POS Name Description Effective or Last Revised Date Medicare Payment Rate 01 Pharmacy A facility or location where drugs and other medically related items and services are sold, dispensed, or otherwise provided directly to patients. October 1, 2005 NF 02 Unassigned Unassigned 03 School A facility whose primary purpose is education. January 1, 2003 NF 04 Homeless Shelter A facility or location whose primary purpose is to provide temporary housing to homeless individuals (e.g., emergency shelters, individual or family shelters). January 1, 2003 NF 05 Indian Health Service Free-standing Facility A facility or location, owned and operated by the Indian Health Service, which provides diagnostic, therapeutic (surgical and nonsurgical), and rehabilitation services to American Indians and Alaska Natives who do not require hospitalization. January 1, 2003 NA