BackgroundDuring calendar years 2021 through 2023, our health system admitted 200,837 persons 18 years and older with diabetes, of which 61% (n = 123,393) were 65 years and older with orders for insulin administration. The incidence of diabetes among hospitalized persons 65 and older continues to increase in the United States, with 24 million adults 65 and older with diabetes reported in 2020. Insulin, a high‐risk medication, has the potential for adverse drug events, which can cause significant harm to patients, potentially resulting in death. With the 2023 initiation of voluntary electronic clinical quality measures reporting for severe glycemic harm events from the Centers for Medicare Services, the study team saw an opportunity to evaluate and standardize insulin‐related practices across the system.MethodsWe implemented an Insulin Safety Campaign (ISC), to review, evaluate, and standardize insulin‐related processes across our health system. The primary goal was to reduce severe glycemic harm events system‐wide. Insulin‐related practices were reviewed for best practice alignment and standardized. Outcomes were measured according to the Centers for Medicare and Medicaid Services' electronic clinical quality measures reporting guidelines.ResultsComparing pre‐and post‐implementation results, all five medical centers achieved statistically significant reductions in sever hyper‐ and hypoglycemic harm events.ConclusionsThrough a collaborative effort, we were able to identify, address, and reduce insulin‐related process variabilities through standardization, reducing the percentage of severe glycemic harm events and improving blood glucose management in our hospitalized persons 65 and older.