<Li> 1951 Railroad workers with less than 10 years of service, for all benefits . (After October 1951, coverage is retroactive to 1937 .) </Li> <Li> 1954 Farm self - employed . Professional self - employed except lawyers, dentists, doctors, and other medical groups . Additional regularly employed farm and domestic workers . Homeworkers . State and local government employees (except firemen and policemen) under retirement system if agreed to by referendum . Ministers could elect coverage as self - employed . </Li> <Li> 1956 Members of the uniformed services . Remainder of professional self - employed except doctors . By referendum, firemen and policemen in designated States . </Li> <Li> 1965 Interns . Self - employed doctors . Tips . </Li>

Who was involved in the social security act