You want to read all of 3.00 and then the appropriate Listing, I'm guessing 3.02 Chronic Respiratory Disorders: 3.-Respiratory-Adult

SS is very specific about the requirements for test type, as well as how it's performed and documented. Since you were denied at the initial level, in all likelihood you either didn't have the test documented as needed, you don't meet the Listing requirements or SS didn't receive the medical documentation.

Those that are approved at the initial stage usually meet a Listing. Those that are 50 or older and meet other requirements are sometimes approved quickly as well, but 2/3 of applicants are denied at the first stage. Reconsideration approval rates are a little over 10% and approvals mostly occur when new medical documentation is submitted that helps a claimant meet a Listing or helps with the GRID.

There is also a full 5 Step Sequential Evaluation Process that is used to approve or deny SSI/SSDI benefits, but it usually will require an ALJ hearing which takes a couple of years. https://www.ssa.gov/oidap/Documents/...Evaluation.pdf

So, if you might possibly meet a Listing, but require new testing be performed, I would suggest you request your case worker allow you time to schedule it and get the results back. Since you're already scheduled for more testing, verify if it will be what SS requires and if not, see if it can be.