The Social Security Administration (SSA) recently released several new Social Security Rulings (SSRs) that apply to both Social Security Disability Insurance (SSDI) and Supplemental Security Income (SSI) claims. The first two SSRs relate to the establishment of the onset of disability dates and replace SSR 83-20. SSR 18-01p and SSR 18-02p became effective as of October 2, 2018. SSR 18-01p addresses how the SSA determines the Established Onset Date (EOD) in claims involving "traumatic, non-traumatic, and exacerbating and remitting impairments," as well as other EOD related cases involving work activity and previously adjudicated periods. One important issue is that the SSR clarifies that an Administrative Law Judge ("ALJ") is not required to call upon a medical expert ("ME") to assist with inferring the claimant's EOD.