ICD-10 Code L49.9 – Exfoliation due to erythematous condition involving 90 or more percent of body surface (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L49.9 – Exfoliation due to erythematous condition involving 90 or more percent of body surface
What it is
This code identifies widespread skin peeling caused by an erythematous condition affecting 90% or more of the body surface. Use it when the documentation clearly describes exfoliation with this extent of involvement.
Clinical signs
Typical findings include diffuse redness followed by marked scaling or shedding of the skin. Clinical features vary; refer to documentation for the underlying erythematous disorder and the extent of body surface involvement.
When to use this code
Use L49.9 when the record states exfoliation due to an erythematous condition and specifies involvement of 90% or more of body surface. You should code from the documented extent, not from assumptions about severity. If the percentage is not recorded, check documentation.
Do not use for
Do not use this code for localized peeling, unspecified dermatitis, or exfoliation without an erythematous cause. Check documentation if the condition is better described by a different skin disorder or if body surface involvement is not confirmed.
Coding tip
Verify both the cause and the documented body surface extent before assigning L49.9.