyperkeratosis of yaws is a skin condition caused by the yaws infection (a tropical disease spread by bacteria) that results in thickened, hardened patches of skin. This represents a specific manifestation of the yaws disease affecting the outer layer of the skin.

Coding Tips

• •Verify that the patient has a confirmed diagnosis of yaws (caused by Treponema pallidum subspecies pertenue) with documented hyperkeratotic skin lesions before assigning this code
• •This code should only be used when hyperkeratosis is specifically documented as a manifestation of yaws; do not use for hyperkeratosis from other causes