Immune checkpoint inhibitors (ICPis) are a novel class of immunotherapeutic agents that have revolutionized the treatment of cancer; however, these drugs can also cause a unique spectrum of autoimmune toxicity. Autoimmune hemolytic anemia (AIHA) is a rare, but often severe, complication of ICPis. We identified 14 patients from nine institutions across the United States who developed ICPi-AIHA. The median interval from ICPi initiation to development of AIHA was 55 days (interquartile range [IQR], 22-110 days). Results from the direct antiglobulin test (DAT) were available for 13 of 14 patients: 8 patients (62%) had a positive DAT and 5 (38%) had a negative DAT. The median pretreatment and nadir hemoglobin concentrations were 11.8 g/dL (IQR, 10.2-12.9 g/dL) and 6.3 g/dL (IQR, 6.1-8.0 g/dL), respectively. Four patients (29%) had a preexisting lymphoproliferative disorder, and two (14%) had a positive DAT prior to initiation of ICPi therapy. All patients were treated with glucocorticoids, with three requiring additional immunosuppressive therapy. Complete and partial recoveries of hemoglobin were achieved in 12 (86%) and 2 (14%) patients, respectively. Seven patients (50%) were rechallenged with ICPis, and one (14%) developed recurrent AIHA. Clinical and laboratory features of ICPi-AIHA were similar in DAT positive and negative patients. ICPi-AIHA shares many clinical features with primary AIHA; however, a unique aspect of ICPi-AIHA is a high incidence of DAT negativity. Glucocorticoids are an effective first-line treatment in the majority of patients with ICPi-AIHA, and most patients who are rechallenged with an ICPi do not appear to develop recurrence of AIHA. a Long-standing history of leukopenia of unclear etiology, bone marrow biopsy negative for malignancy, and leukopenia believed to be autoimmune in nature. b Received indoximod in combination with ICPi therapy as part of a clinical trial. c R-CHOP, fludarabine (received >3 years prior to development of AIHA), XRT, auto-SCT for treatment of MZL, and cisplatin and etoposide for treatment of NSCLC. d Received nivolumab on a clinical trial after conventional chemotherapy. e 5-FU, oxaliplatin, irinotecan, bevacizumab, panitumumab, regorafenib, and trifluridine/tipiracil. f Received GVAX and cyclophosphamide in combination with ICPi therapy as part of a clinical trial. g Dabrafenib, trametinib for treatment of melanoma, fludarabine (received >3 years prior to development of AIHA), cyclophosphamide, bendamustine, rituximab, obinutuzumab, and ibrutinib for treatment of CLL.