Foremost in the minds of job seekers with a disability is this question: "When should I disclose my disability?" When should I ask for an accommodation?" The following details both ADA requirements as well as best practices:
What medical questions can employers ask on job applications?
Employers cannot ask disability-related questions before an offer of employment is made. In general, this means that employers cannot ask questions on a job application that are likely to elicit information about a disability. For example, employers cannot ask whether an applicant has a physical or mental impairment, has received workers compensation, or was ever addicted to illegal drugs. For more examples, visit Pre-Offer, Disability-Related Questions: Dos and Don'ts at http://www.jan.wvu.edu/media/preofferfact.doc.
For additional information about pre-employment medical questions, see Pre-Employment Disability-Related Inquiries and Medical Exams at http://www.eeoc.gov/policy/docs/preemp.html.