One kind is medical. This evidence is provided by physicians, psychiatrists, and psychologists. A second kind is functional. This kind of evidence is often provided by family members and others who know the applicant well. If the evidence is incomplete or superficial, a person who should be eligible might be ruled ineligible.
Appeals are often successful, but can take more than a year to complete.
Doing it right the first time might eliminate the need to appeal. A second way to show proof of disability is to document how the disability causes functional limitations. You, or other people who know the individual well, can play an important role in providing this information. 1. Activities of daily living. Establishing severity depends on how well the person who is disabled can start and participate actively in these activities independent of supervision or direction.