What I found works if I'm interested in some particular gene is searching it in the "Browse Raw Data" option in the 23andMe web, then I know every "I" listed there is from that gene. The position in the genome is given and also the assembly (GRCh37 for my v4 chip). With this information I can make a search in the National Library of Medicine or any searching web that allows to search by position.
For instance:
If I'm looking in the sucrase-isomaltase gene "SI", in the chromosome 3, the first "I" found is "i6054899" in the position "164712061".
Then i go here I select my assembly (GRCh37) and search for "Chr3: 164712061" (chromosome: position).
Now I can see the SNP in that position and check if I have some variant and the pathogenity of the SNP (sometimes there's no SNP in that position).
Don't know if I'm doing something wrong, with this method I don't find the previous Lynch SNP. Maybe there's an easier way around this, but this is what I'm doing. Probably GenVue is doing something like that to parse the "I" numbers.