I'd say 217 is not normal. Many other countries use the cut off of 500 or so. Japan especially is very aggressive with this because they had a huge national disaster of low B12 caused by the drug Vioform (clioquinol) which was removed from oral sale in US in the 70's.
The article from 2003 I linked to by American Association of Family Physicians uses 400.
If you are having problems, enough to look for answers on the internet, and have arrived HERE, I'd start with B12 supplements ASAP.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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