Hospital readmission refers to a situation in which a patient is discharged from a hospital and then returns to the hospital within a specified period, usually within 30 days. This phenomenon is a common occurrence in healthcare and is often used as a measure of the quality of care provided to patients. Hospitals, healthcare providers, and policymakers are interested in reducing readmission rates as readmissions can be costly, disruptive to patient care, and indicative of potential gaps in care. Research in this area focuses on identifying factors associated with readmissions, developing interventions to reduce readmission rates, and implementing strategies to improve transitional care and follow-up after discharge.