Wash. Admin. Code § 388-449-0035
(1) "Severity rating" is a rating of the extent of your impairment and how it impacts your ability to perform basic work activities. The following chart provides a description of limitations on work activities and the severity ratings assigned to each.
| Effect on Work Activities | Degree of Impairment | Numerical Value |
| (a) There is no effect on your performance of one or more basic work-related activities. | None | 1 |
| (b) There is no significant limit on your performance of one or more basic work-related activities. | Mild | 2 |
| (c) There are significant limits on your performance of one or more basic work-related activities. | Moderate | 3 |
| (d) There are very significant limits on your performance of one or more basic work-related activities. | Marked | 4 |
| (e) You are unable to perform basic work-related activities. | Severe | 5 |
(3) A contracted doctor reviews your medical evidence and the ratings assigned to your impairment when:
(4) The contracted doctor reviews your medical evidence, severity rating, and functional assessment to determine whether:
(5) If the medical provider's description of your impairment(s) is not consistent with the objective evidence, we will:
[Statutory Authority: 2014 c 218, 2011 1st sp.s. c 15, RCW 74.04.005, 74.04.050, 74.04.055, 74.04.057, 74.08.090, 74.08A.100, 74.04.770, 74.62.030, 41.05.021, 74.09.035, and 74.09.530. WSR 15-03-031, § 388-449-0035, filed 1/12/15, effective 2/12/15. Statutory Authority: RCW 74.04.005, 74.04.050, 74.04.055, 74.04.057, 74.08.090, 74.08A.100, 74.04.770, 74.62.030, and 2013 2nd sp.s. c 10. WSR 13-24-040, § 388-449-0035, filed 11/26/13, effective 1/1/14. Statutory Authority: RCW 74.04.005, 74.04.050, 74.04.055, 74.04.057, 74.04.510, 74.08.090, 74.08A.100, 74.04.770, 74.04.0052, 74.04.655, 74.08.043, 74.08.335, and 2011 1st sp.s. c 36. WSR 12-10-042, § 388-449-0035, filed 4/27/12, effective 6/1/12.]