ICD-10 Code L49.4 – Exfoliation due to erythematous condition involving 40-49 percent of body surface (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L49.4 – Exfoliation due to erythematous condition involving 40-49 percent of body surface
What it is
This code identifies exfoliation, or widespread skin peeling, caused by an erythematous condition affecting 40-49% of the body surface. Use it when the documentation specifies both the cause and the extent of involvement.
Clinical signs
Typical findings include diffuse redness with visible scaling or peeling over nearly half of the body. Clinical features vary; refer to documentation for the underlying erythematous condition and recorded body surface percentage.
When to use this code
Use L49.4 when the provider documents exfoliation due to an erythematous disorder and estimates body surface involvement at 40-49%. It is appropriate when the record clearly links the peeling to the erythematous process. Check documentation if the percentage is not stated.
Do not use for
Do not use this code for exfoliation without a documented erythematous cause or when the affected body surface falls outside 40-49%. If the chart is nonspecific, use the broader code only if supported by documentation.
Coding tip
Verify both the cause and the body surface range before assigning L49.4.