This case-sensitive code system http://hl7.org/fhir/us/cdmh/CodeSystem/pcornet-admitting-source-facility-type-codes defines the following codes:

Code	Display	Definition
AF	Adult Foster Home	Admitting Source is Adult Foster Home.
AL	Assisted Living Facility	Admitting Source is Assisted Living Facility.
AV	Ambulatory Visit	Admitting Source is Ambulatory Visit.
ED	Emergency Department	Admitting Source is Emergency Department.
ES	Emergency Medical Service	Admitting Source is Emergency Medical Service.
HH	Home Health	Admitting Source is Home Health
HO	Home/Self Care	Admitting Source is Home/Self Care.
HS	Hospice	Admitting Source is Hospice.
IP	Other Acute Inpatient Hospital	Admitting Source is Other Acute Inpatient Hospital.
NH	Nursing Home (Includes ICF)	Admitting Source is Nursing Home (Includes ICF).
RH	Rehabilitation Facility	Admitting Source is Rehabilitation Facility.
RS	Residential Facility	Admitting Source is Residential Facility.
SN	Skilled Nursing Facility	Admitting Source is Skilled Nursing Facility.
IH	Intra-hospital	Admitting Source is Intra-hospital.
NI	No information	Admitting Source is No information.
UN	Unknown	Admitting Source is Unknown.
OT	Other	Admitting Source is Other.