Allergic contact dermatitis, unspecified cause
ICD-10 L23.9 is a billable code used to indicate a diagnosis of allergic contact dermatitis, unspecified cause.
Allergic contact dermatitis (ACD) is a delayed hypersensitivity reaction that occurs when the skin comes into contact with an allergen, leading to inflammation. The clinical presentation typically includes erythema, pruritus, and vesicular lesions, which may develop into crusted plaques. The anatomy involved primarily includes the epidermis and dermis, where the immune response is triggered by sensitized T-cells. Disease progression can vary, with acute cases presenting within 24-48 hours of exposure, while chronic cases may develop over weeks to months with persistent symptoms. Diagnostic considerations include a thorough patient history, identification of potential allergens, and, when necessary, patch testing to confirm the diagnosis. It is essential to differentiate ACD from other dermatological conditions such as irritant contact dermatitis and atopic dermatitis, which may have overlapping symptoms but different underlying mechanisms and management strategies.
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
L23.9 covers allergic contact dermatitis without specifying the allergen. It includes reactions to various substances such as cosmetics, plants, metals, and chemicals, provided the specific allergen is not identified.
L23.9 should be used when the cause of allergic contact dermatitis is unknown or unspecified. If the allergen is identified, a more specific code should be selected to ensure accurate representation of the condition.
Documentation should include a detailed patient history, clinical findings, and any relevant test results such as patch tests. Clear notes on the absence of identified allergens are also critical to support the use of L23.9.
