What could cause fatigue. The cancer itself. Fatigue can be one of the first symptoms of cancer. It could be because there is cancer in the bone marrow and that slows down the production of red blood cells, causing anaemia. A cancer that affects your hormone levels could cause fatigue.
Medicare Suffixes. Hereâs what the letters behind the Medicare number mean: *A = retired worker. B = wife of retired worker. B1 = husband of retired worker. B6 = divorced wife. B9 = divorced second wife. C = child of retired or deceased worker; numbers after. C denote order of children claiming benefit.
Rickâs Tips: 1  Letter codes following the Social Security number on Medicare cards do not indicate the type of insurance. 2  Letter code âAâ is the most prevalent code and denotes a retiree has 40 quarters of work history. 3  Medicare will eventually be changing their claim numbers to use something other than the claimantâs Social Security number.