Informatics is the collection, manipulation and use of information.

Information Technology is the hardware and software that Informatics uses.

There is debate about whether to call paper records an "information system" or "information technology" and whether or not it can be considered part of "informatics".

I believe that paper records should be considered part of the information system and should be considered as part of "health informatics".  I would probably draw the line at considering it "information technology" (unless you have a very low bar for defining technology).