20 Background: Improvements in the understanding of prostate tumor development have spurred advances in biomarker testing and new therapies for prostate cancer, providing clinicians with expanded testing and treatment options. However, these changes have led to competence gaps regarding the use of biomarker testing, integration of PARP inhibitors, application of new data for nmCRPC and mCRPC, and adverse event management. To address these needs, a serial educational initiative was designed for the urology-oncology team. Methods: A 4-part CE activity was launched live-online in December, 2020, and remains on-demand through December, 2021 at UroCareLive.com and OMedLive.com. The activity was launched in partnership with Large Urology Group Practice Association (LUGPA) and included case presentations, live polling, and Q&A. Knowledge and competence questions were administered pre-activity, immediate post-activity, and 2-months post-activity. Patient and clinical practice-impact questions were also asked at the 2-month follow-up. Data from these questions were analyzed to determine engagement and clinical impact. Results: To date, 761 clinicians have participated in the activity. All 12 CE test questions reflected improvements in knowledge and competence, 11 of which were statistically significant. Questions focused on: genomic testing, biomarker analysis, recent clinical trial study results, newly approved therapies, and adverse event management. At 2-mos. follow-up, 70% reported improved behavioral impact on clinical practice and 63% reported impact on patient experience and outcomes. Clinicians provided write-in examples of these changes, illustrating improvements in patient-reported satisfaction, genetic testing, and use of newer therapies, including PARP inhibitors. Practice pattern questions pertaining to biomarker testing and the use of emerging therapies showed the majority of post-program respondents (42%) preferred to utilize blood/serum-based biomarker tests for their patient vs urine- or tissue-based tests. The greatest reported challenges to biomarker testing were affordability (30%) and lack of guideline clarity (23%). The top 2 barriers to adoption of new agents were reported as lack of awareness and lack of experience (32% and 20%, respectively). Conclusions: The activity successfully improved uro-oncology team knowledge of genetic testing and newer therapies to manage castration-resistant prostate cancer. Learners demonstrated significant improvements in competence concerning biomarker testing, treatment personalization, and adverse event management. Open-ended responses to behavioral impact questions illustrated improvements in biomarker usage, application of newer therapies, and confidence in patient counseling regarding treatment options.