Stevens-Johnson synd-tox epdrml necrolysis overlap syndrome

This code represents a severe, life-threatening mucocutaneous reaction characterized by features of both Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN). It involves widespread epidermal detachment, often exceeding 10% but less than 30% of the body surface area, accompanied by mucosal involvement. This condition is typically drug-induced and requires immediate medical intervention.

Use this code when documentation clearly indicates a diagnosis of SJS/TEN overlap syndrome, signifying a presentation with characteristics of both conditions. This diagnosis is typically made by a dermatologist or critical care physician based on clinical presentation, extent of skin detachment, and often a history of recent drug exposure. Documentation should specify the overlap nature of the syndrome.

• Differentiate carefully from SJS (L51.1) and TEN (L51.2) based on the percentage of body surface area involved in epidermal detachment.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter.
• Look for documentation of causative agents (e.g., adverse drug reactions) and code them additionally if identified.