Abnormal results of function studies of cnsl

This code signifies abnormal findings from various non-specified functional tests assessing the central nervous system (CNS). It indicates that diagnostic studies, beyond those specifically categorized elsewhere, have revealed irregularities in CNS function, suggesting potential neurological impairment or dysfunction.

Use this code when documentation indicates abnormal results from CNS function studies such as evoked potentials (e.g., visual, auditory, somatosensory) or other specialized neurophysiological tests, where a more specific R94.- code is not applicable. This code is appropriate when the physician explicitly states "abnormal results" or similar findings from these types of studies, without a definitive diagnosis yet established.

• Do not use this code if a definitive diagnosis explaining the abnormal findings has been established; instead, code the specific diagnosis.
• Distinguish from R94.01 (abnormal electroencephalogram [EEG] results) and R94.02 (abnormal electromyogram [EMG] results), which have their own specific codes.
• Always seek clarification from the provider if the specific type of CNS function study or the nature of the abnormality is unclear in the documentation.