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📊 '''National Council on Compensation Insurance (NCCI)''' is the leading [[Definition:Rating organization | rating and advisory organization]] for [[Definition:Workers' compensation insurance | workers' compensation insurance]] in the United States, providing [[Definition:Loss cost | loss costs]], [[Definition:Classification code | classification systems]], and statistical analysis to insurers and regulators in the majority of states. Functioning as an independent, not-for-profit entity, NCCI collects [[Definition:Premium | premium]] and [[Definition:Loss | loss]] data from carriers writing workers' compensation, aggregates it into industry-level benchmarks, and publishes recommended rate components that individual states use as a foundation for their own [[Definition:Rate filing | rate-making]] processes.

⚙️ At the operational level, NCCI manages the classification system that assigns each employer to a specific risk category based on the nature of its work — a steelworker classification carries a vastly different expected injury profile than an office-based clerical class. Using the aggregated data, NCCI calculates [[Definition:Loss cost | loss costs]] (the pure expected cost of claims, without [[Definition:Expense loading | expense loads]] or [[Definition:Profit margin | profit margins]]) and files them with state regulators, who may adopt them directly or use them as a starting point for approved rates. NCCI also administers the [[Definition:Experience rating | experience rating]] system — the mechanism that adjusts an individual employer's premium based on its own [[Definition:Loss experience | loss history]] relative to similarly classified businesses — and maintains tools like the [[Definition:Experience modification rate (EMR) | experience modification rate]] calculation that directly affects what employers pay.

🔑 While some states — notably California, New York, and Pennsylvania — operate their own independent [[Definition:Rating bureau | rating bureaus]], NCCI serves as the primary workers' compensation data and advisory resource in roughly 38 jurisdictions. Its annual State of the Line report is closely watched by [[Definition:Underwriting | underwriters]], [[Definition:Actuary | actuaries]], and regulators as a barometer of the workers' compensation market's health, covering trends in [[Definition:Claims frequency | claim frequency]], [[Definition:Loss severity | severity]], [[Definition:Medical cost | medical costs]], and [[Definition:Combined ratio | combined ratios]]. For carriers entering or expanding in the workers' compensation market, NCCI's data and classification frameworks are indispensable infrastructure — reducing the burden of independent rate development and enabling consistent treatment of risks across state lines.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Workers' compensation insurance]]
* [[Definition:Experience rating]]
* [[Definition:Loss cost]]
* [[Definition:Classification code]]
* [[Definition:Rating organization]]
* [[Definition:Experience modification rate (EMR)]]
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Definition:National Council on Compensation Insurance (NCCI) - Revision history

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