Section 416.911 - Definition of disabling impairment(a) If you are an adult:(1) A disabling impairment is an impairment (or combination of impairments) which, of itself, is so severe that it meets or equals a set of criteria in the Listing of Impairments in appendix 1 of subpart P of part 404 of this chapter or which, when considered with your age, education and work experience, would result in a finding that you are disabled under § 416.994 , unless the disability redetermination rules in § 416.987(b) apply to you.(2) If the disability redetermination rules in § 416.987 apply to you, a disabling impairment is an impairment or combination of impairments that meets the requirements in §§ 416.920 (c) through (f) .(b) If you are a child, a disabling impairment is an impairment (or combination of impairments) that causes marked and severe functional limitations. This means that the impairment or combination of impairments:(1) Must meet, medically equal, or functionally equal the listings, or(2) Would result in a finding that you are disabled under § 416.994a .(c) In determining whether you have a disabling impairment, earnings are not considered.62 FR 6421, Feb. 11, 1997, as amended at 65 FR 54777 , Sept. 11, 2000