I have a Medicare remittance notice that shows an offset with a 'WU' remark code. What does the 'WU' indicate?

The "WU" indicates that an unspecified recovery has been applied toward your payment. This was not initiated through a Medicare Part B overpayment. Call the IRS telephone number on the Medicare remittance notice, 800–829–7650 or 800–829–3903, for more information. Have your tax identification number available when calling.

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