In simple words: If a doctor or other qualified healthcare professional needs more than 30 minutes to give and score two or more psychological or neuropsychological tests, this code is used for each additional 30 minutes.

Psychological or neuropsychological test administration and scoring by physician or other qualified health care professional, two or more tests, any method; each additional 30 minutes (List separately in addition to code for primary procedure)

Example 1: A patient with suspected ADHD undergoes a comprehensive neuropsychological evaluation including several tests like the Conners' Continuous Performance Test and the Wechsler Intelligence Scale for Children. The initial test administration and scoring take one hour (reported with 96136), and an additional 30 minutes are needed to complete all tests (96137)., A patient suspected of having early-onset dementia is given a battery of cognitive tests.The physician spends 1 hour and 30 minutes administering and scoring the tests. 96136 is used for the first hour with 96137 being reported for the additional 30 minutes., A patient with a traumatic brain injury undergoes neuropsychological testing to assess cognitive deficits.If the testing requires one hour and a half of administration and scoring, code 96136 would be used for the first hour and code 96137 would be used for the additional 30 minutes.

Documentation should include the type and number of tests administered, the total time spent on administration and scoring, the patient's performance on each test, and the results interpretation.