How do I find the ImPACT test version? ImPACT test version is provided on page 2 of the clinical report. Updated on 03/01/2021 Was this article helpful? Yes No Related Articles What is the Two-Factor Score? What are the differences between ImPACT and ImPACT Version 4? Is ImPACT Version 4 available in languages other than English? How do I know whether I should use the Two-Factor Score or the 4 composite scores when interpretating the ImPACT Clinical Report data? If I administer a post-injury test with ImPACT Version 4, can I compare it to a test taker’s baseline from an older version of ImPACT? Can I use the same billing codes with ImPACT Version 4 as I do with the current version of ImPACT?