Hospital bill audits: a new growth industry.
D000066:Accounting / Q000639:trends*; D005375:Financial Audit / Q000639:trends*; D005376:Financial Management; D005377:Financial Management, Hospital; D007341:Insurance / Q000592:standards*; D007344:Insurance Claim Reporting / Q000592:standards*; D007350:Insurance, Hospitalization / Q000706:statistics & numerical data; D014481:United States