2025 ICD-10-CM code L25.9
Unspecified contact dermatitis of unspecified cause.
The medical necessity of using L25.9 is based on the physician's clinical judgment and the patient's symptoms.
Diagnosis and treatment of the contact dermatitis.
In simple words: This code refers to a skin rash caused by contact with something, but the specific cause is unknown.
Unspecified contact dermatitis, unspecified cause. This code is used when the cause of the contact dermatitis is not known or not specified.
Example 1: A patient presents with a rash on their hands, but they are unsure of the cause. After testing for other known causes of contact dermatitis, the cause remains unknown. L25.9 is used., A patient develops a rash on their face after using a new cosmetic product. Patch testing is negative for all tested allergens. L25.9 is used., A construction worker presents with a rash on their arms. They work with various materials, and it is impossible to determine the specific cause. L25.9 is used.
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