Budget impact of introducing glofitamab for treatment of relapsed or refractory diffuse large B-cell lymphoma after two or more lines of systemic therapy in the United States

Glofitamab is a T-cell engaging bispecific monoclonal antibody that was granted accelerated approval from the United States Food and Drug Administration for adult patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL), not otherwise specified or large B-cell lymphoma arising from follicular lymphoma, after ≥2 lines of systemic therapy (3L+). A budget impact model was developed fora hypothetical blended commercial/Medicare health plan with 1,000,000 members. Comparators were axicabtagene ciloleucel (Axi-cel), lisocabtagene maraleucel (Liso-cel), tisagenlecleucel (Tisa-cel), loncastuximab tesirine, polatuzumab vedotin + bendamustine + rituximab, rituximab + gemcitabine + oxaliplatin, tafasitamab + lenalidomide, and epcoritamab (Epcor). Total costs included those for drugs, wastage, administration, grade ≥3 adverse reactions and all-grade cytokine release syndrome) and routine care. Market shares were based on internal projections and expert opinions. Total and per-member per-month (PMPM) net budget impacts over 3 years were calculated. Approximately nine patients were projected to be eligible for 3L + DLBCL treatment in a health plan of 1,000,000 members. The introduction of glofitamab as a treatment option resulted in estimated total and PMPM cost savings of $728,697 and –$0.0202, respectively, over 3 years. Costs were reduced across all cost categories but particularly in drug costs. Among the newer therapies, total 3-year cost per treated patient was lowest for glofitamab: $226,658 versus Tisa-cel = $564,113; Axi-cel = $540,002; Liso-cel = $516,272; and Epcor = $335,293. Across all sensitivity analyses, the inclusion of glofitamab had minimal PMPM budget impact, ranging from –$0.0256 to –$0.0108. With the lowest 3-year total cost per treated patient among the newer therapies, glofitamab being an available option in the 3L + DLBCL market is estimated to save a hypothetical 1,000,000-member health plan $728,697 in cumulative total costs and $0.0202 in PMPM costs over 3 years. Glofitamab is a new treatment for a common type of blood cancer that does not respond to at least two other treatments. This analysis estimated the change in a health plan’s spending over a 3-year period if it covered and used glofitamab rather than epcoritamab or other options and found that the plan’s 3-year spending decreased by $0.02 per plan member per month in overall costs.