2007 ICD-9-CM Procedure 95.23 Visual evoked potential [vep] An objective test of eye function measuring the electric response evoked in the cerebral cortex by visual stimulation. 95.23 is a specific code that can be used to specify a procedure 95.23 contains 2 index entries View the full Volume 3 95.* hierarchy Index entries containing 95.23: VEP (visual evoked potential) 95.23 Visual evoked potential (VEP) 95.23