What are the national patterns of health care delivery in hospital-based settings?
Conducting the National Hospital Care Survey (NHCS)
Challenge
The National Hospital Care Survey (NHCS) is tracking the latest trends affecting hospitals and health care organizations. It tracks factors that influence:
- Use of health care resources
- Quality of health care
- Variations in health care services provided to population subgroups in the U.S.
Westat operated the survey for the National Center for Health Statistics (NCHS), recruiting hospitals, collecting data, processing and harmonizing data, and constructing patient IDs that can track encounters across years.
Solution
Westat recruited 200+ hospitals to send all inpatient and emergency department data. We implemented methods to receive, process, and harmonize data from multiple sources and formats: UB-04 billing data, state-based billing standards, HL7 version 3 documents, and custom extracts from hospital electronic health record (EHR) systems. We also developed a highly scalable data pipeline to test, validate, and extract data from HL7 version 3 documents.
Westat developed and used a natural language processing (NLP) technique to synthesize provider mentions from 35,500,000 payer names collected.
We also:
- Provided preliminary datasets to respond to the need for rapid data
- Supported efforts to validate algorithms to identify opioid involvement
Results
More than 81 million records have been processed, harmonized, and delivered.
Data gathered will help provide accurate and reliable health care statistics that answer key questions of interest to health care and public health professionals, researchers, and health care policymakers.
These data will contribute to the Substance Abuse and Mental Health Services Administration’s (SAMHSA’s) Emergency Department Surveillance System (SEDSS).
Data will provide statistics on the nation’s opioid epidemic as well as other prescription and illicit drug use and abuse.
Focus Areas
Behavioral Health Clinical Trials Drug Use Surveillance Health Services Research and Health Policy Opioids Public HealthCapabilities
Advanced Technologies Data Collection Data Harmonization and Data Linkage Data Science and AI Natural Language Processing and Text Analytics Statistical Methods-
Perspective
Westat Shares Survey Expertise at AAPOR 2026May 2026
Westat experts will be presenting at the 81st Annual American Association for Public Opinion Research (AAPOR) Conference, taking place in Los Angeles, California, May 13–15. They…
-
Perspective
Westat’s Data Governance in PracticeApril 2026
Westat’s reputation for delivering consistently reliable, high-quality data is grounded in our approach to strong data governance. Our data governance policy embeds key principles and…
-
Perspective
Food Is Medicine: Bringing Nutrition to the Center of HealthcareApril 2026
Diet-related chronic diseases such as diabetes, hypertension, and heart disease remain leading contributors to preventable illness and rising healthcare costs. Food Is Medicine programs offer…