What you have to prove
FEV1 at or below SSA's table values, which are based on your height. For a 5'8" adult, FEV1 ≤ 1.45 L meets the listing. Also qualifies with chronic impairment of gas exchange (ABG values) or hospitalizations for respiratory failure.
Medical evidence SSA expects
Spirometry (post-bronchodilator), arterial blood gas studies, high-resolution CT, and hospitalization records. Spirometry must be performed under SSA-compliant conditions.
Common misconceptions
Home pulse-oximeter readings aren't accepted — SSA wants formal ABG results. Smoking history doesn't disqualify you, but continued smoking may be used in credibility assessments.
Didn't meet the listing? You can still qualify via a Medical-Vocational
Allowance — SSA's determination that your residual functional capacity, combined with
your age, education, and work history, leaves no jobs you can do. See our
appeals guide for what to do after an initial denial.