The phrase describes a condition that exists at the time a patient is admitted to a healthcare facility. It distinguishes between pre-existing ailments and those that develop during the hospital stay. For instance, if a patient is admitted with pneumonia, the pneumonia is considered to be existing upon the start of their inpatient care. Conversely, if a patient develops pneumonia several days after being admitted for a broken leg, the pneumonia is not existing at the admission.
Accurate determination of pre-existing conditions is vital for several reasons. It directly impacts hospital quality reporting, reimbursement rates, and public health data. Distinguishing between these conditions helps to track and manage hospital-acquired infections and complications, promoting patient safety and quality of care. Historically, clarity around these conditions has evolved alongside increasing emphasis on transparency and accountability in healthcare. This allows better identification of areas where improvements can be made within the healthcare setting.