The National Council on Compensation Insurance--the organization responsible in many states for determining proper Workers' Compensation classifications, Experience Modification Factors, and collecting data used for ratemaking. NCCI also writes the manuals used in many states to calculate Workers' Compensation premiums, and also administers the Assigned Risk Plan in many jurisdictions. NCCI is a private organization, not connected with government, although it is often mistakenly thought to be a governmental agency.

National Council on Compensation Insurance. An association of insurers selling compensation coverage and operating as a rating organization. NCCI collects statistics, develops rates and policy forms, and makes state filings for its members.