Admitting that he used does not necessarily mean that he is being honest but 200 days is a long stretch.
Many addicts get high and then admit it or admit to part of it. (they got drunk but not high or visa versa) just to make it appear they are trying.
I used, I am sorry.
I used, I will try harder
I used, Never again!
I used, I don’t want to do this anymore
I used, That is it, I am really going to stop this time
I used…..
I think you get the idea.
It sounds like you are on the right track though and that is important. Keep up the good work taking care of yourself.