This report presents a comprehensive care management plan for a 60-year-old patient, Sara, diagnosed with chronic osteomyelitis, alongside pre-existing conditions of diabetes and hypertension. The report begins with a case study, followed by an assessment of Sara's complex health conditions, emphasizing the risks associated with each. The care plan focuses on managing osteomyelitis through pain management, infection control, and mobility improvement, considering the patient's reluctance for hospitalization. It also addresses diabetes management through dietary modifications and blood glucose monitoring, and hypertension management via blood pressure tracking and dietary adjustments. Furthermore, the plan incorporates strategies to address Sara's anxiety and social isolation by providing psychological counseling and encouraging social interaction. The report details the care strategies, including medication, dietary plans, and regular assessments, and emphasizes the importance of family involvement and effective communication. The clinical decision-making process within a multi-agency context is also discussed, highlighting the need for continuous evaluation and adaptation of the care plan to ensure optimal patient outcomes. The report considers the patient's vulnerability due to her age and pre-existing conditions, and the importance of addressing the comorbidities associated with osteomyelitis, diabetes, and hypertension.