Medical records are confidential. The basic rule is that with limited exceptions, employers must keep confidential any medical information they learn about an applicant or employee. Information can be confidential even if it contains no medical diagnosis or treatment course and even if it is not generated by a health care professional. For example, an employee's request for a reasonable accommodation would be considered medical information subject to the ADA's confidentiality requirements.

On July 15, 2016, Attorney General Loretta Lynch signed a final rule revising the ADA title II and III regulations to implement the requirements of the ADA Amendments Act of 2008. The final rule was published in the Federal Register on August 11, 2016, and took effect 60 days after publication, on October 11, 2016.  Congress enacted the ADA Amendments Act to clarify the meaning and interpretation of the ADA definition of “disability” to ensure that the definition of disability would be broadly construed and applied without extensive analysis.
Two agencies within the U.S. Department of Labor (DOL) enforce parts of the ADA. The Office of Federal Contract Compliance Programs (OFCCP) has coordinating authority along with the EEOC to enforce the employment-related (Title I) provisions of the law. DOL's Civil Rights Center (CRC) is responsible for enforcing Title II of the ADA. Title II bars disability-based discrimination by, and imposes affirmative disability-related responsibilities on, public entities, including state and local governments. The CRC, which is part of the Office of the Assistant Secretary for Administration and Management (OASAM), also enforces Title II with regard to the programs, services and regulatory activities connected to labor and the workforce.
The Americans with Disabilities Act of 1990 (ADA) is one of several disability-related laws and probably the one with which many Americans are most familiar. The purpose of the law is to ensure that people with disabilities have the same rights and opportunities as everyone else. The ADA guarantees this for people with disabilities in all aspects of everyday life — from employment opportunities, to being able to purchase goods and services, to participating in state and local governments' programs and services. For a quick overview of the ADA read "The Americans with Disabilities Act: A Brief Overview".
I know there may have been concerns that the ADA may be too vague or too costly, or may lead endlessly to litigation. But I want to reassure you right now that my administration and the United States Congress have carefully crafted this Act. We've all been determined to ensure that it gives flexibility, particularly in terms of the timetable of implementation; and we've been committed to containing the costs that may be incurred.... Let the shameful wall of exclusion finally come tumbling down.[41]