Return to work documentation after LOA

[Guest Testrella]

We are a Home Care Agency. We are in the process of revising our LOA Policy and return to work process. Is it appropriate to ask an employee who takes a loa for medical reasons to submit a medical note that details their functions as a home health aide and not request the same for others who are returning from medical leaves that we determine would not affect their ability to perform their duties. Are there any legal ramifications and how does it apply to ADA.