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Introduction: We hypothesized that a nocturnist advanced practice provider (APP) model compared with overnight neurocritical care coverage with general critical care physicians and neurology residents would provide similar patient outcomes, as measured by patient mortality. Methods: This study is a retrospective review of healthcare outcomes of aneurysmal subarachnoid hemorrhage (aSAH) patients from 2013 and 2016, after implementation of specialty-trained neurocritical care nocturnist APPs. In 2013, overnight hours were covered by the general intensive care unit team and a junior neurology resident. In 2016, these patients were cared for by APPs overnight. The primary outcome measured was comparison of mortality before and after this change of overnight coverage because the daytime coverage remained similar between years. Results: In 2013, 58 patients were admitted to the neurocritical care unit with aSAH. In 2016, 19 aSAH patients were admitted to the neurocritical care unit. The mean modified Fisher grade was 3.36 in 2013, with 14 of 58 deaths (mortality rate, 24%). In 2016, the mean modified Fisher grade was 3.4. Three patients died (mortality rate, 15.7%). Conclusion: The active nocturnist APP model was associated with an approximately 10% reduction in SAH mortality (P = .54). This supports the hypothesis that APPs can provide noninferior care as the previous model. Further studies are needed to demonstrate the effects of both nocturnist and APP-driven models.