Follicular lymphoma, unspecified, spleen

This code signifies a diagnosis of follicular lymphoma where the specific subtype is not documented, and the primary or sole site of involvement is the spleen. Follicular lymphoma is a slow-growing (indolent) non-Hodgkin lymphoma originating from B-lymphocytes.

Use this code when medical record documentation confirms follicular lymphoma affecting the spleen, but the specific grade or subtype (e.g., grade I, II, III) is not specified. This is appropriate when the spleen is identified as the primary or only site of disease.

• Ensure documentation explicitly states "follicular lymphoma" and "spleen involvement."
• Avoid using this code if a more specific subtype or grade of follicular lymphoma is documented; instead, choose the appropriate C82.0-C82.8 code.
• If other sites are involved, consider additional codes for those sites, and review sequencing guidelines for primary vs. secondary malignancy.