Cutaneous autosensitization

This code represents a dermatological condition characterized by a secondary, generalized eczematous eruption resulting from an allergic reaction to endogenous substances released from a primary, often localized, inflammatory skin lesion. It is an autoimmune-like response where the body reacts to its own skin components.

Use this code when documentation clearly indicates a widespread eczematous rash that is a secondary reaction to a primary skin condition, such as stasis dermatitis, fungal infection, or contact dermatitis. The physician's notes should describe the primary lesion and the subsequent generalized eruption attributed to autosensitization.

• Ensure documentation explicitly links the generalized rash to an autosensitization phenomenon, not just a spreading dermatitis.
• Code the underlying primary skin condition first, as it is the etiology of the autosensitization.
• Avoid using this code for simple widespread dermatitis without evidence of an autosensitization mechanism.