If a medical condition makes it hard to work, you may be looking into disability benefits. In the United States, disability programs are managed by the Social Security Administration (SSA). The two main programs are SSDI (Social Security Disability Insurance) and SSI (Supplemental Security Income).

Although SSDI/SSI are federal programs, many steps still feel local—appointments, paperwork, and medical evidence collection happen where you live. This guide explains SSDI and SSI in Pennsylvania in an easy, step-by-step way: eligibility basics, how to apply, timelines, what documents help, why claims are denied, and what to do next if you receive a denial.