As used in this chapter:

1. (a) “Appeals board” means the Workers’ Compensation Appeals Board. The title of a member of the board is “commissioner.”
2. (b) “Administrative director” means the Administrative Director of the Division of Workers’ Compensation.
3. (c) “Division” means the Division of Workers’ Compensation.
4. (d) “Medical director” means the physician appointed by the administrative director pursuant to Section 122.
5. (e) “Qualified medical evaluator” means physicians appointed by the administrative director pursuant to Section 139.2.