Error Rates and Projected Improper Payments by Contractor Type

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Type of Contractor Total Dollars Paid Overpayments Underpayments (Overpayments + Underpayments)
Payment Rate Payment Rate Improper Payments Error Rates
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Carrier $72.9B $3.5B 4.8% $0.2B 0.2% $3.7B 5.0%
DMERC $9.2B $0.7B 7.4% $0B 0.1% $0.7B 7.5%
FI $63B $1.3B 2.0% $0.2B 0.3% $1.5B 2.3%
QIOs $101.7B $4.3B 4.3% $0.6B 0.6% $4.9B 4.9%
All Medicare FFS $246.8B $9.8B 4.0% $1B 0.4% $10.8B 4.4%