The Social Security Handbook, in Chapter 6, paragraph 607, states that "medical evidence alone may establish that a person ... is disabled where it establishes the presence of an impairment included in the Listing of Impairments ... provided that other evidence does not show the person to be engaged in substantial gainful activity. ... The Listing of Impairments is set out in SSA regulations and used by SSA to determine a disabling level of impairment. This Listing contains examples of common impairments for each of the major body systems which are deemed to be of such severity as to prevent a person from doing any gainful activity ... " Does anyone know whether Parkinson's disease is on the list? Is the list accessible on-line? Where? Phil