PHM Glossary: N

National Committee for Quality Assurance (NCQA)

The National Committee for Quality Assurance is a private, not-for-profit organization dedicated to improving health care quality. NCQA is active in quality oversight and improvement initiatives at all levels of the health care system. NCQA assesses and reports on quality through accreditation and performance measurement programs. To earn NCQA accreditation, a health plan must report on its performance in selected areas, including member satisfaction, quality of care, access, and service.


NCQA Home Page. National Committee for Quality Assurance. 23 Feb. 2006

National provider identifier (NPI)

NPI is a unique standard for health care providers and suppliers in the United States, mandated by Administrative Simplification provisions contained in Title II of the Health Insurance Portability and Accountability Act of 1996 (HIPAA – PL 104-191) .


(HIPAA – PL 104-191)

Nationwide Health Information Network (NHIN)

NHIN is a federal initiative originally launched in 2005 under the auspices of the Office for the National Coordinator of Healthcare Information Technology (ONCHIT), renamed the Office of the National Coordinator (ONC). The NHIN represents local, regional and state-level health information exchange organizations (HIOs) and integrated delivery systems working to develop standards and policies for the secure exchange of electronic health information and the infrastructure for interoperability. It supports a collection of standards, protocols, legal agreements, specifications, and services that enables the secure exchange of health information over the Internet.


The upper portion of a fraction or measure used to calculate a rate, proportion, or ratio is referred to as the numerator. In evaluation of population health management programs, the numerator often describes the population involved in the intervention or its behavior (such as compliance, claim activity, etc.).

The numerator represents the portion of the denominator population that is both eligible for and participating in the population health management program. For example, the number of individuals with diabetes in a health plan who have opted in to the chronic care management program would appear in the numerator.


If the 1-year incidence ratio of cancer in a given population is 1/10, this means that 1 person out of every 10 contracts cancer in that year; 1 is the numerator.