-Disability accommodation is if you need a change in regular hours, reduced regular hours, change in shift, or if other items are needed to get your job done. They do not have to accommodate this if they do not deem it "reasonable".
-Family Medical Leave would need to be on file if you have to take time off for appointments, treatments, or sick days and is paid if you have sick leave or unpaid if you do not to protected your job.

It is best to file once you have the job and need the accommodation or leave. In both cases you need documentation from a provider. Once you are hired, check with your policies, human resources, or contact an attorney about each on how to file for what you need.

I hope you get the position you want. Good luck!