Hyperkeratosis due to yaws

This code represents a skin condition characterized by abnormal thickening of the outer layer of the epidermis (hyperkeratosis) that is specifically caused by yaws, a chronic tropical infection. Yaws is a treponemal disease, similar to syphilis, primarily affecting the skin, bones, and joints. The hyperkeratotic lesions are a late manifestation of the disease.

Use this code when documentation clearly indicates hyperkeratosis as a sequela or manifestation of a diagnosed yaws infection. This typically applies to patients presenting with chronic, thickened skin lesions, particularly on the palms and soles, in regions endemic for yaws, and where laboratory confirmation of yaws is present or strongly suspected.

• Always sequence the underlying yaws infection code (e.g., 102.0-102.9) as the primary diagnosis, with this code as a secondary diagnosis to specify the skin manifestation.
• Differentiate from other causes of hyperkeratosis; ensure documentation explicitly links the hyperkeratosis to yaws.
• Avoid using this code for hyperkeratosis due to other infectious or non-infectious etiologies.