Max length for an if statement

I am working on a formula in crystal using Visual Basic. I need to pull out lists of workers titles from a set list I have written down. I am using a fairly long if statement here and would like to know if there is a max number of conditions I can use in a given if statement.

Here is an example of what I am using.
*******************************

If (InStr({Concurrence.ConcurrenceName}, " MD", 1) > 0 _
or InStr({Concurrence.ConcurrenceName}, " COS ", 1) > 0 _
or InStr({Concurrence.ConcurrenceName}, ", M.D.", 1) > 0 _
or InStr({Concurrence.ConcurrenceName}, "M.D.", 1) > 0 _
or InStr({Concurrence.ConcurrenceName}, " M D", 1) > 0 _
or InStr({Concurrence.ConcurrenceName}, "D.O.", 1) > 0 _
or InStr({Concurrence.ConcurrenceName}, " DO", 1) > 0 _
or Instr({Concurrence.ConcurrenceName}, " DR.", 1) > 0 _
or Instr({Concurrence.ConcurrenceName}, " DR ", 1) > 0) _
or InStr({Concurrence.ConcurrenceName}, "MD", 1) > 0 _
or InStr({Concurrence.ConcurrenceName}, " DO ", 1) > 0 _
or InStr({Concurrence.ConcurrenceName}, "DR", 1) = 1) then
formula = "Physician"

ElseIf (InStr({Concurrence.ConcurrenceTitle}, "PHYSICIAN", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "ATTENDING", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "ACOS", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "COS ", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "CHIEF MEDICAL", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "CHIEF OF STAFF", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, " M.D.", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, " MD,", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "MD", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "M.D", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "D.O.", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "SURGEON", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "INTERNIST", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "DOCTOR", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, " CHIEFOFSTAFF", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "ANESTHESIOLOGIST", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "CARDIOLOGIST", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "CHIEFSOFSTAFF", 1) > 0 _
or InStr({Concurrence.ConcurrenceTitle}, "AOD", 1) > 0) then
formula = "Physician"

End If

For some reason crystal does not pull out the "PHYSICIAN" title in the second if else statement. However, if I put it in its own if statement it will evaluate properly. (I broke the if statement up for maintenance ease)

Like this:

If InStr({Concurrence.ConcurrenceTitle}, "PHYSICIAN", 1) > 0 Then
formula = "Physician"
End If

So, I am wondering if I simply have too long of an if statement and need to break this up in order to get all of the titles I am looking for.

Any suggestions on how long each if statement can be, or possibly a more efficient way to write this?

Thanks in advance.

RyanIf there are many IFs then why cant you use Case statement?sql