GP v Accident Compensation Corporation (Impairment Assessment) [2023] NZACC 55 [pdf, 194 KB]
...chapter 14 mental injury impairment measuring tool, Dr Hill is required by the Handbook to the AMA guides to consider apportionment for noncovered factors and to avoid duplicating the physical impairment rating. • Dr Hill has explained how he has formed the opinion that apportionment of 10% is required because of the impairing effect of the client's regular marijuana use as measured by the chapter 14 mental injury impairment measuring tool. • The handbook directs Dr Hil...