Expert medical witnesses may be used in various capacities during a disability hearing. For instance, a medical expert may be able to testify that a claimant’s medical condition matches one of the conditions on the SSA’s Listing of Impairments that usually prevent workers from continuing in any gainful employment. If the judge is satisfied that a claimant’s condition should be considered a listed condition or equivalent, the claimant may be awarded benefits without needing to prove they have no other vocational options.