Nurses use FIM scores to: 1. Assess Baseline Functionality: Establish a patient's initial level of independence. 2. Monitor Progress: Track changes in a patient's abilities over time. 3. Discharge Planning: Determine the most appropriate discharge setting and necessary services. 4. Communication: Provide a standardized language for discussing patient status with other healthcare providers. 5. Quality Improvement: Evaluate the effectiveness of rehabilitation programs and interventions.