The National Institutes of Health (NIH) is inviting applications for the National Cancer Institute's Investigator-Initiated Early Phase Clinical Trials for Cancer Treatment and Diagnosis (R01 Clinical Trial Required) funding opportunity. This initiative aims to support research projects that implement early phase clinical trials (Phase 0, I, and II) focused on cancer-targeted diagnostic and therapeutic interventions, aligning with the mission of the NCI. The funding opportunity is crucial for advancing innovative cancer treatments and improving patient outcomes through rigorous clinical research. Interested applicants can apply for up to $499,999 in direct costs per year for a project period of up to five years, with the application process opening on January 5, 2024, and a submission deadline of January 7, 2027. For further inquiries, applicants may contact NIH Grants Information at grantsinfo@nih.gov.