Follicular lymphoma grade III, unsp, lymph nodes mult site

This code signifies a specific type of non-Hodgkin lymphoma, follicular lymphoma, that is classified as grade III, indicating a more aggressive form. The "unspecified" aspect refers to the specific subtype within grade III not being further detailed. The disease is present in multiple lymph node regions throughout the body.

This code is appropriate when documentation confirms a diagnosis of follicular lymphoma, grade III, without further subtyping, and states involvement of lymph nodes in more than one anatomical region. Supporting documentation typically includes pathology reports confirming follicular lymphoma and grade, along with imaging or clinical notes detailing multi-site lymph node involvement.

• Ensure the pathology report explicitly states "grade III" for follicular lymphoma; avoid assuming grade based on clinical aggressiveness alone.
• "Multiple sites" refers to involvement in two or more lymph node regions, not just multiple nodes within a single region.
• Differentiate from localized follicular lymphoma (C82.20-C82.27) and other grades of follicular lymphoma (C82.0-, C82.1-, C82.3-).