426 U.S. 67 96 S.Ct. 1883 48 L.Ed.2d 478 F. David MATHEWS, Secretary of the Department of Health, Education, and Welfare, Appellant,v.Santiago DIAZ et al. No. 73-1046. Argued Jan. 13, 1975. Reargued Jan. 12, 1976. Decided June 1, 1976. Syllabus Title 42 U.S.C. ? 1395O (2) qualifies for enrollment in the Medicare supplemental medical insurance […]