2012 National Healthcare Quality and Disparities Reports
Data Sources—Indian Health Service
Indian Health Service (IHS) National Data Warehouse (NDW)
Sponsor
U.S. Department of Health and Human Services, Indian Health Service.
Description
NDW is the national repository for all IHS health care data and includes information on patient registration and visit encounters. Data are derived from various government (mostly the Resource Patient Management System) and commercial health care information systems. These are largely transaction-based systems used to support patient care. NDW is an upgraded version of the National Patient Information Reporting System.
Primary Content
NDW includes registration records and all encounter records dated October 1, 2000, to the present. Registration tables contain patient information, including name, demographic data, medical chart data, aliases, and insurance eligibility data. Encounter tables contain encounter information, including location of treatment, clinic, provider, medications, and diagnosis codes.
Population Targeted
NDW collects data on approximately 1.5 million American Indians and Alaska Natives who belong to 565 federally recognized tribes in 35 States.
Demographic Data
Age, gender, and American Indian and Alaska Native status.
Years Collected
1997 to present.
Schedule
Annual.
Geographic Estimates
National IHS service area estimates are available for the following IHS regions: Aberdeen, Alaska, Albuquerque, Bemidji, Billings, Nashville, Navajo, Oklahoma, Phoenix, and Tucson. Estimates exclude the Portland and California service areas.
Notes
Since no IHS inpatient facilities are located in either the Portland or California service areas, hospitalizations from these regions are not present in the data; the denominator is correspondingly reduced.
Contact Information
Agency home page: http://www.ihs.gov.
Data system home page: http://www.ihs.gov/NDW/.
References
Berger L, Garrett Sims LTJ. Identifying polypharmacy among older adults using IHS National Data Warehouse data. IHS Primary Care Provider 2010;35(10).