Cutaneous follicle center lymphoma, intra-abd lymph nodes

This code signifies a diagnosis of cutaneous follicle center lymphoma that has metastasized or originated in the lymph nodes located within the abdominal cavity. It specifies a primary skin lymphoma subtype that has spread beyond its initial cutaneous presentation to an internal nodal site.

Apply this code when documentation confirms a diagnosis of cutaneous follicle center lymphoma with involvement of intra-abdominal lymph nodes, typically identified through imaging (e.g., CT, MRI) and biopsy. This code is appropriate when the intra-abdominal nodal involvement is a confirmed site of disease.

• Ensure documentation clearly states "cutaneous follicle center lymphoma" and specifies "intra-abdominal lymph nodes" as the site of involvement.
• Do not confuse with primary follicular lymphoma of intra-abdominal lymph nodes (C82.0x) or other non-cutaneous lymphomas.
• Sequence this code as the primary diagnosis when the intra-abdominal nodal involvement is the focus of the encounter, or as a secondary diagnosis when treating the underlying cutaneous lymphoma with documented intra-abdominal spread.