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L57.0 — Actinic keratosis
L57.0
What this code means
Actinic keratosis is a rough, scaly patch on sun-damaged skin that is precancerous and can occasionally become squamous cell carcinoma.
Also called: actinic keratosis, solar keratosis.
When this code is used
Used for actinic keratosis.
Where it sits in ICD-10-CM
Code L57.0 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
Frequently asked questions
What is ICD-10-CM code L57.0?
L57.0 is the ICD-10-CM diagnosis code for “Actinic keratosis”. Actinic keratosis is a rough, scaly patch on sun-damaged skin that is precancerous and can occasionally become squamous cell carcinoma.
When is code L57.0 used?
Used for actinic keratosis. 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.