The correlation between inpatient diagnostic and billing codes: the principal diagnosis.
D000043:Abstracting and Indexing / Q000379:methods*; D003365:Costs and Cost Analysis; D003953:Diagnosis-Related Groups; D004194:Disease / Q000145:classification; D006801:Humans; D012051:Reimbursement Mechanisms; D013223:Statistics as Topic; D014481:United States