The National Institutes of Health (NIH) is offering a funding opportunity for prospective observational comparative effectiveness research (CER) in clinical neurosciences under the funding opportunity number PAR-25-048. This initiative aims to support investigator-initiated studies that evaluate the effectiveness of existing interventions, treatments, or diagnostic approaches for neurological disorders in real-world settings. The funding mechanism is a cooperative agreement divided into two phases: a 2-year UG3 planning phase and a 5-year UH3 implementation phase, contingent on meeting scientific milestones. Applications are encouraged from a diverse range of institutions, particularly those focusing on underrepresented populations and diseases. Key deadlines include an application due date of February 19, 2025, and a funding expiration on September 8, 2025. For further inquiries, interested parties can contact NIH Grants Information at grantsinfo@nih.gov.