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Home » Glossary » Alleged Onset Date Aod

Definition of Alleged Onset Date Aod

Alleged onset date or AOD is the date the worker claims they are no longer able to perform substantial gainful activity (SGA) due to a severe health condition. The AOD date should not be confused with the established onset date (EOD). Although the dates could be the same, it is possible the SSA will decide the claimant's established onset date is after the AOD. This can occur if the Social Security Administration cannot find evidence the claimant became disabled immediately after quitting work. To determine a claimant's EOD date, the SSA will review their medical information and work history.

If, for instance, the claimant claims on their disability application that their AOD date is one month, but they performed substantial work after their AOD date, the SSA will determine their actual established onset date is after the date the claimant listed as their AOD, regardless of the severity of their stated condition.

Many claimants do not understand the importance of the AOD or what will happen if the SSA modifies their EOD date. Basically, the EOD date will determine how much back pay a claimant may be able to receive. For instance, if the SSA determines the EOD is later than you stated, you could lose some back pay benefits. Keep in mind, however, if the SSA modifies your EOD date, but it is still more than 17 months before your application date, it will not matter because you will not get back pay for more than 12 months before your application date, plus the five month waiting period.

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