Follicular lymphoma grade I, spleen

This code signifies a low-grade, indolent non-Hodgkin lymphoma originating from follicular center B-lymphocytes, specifically located in the spleen. It indicates a well-differentiated form of follicular lymphoma.

Apply this code when documentation clearly states a diagnosis of follicular lymphoma, histologically graded as Grade I, with confirmed involvement of the spleen. This diagnosis is typically established through biopsy and imaging studies.

• Ensure the pathology report explicitly states "Grade I" for follicular lymphoma.
• Confirm splenic involvement through imaging reports or surgical findings.
• Do not use this code if the grade is unspecified or if other sites are involved without specific splenic documentation.