display your fields in the group header and suppress the details.
the group header will display the content from the first row in the group so you need the details to be sorting in the order that gets the first row the data you want to display.
Also note that this is only about how the data is being displayed. All of the 'duplicate' data is still part of the report so any calculations or summation you do include all of the rows.

Edited by DBlank - 28 Jan 2016 at 3:15am

I misunderstood.
Create group level 2 using a string formula.
I can't tell if some of your fields are strings or numeric so you may need to adjust to deal with that.
//group level formula
totext(table.mrn,0,"")+table.patientname+totext(table.admitdate,"MM/dd/yyyy")
insert a count of the MRN at this group level.
Now whenever that count is>1 you can display else hide

I understood that.
reread my response. It is accounting for the admit date duplication.
Although I think you can likely remove your top level grouping completely and replace it with the formula grouping i suggested. Sorting might be an issue though.

Got it thanks so much.