Unspecified B-cell lymphoma, spleen

This code signifies a malignant proliferation of B-lymphocytes, where the specific subtype of B-cell lymphoma has not been identified, and the primary or sole site of involvement is the spleen. It indicates a diagnosis of lymphoma affecting the spleen without further pathological classification.

Use this code when the medical record explicitly states "unspecified B-cell lymphoma of the spleen" or "splenic B-cell lymphoma, type unknown." It is appropriate when pathology reports confirm B-cell lymphoma in the spleen but lack the detail to classify it further (e.g., diffuse large B-cell lymphoma, follicular lymphoma).

• Do not use if a more specific B-cell lymphoma type (e.g., C83.37 for diffuse large B-cell lymphoma of spleen) is documented.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter or admission.
• Ensure documentation clearly indicates splenic involvement and the unspecified nature of the B-cell lymphoma.