Sezary disease, unspecified site

This code signifies Sezary disease, a rare and aggressive form of cutaneous T-cell lymphoma (CTCL) characterized by widespread erythroderma, generalized lymphadenopathy, and the presence of malignant T-cells (Sezary cells) in the skin, lymph nodes, and peripheral blood. It represents the systemic manifestation of this specific type of lymphoma without specifying a particular anatomical site of involvement.

Use this code when the medical record clearly documents a diagnosis of Sezary disease, and no specific primary or secondary site of involvement is identified or needs to be separately coded. This code is appropriate for initial diagnosis or ongoing management when the disease is generalized or the site is not further elaborated.

• Do not use this code if a more specific site of Sezary disease is documented (e.g., skin, lymph nodes).
• Ensure documentation explicitly states "Sezary disease" to support this diagnosis.
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter.