This case-insensitive code system http://hl7.org/fhir/us/directory-attestation/CodeSystem/AccessibilityCS defines the following codes:

Code	Display	Definition
cultcomp	Cultural competence	Provides services that meet the social, cultural, and linguistic needs of persons.
handiaccess	handicap accessible	Provides access to persons with disabilities.
adacomp	ADA compliant	Provides access which complies with the Americans with Disabilities Act and/or amendments.
pubtrans	public transit options	Provides access using public transportation modes.
anssrvc	answering service	Provides capability to communicate when intended recipient is not immediately available.
cognitive	cognitive	Provides services for cognitively impaired persons.
mobility	mobility	Provides services for mobility impaired persons.