A vitamin b12 injection is usually for pernicious anemia which is a form of anemia which is caused by a type of gastroectomy (spelling is probably wrong), but look for some type of gastro surgery because is causes a vitamin b12 deficiency. In simpler terms they had part of their stomach removed. I only know this because I have a patient that comes in every month for an injection. If it is only documented as anemia it will be rejected, so make sure you look for this particular type of surgery. You might have to go back at look at past surgery's to see if this is true or documented anywhere in the chart. I hope this is helpful.![]()
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