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L20.9 — Atopic dermatitis, unspecified
L20.9
What this code means
Atopic dermatitis (eczema) is a chronic itchy, inflamed skin condition linked to allergy and asthma, often starting in childhood.
Also called: atopic dermatitis, eczema.
When this code is used
Used for atopic dermatitis when the type is not specified.
Where it sits in ICD-10-CM
Code L20.9 belongs to Chapter 12: Diseases of the skin and subcutaneous tissue, which covers codes L00–L99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.
Related symptoms
Related anatomy
Watch: related videos
Frequently asked questions
What is ICD-10-CM code L20.9?
L20.9 is the ICD-10-CM diagnosis code for “Atopic dermatitis, unspecified”. Atopic dermatitis (eczema) is a chronic itchy, inflamed skin condition linked to allergy and asthma, often starting in childhood.
When is code L20.9 used?
Used for atopic dermatitis when the type is not specified. It belongs to Chapter 12 of ICD-10-CM (Diseases of the skin and subcutaneous tissue).
This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.