Convert rs ID of one hg build to rs IDs of another build I have a list of dbSNP rsIDs for GRCh37 and I want to convert them to the equivalent IDs in GRCh38. This is using the most recent dbSNP build (150 as of the time of this post). Is there any ID mapping available? If not, are there any tools I can use?
You can assume that the overwhelming majority of rsIDs are the same between GRCh37 and GRCh38 (they're semi-stable IDs). There are, however, a number of rsIDs that are present only in GRCh37, which you can find here. Note that the format of this file is a bit strange, it's chromosome|position|ID|weight, where position is sometimes empty, weight is typically 1, and ID is the rsID without the rs prefix.

Also, some rsIDs have a different strand. This is less likely to be an issue for you, but it's there in case you need it.