Healthcare Resource Utilization and Costs of Medicare Fee for Service Beneficiaries Newly Diagnosed with Moderate to Severe Non-Advanced Systemic Mastocytosis

Systemic mastocytosis (SM) is a rare mast cell disease driven by the KIT D816V mutation in which mast cells accumulate in ≥1 tissues or organs resulting from clonal proliferation of abnormal mast cells in one or more extracutaneous organs. Most forms of SM are non-advanced (non-AdvSM). To date, the economic burden of non-AdvSM has not been well-studied among Medicare patients. This study compared direct healthcare resource utilization (HCRU) and healthcare costs in Medicare beneficiaries with non-AdvSM and a matched cohort without SM.