This code system http://terminology.hl7.org/CodeSystem/encounter-special-arrangements defines the following codes:

CodeDisplayDefinition
wheel WheelchairThe patient requires a wheelchair to be made available for the encounter.
add-bed Additional beddingAn additional bed made available for a person accompanying the patient, for example a parent accompanying a child.
int InterpreterThe patient is not fluent in the local language and requires an interpreter to be available. Refer to the Patient.Language property for the type of interpreter required.
att AttendantA person who accompanies a patient to provide assistive services necessary for the patient's care during the encounter.
dog Guide dogThe patient has a guide dog and the location used for the encounter should be able to support the presence of the service animal.
 <status value="draft"/> <experimental value="false"/> <date value="2021-12-02T19:54:18-07:00"/> <publisher value="FHIR Project team"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> </contact> <description value="This value set defines a set of codes that can be used to indicate the kinds of special arrangements in place for a patients visit."/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/encounter-special-arrangements"/> <content value="complete"/> <concept> <code value="wheel"/> <display value="Wheelchair"/> <definition value="The patient requires a wheelchair to be made available for the encounter."/> </concept> <concept> <code value="add-bed"/> <display value="Additional bedding"/> <definition value="An additional bed made available for a person accompanying the patient, for example a parent accompanying a child."/> </concept> <concept> <code value="int"/> <display value="Interpreter"/> <definition value="The patient is not fluent in the local language and requires an interpreter to be available. Refer to the Patient.Language property for the type of interpreter required."/> </concept> <concept> <code value="att"/> <display value="Attendant"/> <definition value="A person who accompanies a patient to provide assistive services necessary for the patient's care during the encounter."/> </concept> <concept> <code value="dog"/> <display value="Guide dog"/> <definition value="The patient has a guide dog and the location used for the encounter should be able to support the presence of the service animal."/> </concept> </CodeSystem>