Hi SueB
Most claimants nowadays receive telephone assessments, some are asked for a video assessment, if you do not have a smart phone then this will not happen. Some claimants have a face to face assessment.
The phone call could be to clarify some aspects on your form that you sent in. they also need to verify what you have written. They may be aware that you were in hospital and just checking the admission and discharge dates.
There are lots of scare stories going around which makes claimants nervous contacting DWP, unfortunately you seldom hear the good news stories.
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems