What is considered to be a severe impairment or combination of impairments at step two of a disability application?

An impairment or combination of impairments is deemed to be severe at step two if it "significantly limits [plaintiff's] physical or mental ability to do basic work activities." 20 C.F.R. 404.1520(c), 404.1521(a). Basic work activities encompass "the abilities and aptitudes necessary to do most jobs," including "(1) physical functions such as walking, standing, sitting, lifting and carrying, (2) capacities such as seeing, hearing, and speaking, (3) understanding, carrying out, and remembering simple instructions, (4) use of judgment, (5) responding appropriately to supervision, co-workers, and usual work situations, and (6) dealing with changes in a routine work setting." 20 C.F.R. 404.1521(b). An impairment is "not severe" only if it "would have no more than a minimal effect on an individual's ability to work, even if the individual's age, education, or work experience were specifically considered." SSR 85-28. The purpose of step two is to identify claimants whose medical impairment is so slight that it is unlikely they would be disabled even if age, education, and experience were taken into account. Bowen v. Yuckert, 482 U.S. 137, 107 S. Ct. 2287 (1987). "The step-two inquiry is a de minimis screening device to dispose of groundless claims. An impairment or combination of impairments

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