As a reminder, per the January 2013 update of SEER*Rx, the drug, Rituximab, (Rituxan) changed categories. For cases diagnosed prior to January 1, 2013, code Rituximab (Rituxan) as chemotherapy. Effective with diagnosis date January 1, 2013 forward, code Rituximab (Rituxan) as BRM/Immunotherapy. This was the result of a comprehensive review and in collaboration with the FDA.