1. Variation in coding influence across the USA: risk and reward in reimbursement optimization;Lorence;Journal of Management in Medicine,2002
2. DRG creep: a new hospital-acquired disease;Simborg;The New England Journal of Medicine,1981
3. Accuracy of diagnostic coding for Medicare patients under the prospective payment system;Hsia;The New England Journal of Medicine,1988
4. US Department of Health and Human Services, Office of Inspector General. Improper Fiscal Year 2002 Medicare Fee-for-Service Payments, A-17-02-02202. Washington, DC: Department of Health and Human Services; 2003.
5. Improper Medicare fee-for service payments long reports;Centers for Medicare and Medicaid,2005