Cutaneous follicle center lymphoma, unspecified site

This code identifies a specific type of non-Hodgkin lymphoma originating from follicle center B-cells, primarily affecting the skin. It is characterized by the proliferation of atypical lymphoid cells within the dermis and subcutaneous tissue, forming nodules or plaques. This diagnosis indicates that the primary site of the lymphoma is the skin, without further specification of the exact anatomical location.

Apply this code when documentation confirms a diagnosis of cutaneous follicle center lymphoma, and the specific anatomical site on the skin is not documented or is unknown. This diagnosis is typically established through skin biopsy and subsequent histopathological examination. Use this code when the physician explicitly states "cutaneous follicle center lymphoma, unspecified site."

• Ensure documentation clearly specifies "cutaneous" to differentiate from systemic follicle center lymphoma.
• Avoid using this code if a more specific anatomical site (e.g., "cutaneous follicle center lymphoma of the trunk") is documented; instead, use the appropriate subcategory.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is explicitly identified as the underlying cause or complication.