Acquired ichthyosis

This code represents a group of skin disorders characterized by dry, scaly, or thickened skin that develops later in life, rather than being present at birth. It is typically a secondary manifestation of an underlying systemic disease, medication, or malignancy, leading to impaired skin barrier function and desquamation.

Use this code when documentation indicates a patient presents with ichthyosis that is not congenital. This diagnosis is often supported by a dermatologist's assessment, biopsy results, and a thorough medical history ruling out a genetic origin. It frequently co-occurs with conditions like hypothyroidism, renal failure, sarcoidosis, or certain cancers.

• Always review the patient's medical history to differentiate acquired from congenital forms; the "Excludes1" note is critical.
• Code any underlying systemic condition or medication causing the acquired ichthyosis as a primary diagnosis, if applicable, following sequencing guidelines.
• Ensure documentation clearly specifies "acquired" or describes the onset as non-congenital to justify using this code.