Other types of follicular lymphoma, spleen

This code signifies a diagnosis of follicular lymphoma that does not fit into the more common categories (e.g., grades 1, 2, 3, or diffuse) and specifically involves the spleen. It indicates a primary or secondary splenic involvement by a less common or unspecified subtype of follicular lymphoma.

Use this code when documentation specifies follicular lymphoma of an "other" or "unspecified" type, and the spleen is explicitly identified as an involved site. This typically applies when pathology reports confirm follicular lymphoma but do not provide a specific grade (1-3) or state it is diffuse, and imaging or biopsy confirms splenic involvement.

• Ensure the documentation clearly states "follicular lymphoma" and explicitly mentions "spleen" as an involved site.
• Verify that the type of follicular lymphoma is not classifiable as grade 1, 2, 3, or diffuse, which would lead to more specific codes.
• Sequence this code after the primary malignancy if the splenic involvement is metastatic, or as the primary diagnosis if the spleen is the initial or sole site of this specific follicular lymphoma type.