Four new AMA-approved CPT® codes for CAR-T cell collection, cell processing (outbound and inbound), and administration (3X018-3X021) go into effect on 1/1 2025. Nimitt created this article to help providers advocate for CMS to provide hospitals with OPPS payment for outpatient CAR-T cell collection and cell processing services to ensure appropriate payment is provided to hospitals for the clinical services provided to patients.