Glossary

An inpatient or hospital classification system used to pay a hospital or other provider for their services and to categorize illness by diagnosis and treatment. A classification scheme used by Medicare that clusters patients into 468 categories on the basis of patients’ illnesses, diseases and medical problems. Groupings of diagnostic categories drawn from the International Classification of Diseases and modified by the presence of a surgical procedure, patient age, presence or absence of significant comorbidities or complications, and other relevant criteria. System involving classification of medical cases and payment to hospitals on the basis of diagnosis. Used under Medicare’s prospective payment system to reimburse inpatient hospitals, regardless of the cost to the hospital to provide services.