Social Security Justice Act of 1990

Social Security Justice Act of 1990 - Amends titles II (Old Age, Survivors and Disability Insurance) and XVI (Supplemental Security Income) of the Social Security Act to require the Secretary of Health and Human Services to apply an interpretation of provisions of, or regulations under, such titles reached by a U.S. court of appeals in a case to which the Department of Health and Human Services or an employee was a party to all individuals and circumstances within the court's jurisdiction, except during the pendency of an appeal of the court's decision to the Supreme Court. Requires the Secretary to: (1) appeal a decision which requires the Secretary's acquiescence in more than one circuit on the same question of law; and (2) apply such decision to all individuals and circumstances in all circuits if the question of law is not reviewed by the Supreme Court.

Gives the U.S. courts of appeals original jurisdiction over actions in the nature of mandamus brought by individuals whose rights may be prejudiced if the Federal Government is not compelled to carry out its duties under this Act.