The American with Disabilities Act (ADA) requires access to medical care services and the facilities where the services are provided. Private hospitals or medical offices are covered by Title III of the ADA as places of public accommodation.

Access To Medical Care For Individuals With Mobility Disabilities (PDF)
ADA.gov is a website managed by the Department of Justice. Here you can find a general overview of  requirements, commonly asked questions, guides for accessible exam rooms, and information on medical equipment requirements.

Public Accommodations and the ADA
Both for-profit and not-for-profit businesses must, by law, provide accommodations to effectively serve people with disabilities equally to those without without disabilities.

Communication and the ADA
The ADA requires businesses to communicate effectively with customers with vision, hearing, and speech disabilities.

Accessible Parking and the ADA
The law requires a accessible parking spaces that must connect to the shortest possible accessible route to the accessible building entrance or facility they serve.

Source
The ADA National Network DISABILITY LAW Handbook
The U.S. Department of Justice (DOJ) issued new regulations under the Americans with Disabilities Act (ADA) in 2010. The new rules affect state and local governments (Title II of the ADA), as well as public accommodations and commercial facilities (Title III). The regulations include the new 2010 ADA Standards for Accessible Design, outlining minimum accessibility requirements for buildings and facilities.