Follicular lymphoma grade II, extrnod and solid organ sites

This code signifies a specific type of non-Hodgkin lymphoma, follicular lymphoma, which is characterized by a grade II cellular differentiation. The disease is located outside of the lymph nodes, affecting solid organs or other extranodal tissues.

Use this code when documentation confirms a diagnosis of follicular lymphoma, specifically graded as II, and the tumor is identified in sites such as the gastrointestinal tract, bone marrow, liver, or other organs outside the lymphatic system. Pathological reports and imaging studies confirming extranodal involvement are essential for accurate coding.

• Ensure the pathology report explicitly states "follicular lymphoma grade II" and clearly identifies extranodal involvement.
• Do not use this code if the lymphoma is described as nodal or unspecified site; specific codes exist for those presentations.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is driving the primary treatment.