Chimeric antigen receptor (CAR) T-cell therapy has ushered in a transformative era in the management of relapsed/refractory hematologic malignancies. The extensive phase II trials targeting relapsed/refractory non-Hodgkin lymphoma, including diverse subtypes such as diffuse large B-cell lymphoma, follicular lymphoma, and mantle cell lymphoma, along with multiple myeloma and B-cell acute lymphoblastic leukemia, have culminated in the endorsement of various CAR T-cell products for these specific indications by the US Food and Drug Administration. Although CAR T-cell therapy has achieved remarkable success, it is important to recognize that this innovative approach often gives rise to notable toxicities and is frequently associated with a distinctive pattern of adverse effects. Advanced practice providers, including advanced practice nurses and physician associates, involved in the care of these patients should be able to recognize these toxicities and be versed in treatment strategies to mitigate their impact.