Insurance Claims Glossary: Key Terms and Definitions

The insurance claims process involves a dense vocabulary that shapes how policyholders, adjusters, and regulators interpret coverage disputes, settlement negotiations, and legal obligations. This glossary covers the foundational terms used across property, liability, health, auto, life, and commercial lines. Precise understanding of these definitions directly affects outcomes during the insurance claims process and determines whether a claim is approved, contested, or denied.

Definition and scope

Insurance claims terminology encompasses the contractual, regulatory, and procedural language embedded in policy documents, state insurance codes, and federal frameworks. The National Association of Insurance Commissioners (NAIC) publishes model laws and a glossary of standard insurance terms adopted, in varying forms, by state insurance departments across all 50 U.S. jurisdictions.

Core definitions used across claim types:

• Claim — A formal request submitted by a policyholder or beneficiary to an insurer for payment of a loss covered under an active policy.
• Policyholder / Insured — The individual or entity named in the insurance contract who holds coverage rights.
• Premium — The periodic payment made to maintain a policy in force, as defined under 15 U.S.C. § 1012 (McCarran-Ferguson Act), which reserves primary insurance regulation to the states.
• Deductible — The out-of-pocket amount the insured must pay before insurer obligations attach. For a detailed treatment, see Insurance Deductibles and Claims.
• Coverage limit — The maximum dollar amount an insurer will pay for a covered loss under a given policy period or per-occurrence basis.
• Exclusion — A contractual provision that removes specific perils, persons, or property from coverage scope.
• Endorsement / Rider — A written amendment modifying the base policy's terms, adding or restricting coverage.
• Subrogation — The insurer's legal right, after paying a claim, to pursue recovery from the liable third party. This concept is examined further in Insurance Subrogation Explained.

How it works

Insurance claims terminology functions as the interpretive layer between a policy contract and a claim outcome. Adjusters, courts, and regulators apply these definitions in a structured sequence:

1. Notice of loss — The insured formally notifies the insurer of a covered event, triggering the insurer's duty to investigate under state prompt-payment statutes. The NAIC's Unfair Claims Settlement Practices Model Act (Model Act 900) sets the benchmark timeline standards most states have codified.
2. Proof of loss — A sworn statement detailing the amount and nature of the loss. Requirements vary by line; see Proof of Loss Requirements for specific documentation standards.
3. Coverage analysis — The adjuster applies policy definitions to determine whether the loss falls within covered perils, coverage limits, and exclusions.
4. Valuation — The claim is assigned a dollar value using one of two primary methods:
5. Actual Cash Value (ACV) — Replacement cost minus depreciation.
6. Replacement Cost Value (RCV) — The cost to repair or replace the property with like kind and quality at current prices. The distinction between these two standards is explained in detail at Actual Cash Value vs Replacement Cost.
7. Settlement or denial — The insurer issues payment, a partial payment, or a denial letter citing specific policy provisions.

Common scenarios

Different claim types activate different subsets of this vocabulary. Understanding which terms govern each context reduces disputes and accelerates resolution.

Property damage claims invoke terms like peril, concurrent causation, ordinance or law coverage, and coinsurance clause. A coinsurance clause typically requires the insured to carry coverage equal to a defined percentage — commonly 80% — of the property's insurable value or face a proportional penalty at claim time. More context is available at Property Damage Claims.

Health insurance claims rely on terms including Explanation of Benefits (EOB), in-network vs. out-of-network, prior authorization, coordination of benefits (COB), and allowed amount. The Centers for Medicare & Medicaid Services (CMS) defines many of these terms under the Affordable Care Act's Summary of Benefits and Coverage standards at 45 C.F.R. § 147.200.

Auto insurance claims engage terms like fault determination, comparative negligence, uninsured motorist (UM) coverage, diminished value, and total loss threshold. State thresholds for total loss vary: some states use a fixed percentage of pre-loss value (commonly 75–80%) while others apply a total-loss formula (TLF). See Auto Insurance Claims for state-specific framing.

Workers' compensation claims use a distinct vocabulary: compensable injury, maximum medical improvement (MMI), temporary total disability (TTD), permanent partial disability (PPD), and independent medical examination (IME). The U.S. Department of Labor administers federal workers' compensation programs; state programs operate under individual state codes.

Decision boundaries

Two classification distinctions recur across claim types and govern how coverage and liability attach:

First-party vs. third-party claims — A first-party claim is filed by the insured against their own policy (e.g., homeowner files against their property insurer). A third-party claim is filed by an injured party against the at-fault insured's liability coverage. The procedural rights, duty-to-defend obligations, and bad-faith exposure differ substantially between these pathways. For a structured comparison, see First-Party Insurance Claims and Third-Party Insurance Claims.

Occurrence vs. claims-made policies — Occurrence policies cover events that happen during the policy period regardless of when the claim is filed. Claims-made policies cover claims filed during the policy period, regardless of when the triggering event occurred. This distinction is critical in liability and professional lines and is frequently litigated under state contract law.

Named peril vs. open peril (all-risk) policies — Named peril policies cover only perils explicitly listed. Open peril policies cover all causes of loss except those explicitly excluded. The burden of proof differs: under named peril coverage the insured must prove the loss falls within a listed peril; under open peril coverage the insurer must prove an exclusion applies (NAIC Consumer's Guide to Homeowners Insurance).

Claim outcomes often pivot on how these boundary terms are defined within a specific policy form. State insurance departments — listed in the State Insurance Department Resources directory — publish consumer bulletins interpreting how these terms apply under state-approved policy forms.

References

• National Association of Insurance Commissioners (NAIC)
• NAIC Unfair Claims Settlement Practices Model Act (Model Act 900)
• NAIC Consumer's Guide to Homeowners Insurance
• Centers for Medicare & Medicaid Services (CMS)
• 45 C.F.R. § 147.200 — Summary of Benefits and Coverage (eCFR)
• U.S. Department of Labor — Office of Workers' Compensation Programs
• 15 U.S.C. § 1012 — McCarran-Ferguson Act (House.gov)