Diffuse folicl center lymph, extrnod and solid organ sites

This code describes a type of non-Hodgkin lymphoma originating from the germinal center B-cells, specifically when it occurs outside of the lymphatic system (extranodal) or in solid organs. It signifies a widespread or disseminated presentation of diffuse follicle center lymphoma in non-lymphatic tissues.

Use this code when documentation clearly indicates a diagnosis of diffuse follicle center lymphoma that has metastasized to or originated in extranodal sites or solid organs. This diagnosis is typically confirmed by biopsy and pathology reports specifying the follicular center cell origin and diffuse pattern, along with imaging or clinical findings confirming extranodal or solid organ involvement.

• Ensure documentation specifies "diffuse" follicle center lymphoma, not "follicular" lymphoma, as these are distinct entities.
• Verify the involvement of extranodal sites or solid organs; if only nodal, a different code (e.g., C82.50) would be appropriate.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is clearly driving the current treatment.