MedisGroups: quality assurance in Pennsylvania.
D003363:Cost Control; D003953:Diagnosis-Related Groups; D006801:Humans; D008331:Management Information Systems; D010361:Patients / Q000145:classification; D010414:Pennsylvania; D011785:Quality Assurance, Health Care / Q000379:methods*; D012720:Severity of Illness Index; D014600:Utilization Review