when I had a colonoscopy they charged me 85. for self administered drugs. I questioned that but could not get an answer. what drugs do you self administer in a colonoscopy? I was told they would have to check the files and would get back to me, but I never got an answer. coding for these insurance companies is so easy to get wrong. another time they tried to bill me for the whole procedure and when I asked why they said my lifetime insurance allowed amount was already used up. when they saw it coded that way they changed the code and took care of the bill. always check how your charges are coded if something isn't covered.