Macro Compare 2 Columns Different Worksheet And Copy Cell

I am trying to modify the macro listed below for the following example. It would work when I have only numerals in the cell but this new query, the cell has both letters and numbers.

I want to compare column "M" from worksheet one to column "B" in worksheet two. If the information matches, then copy the value adjacent from worksheet two column "A" to worksheet one column "L".

Here is the macro that worked for me using a search of only numerals.

figuring out why the data doesn't copy?

Macro:

Sub merge_accession_PS_rad_productivity()
Dim rng2 As Range, c2 As Range, cfind As Range
Dim x, y
With Worksheets("Imaging_Summary")
'N4=Accession on Imaging Summary worksheet

[Code]....