Mediastnl large B-cell lymph, extrnod and solid organ sites

This diagnosis code identifies a rare, aggressive type of non-Hodgkin lymphoma originating from B-lymphocytes, specifically found in the mediastinum (the area between the lungs) and involving sites outside of the lymphatic system or solid organs. It is characterized by large B-cells and often presents as a bulky mass in the anterior mediastinum.

Apply this code when documentation explicitly states a diagnosis of mediastinal (thymic) large B-cell lymphoma that has spread beyond the mediastinum to extranodal sites or solid organs. Supporting documentation would include pathology reports confirming the specific lymphoma subtype and imaging or biopsy reports detailing involvement of extranodal or solid organ sites.

• Ensure the pathology report specifies "mediastinal (thymic) large B-cell lymphoma" and not just "diffuse large B-cell lymphoma."
• Verify documentation clearly indicates involvement of extranodal or solid organ sites; otherwise, a more generalized code for mediastinal large B-cell lymphoma may be appropriate.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, followed by codes for any associated signs, symptoms, or complications.