VBA insert row if I+2 contains certain text - excel

Question

So I have an excel sheet that can have anywhere from 5-1500 lines. Most lines have: 1) Title Row, 2) patient information, 3) blank row. Then it repeats. Some lines have 1) Title Row, 2) patient info, 3) additional patient info, 4)blank row. I need to insert a line between Rows 2&3 if there is info in row 3. Does this make sense?
Example:
--------A---------------------b-----------------c-------------------d--------
1-----acct #--------patient name------dr name------ date of service
2------123456-------Mickey Mouse-----Donald Duck--------1/4/19
3----------((((((((((((((all of this row is blank)))))))))))))))))))))----------
Or it could be this:
--------A---------------------b--------------------c-------------------d------
1-----acct #--------patient name--------dr name------ date of service
2------123456-------Mickey Mouse-----Donald Duck--------1/4/19
3------123456-------Mickey Mouse-----Donald Duck--------1/4/19
4----------((((((((((((((all of this row is blank)))))))))))))))))))))----------
Then this same format repeats throughout the sheet with different info of course. What I need is if row 3 has any info then insert a row between tows 2 & 3, but if row 3 is blank then skip to the next set.
This is the code I have so far but it is adding rows every other row no matter what.
Sub Macro()
Dim lastRow As Integer
lastRow = ActiveSheet.UsedRange.Rows(ActiveSheet.UsedRange.Rows.count).Row
Dim I As Long
For I = 6 To lastRow
If Cells(I + 2, 9).Text <> "" Then
Rows(I + 1).EntireRow.Insert Shift:=xlDown
lastRow=lastRow+1
End If
Next I
End Sub

Answer 1

As #BruceWayne stated in the comments, When inserting or deleting rows, columns or cells, it's helpful to iterate backwards. The Step parameter of a For-Next loop allows you to define how you would like to iterate. It defaults to Step 1. So instead of iterating from I = 6 to lastRow try
Dim lastRow As Long
Dim i As Long
lastRow = ActiveSheet.UsedRange.Rows(ActiveSheet.UsedRange.Rows.Count).Row
For i = lastRow To 6 Step -1
If Cells(i - 1, 9).Text <> "" And Cells(i, 9).Text <> "" Then
Rows(i).EntireRow.Insert Shift:=xlDown
End If
Next i
This would insert a row at your current iteration if both the current cell and the cell above it had data in them.
It's worth noting that if you were to iterate to row 1, the If statement above would raise an error, but you'd never need to.
EDIT:
If what you need is to only add a row between patient info and additional patient info, you'd need to find a consistently identifiable piece of data to add as a condition to the If statement.

Answer 2

Give this a try.
Customize the variables to fit your needs
Sub InsertRows()
' Define object variables
Dim rangeEval As Range
Dim currentCell As Range
' Define other variables
Dim sheetName As String
Dim rowCounter As Integer
' >>>> Customize this
sheetName = "Sheet1"
' Initialize the used range in column A ' Change the number in .Columns(1) to use another column
Set rangeEval = ThisWorkbook.Worksheets(sheetName).UsedRange.Columns(1)
' Loop through each cell in range
For Each currentCell In rangeEval.Cells
' We use this counter to check if we are every third row
rowCounter = rowCounter + 1
' If this is the third row and there is something in the cell, insert one row
If rowCounter Mod 3 = 0 And currentCell.Value <> vbNullString Then
currentCell.EntireRow.Insert
' Reset the counter if there is nothing in the cell
ElseIf currentCell.Value = vbNullString Then
rowCounter = 0
End If
Next currentCell
End Sub