That's all easy enough with some tweaks to the formula:
| T | U | V | W | X | Y | Z | AA | AB | AC | AD |
---|
Diagnosis | Date | | | | | | | | | | |
Autism | Most Common Diagnoses | | | | | | | | | | |
Down's Syn | Asthma | Autism | | | | | | | | | |
Asthma | Down's Syn | ID | | | | | | | | | |
ID | Autism | Down's Syn | | | | | | | | | |
Autism | | | | | | | | | | | |
Autism | | | | | | | | | | | |
Asthma | | | | | | | | | | | |
Down's Syn | | | | | | | | | | | |
Autism | | | | | | | | | | | |
Autism | | | | | | | | | | | |
Down's Syn | | | | | | | | | | | |
Asthma | | | | | | | | | | | |
ID | | | | | | | | | | | |
Autism | | | | | | | | | | | |
Autism | | | | | | | | | | | |
Asthma | | | | | | | | | | | |
Down's Syn | | | | | | | | | | | |
Autism | | | | | | | | | | | |
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[TD="align: right"]1/31/2018[/TD]
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Sheet3
[TABLE="width: 85%"]
<tbody>[TR]
[TD]
Worksheet Formulas[TABLE="width: 100%"]
<thead>[TR="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]
[TH="width: 10px"]Cell[/TH]
[TH="align: left"]Formula[/TH]
[/TR]
</thead><tbody>[TR]
[TH="width: 10px, bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]AC2[/TH]
[TD="align: left"]=EOMONTH(
AB2,0)+1[/TD]
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</tbody>[/TABLE]
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</tbody>[/TABLE]
[TABLE="width: 85%"]
<tbody>[TR]
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Array Formulas[TABLE="width: 100%"]
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[TH="width: 10px"]Cell[/TH]
[TH="align: left"]Formula[/TH]
[/TR]
</thead><tbody>[TR]
[TH="width: 10px, bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]AB3[/TH]
[TD="align: left"]{=IFERROR(
INDEX(Diag,MODE(IF(COUNTIF(AB$2:AB2,Diag)=0,IF(LEN(SUBSTITUTE(Diag," ",""))>0,IF(RefDate>=AB$2,IF(RefDate<=EOMONTH(AB$2,0),MATCH(Diag,Diag,0))))))),"")}[/TD]
[/TR]
</tbody>[/TABLE]
Entered with Ctrl+Shift+Enter. If entered correctly, Excel will surround with curly braces {}.
Note: Do not try and enter the {} manually yourself[/TD]
[/TR]
</tbody>[/TABLE]
[TABLE="width: 85%"]
<tbody>[TR]
[TD]
Workbook Defined Names[TABLE="width: 100%"]
<thead>[TR="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]
[TH="width: 10px"]Name[/TH]
[TH="align: left"]Refers To[/TH]
[/TR]
</thead><tbody>[TR]
[TH="width: 10px, bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]Diag[/TH]
[TD="align: left"]=Sheet3!$T$2:$T$25[/TD]
[/TR]
[TR]
[TH="width: 10px, bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]RefDate[/TH]
[TD="align: left"]=Sheet3!$Y$2:$Y$25[/TD]
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[/TD]
[/TR]
</tbody>[/TABLE]
Removing the count is easy enough, just don't use that formula. Then put your starting date in AB2 (or whatever cell you want), and put the following months in the next columns. You can use the formula in AC2 if you want and drag right. You can even put in the 1st 2 dates, then use AutoFill to fill in the rest.
Now put in the AB3 formula, change the ranges to match your sheet, and confirm with Control+Shift+Enter. Now drag the formula down and right as needed. The AB2 here refers to the row right above the formula, and now expects the date to be there. Pay special attention to the $ signs, because they are designed to adapt as you copy the formula. The IF(LEN(SUBSTITUTE part I added to ignore any cells that are empty, or filled only with spaces.
Let me know how this works!