We applied three major comorbidity scoring systems-CIRS, HCT-CI, and Severe4-to a cohort of 379 patients with LBCL treated with CAR-T therapy. A high comorbidity burden was identified in 7% to 34% of patients, depending on the score used. However, a high comorbidity burden did not negatively impact the tolerability of CAR-T treatment, including the incidence of CRS, or hematologic toxicity. The use of tocilizumab and corticosteroids was comparable between patients with low and high comorbidity burden, as was the cumulative incidence of non-relapse mortality.