Medicare Financial Management

Clerical Errors in the Medicare Hospital Insurance and Supplementary Medical Insurance Trust Funds Gao ID: GAO-01-39R October 31, 2000

In a fiscal year 1999 accountability report to Congress, the Health Care Financing Administration (HCFA) made several clerical errors in the accounting of Medicare trust funds, which caused the Hospital Insurance (HI) Trust Fund to be overinvested by about $14 billion and the Supplementary Medical Insurance (SMI) Trust Fund to be underinvested by about $18 billion. Because of these errors, the HI Trust Fund earned excess interest and the SMI Trust Fund lost interest. GAO found that these errors went undetected for a year because of internal control weaknesses. Inadequate training and supervision and ineffective reconciliations were key factors that allowed the errors to go undetected. HCFA took corrective action, however, as soon as the errors were discovered.

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