"Severity of a physical impairment" means the degree that an impairment restricts you from performing the basic work-related activities in WAC 388-447-0001. Severity ratings range from one to five, with five being the most severe. We assign severity ratings based on the table in WAC 388-447-0020.

(1) We assign to each physical impairment a severity rating that is supported by medical evidence.

(2) If your physical impairment is rated two, and there is no mental impairment or a mental impairment that is rated one, we deny incapacity.

(3) If your physical impairment is rated five, we approve incapacity.