National Personal Injury Authority - Personal Injury Law Authority Reference
Personal injury law governs the legal rights of individuals who suffer physical, psychological, or financial harm caused by the negligent or intentional acts of another party. This page covers the definition and scope of personal injury claims under U.S. civil law, the procedural framework through which such claims are resolved, the factual scenarios that most frequently generate litigation, and the decisional thresholds that determine when a claim proceeds or fails. Readers seeking foundational orientation to the broader civil justice system should consult the conceptual overview of how the U.S. legal system works before proceeding.
Definition and scope
Personal injury law is a branch of tort law — the body of civil rules imposing liability for harm caused outside of contractual relationships. Under Restatement (Third) of Torts: Liability for Physical and Emotional Harm published by the American Law Institute, a tortfeasor becomes liable when conduct breaches a duty of reasonable care and that breach is the proximate cause of cognizable injury to another person.
The scope of recoverable harm extends across four principal categories:
- Physical injury — bodily harm including fractures, spinal cord damage, traumatic brain injury, and burns
- Psychological injury — diagnosable conditions such as post-traumatic stress disorder arising from a qualifying incident
- Economic loss — lost wages, medical expenses, and diminished earning capacity
- Non-economic loss — pain and suffering, loss of consortium, and loss of enjoyment of life
Personal injury claims are governed almost entirely by state common law and state statutory codes. No single federal personal injury statute exists; instead, federal jurisdiction attaches only when diversity of citizenship is present (28 U.S.C. § 1332) or when a federal agency's conduct or a federally regulated product is at issue. The regulatory context for the U.S. legal system provides broader framing on the interplay between federal and state authority.
Statute-of-limitations periods — the window within which a claim must be filed — vary by state. California sets a 2-year general personal injury limitations period (Cal. Code Civ. Proc. § 335.1). Texas maintains a 2-year period under Tex. Civ. Prac. & Rem. Code § 16.003. New York imposes a 3-year limitations period for most personal injury actions under N.Y. C.P.L.R. § 214.
State-by-state reference resources in this network document these variations with precision. Alabama Legal Services Authority covers Alabama's tort framework, including its contributory negligence doctrine — one of only 4 U.S. jurisdictions still applying the pure bar to recovery. Alaska Legal Services Authority addresses Alaska's modified comparative fault rules and its unique venue considerations for remote-area incidents.
How it works
A personal injury claim proceeds through a structured sequence of legal phases. The framework below reflects the standard process in U.S. state civil courts, as described in the Federal Rules of Civil Procedure (applicable in federal courts) and analogous state procedural codes.
Phase 1 — Incident and preservation
Within days of an injury-causing event, the injured party (plaintiff) must preserve evidence: photographs, witness contact information, medical records, and physical objects. Spoliation of evidence — the destruction or failure to preserve material evidence — can result in adverse inference instructions against the responsible party at trial.
Phase 2 — Medical evaluation and documentation
The plaintiff undergoes evaluation by treating physicians, whose records form the medical foundation of damages calculations. Independent medical examinations (IMEs), ordered by defendants or insurers, produce competing assessments. The American Medical Association Guides to the Evaluation of Permanent Impairment are used in 38 states to rate permanent impairment for damages purposes.
Phase 3 — Claim filing and discovery
After filing a complaint in the appropriate court, both parties enter the discovery phase: written interrogatories, requests for production of documents, and depositions of witnesses and expert witnesses. Expert witnesses in personal injury litigation typically include accident reconstructionists, medical specialists, and economists.
Phase 4 — Pre-trial motions and settlement negotiations
The large majority of personal injury cases resolve before trial. According to the Bureau of Justice Statistics, approximately 97 percent of civil cases in U.S. state courts that are resolved do so through settlement, dismissal, or default rather than jury verdict.
Phase 5 — Trial or alternative dispute resolution
Cases that do not settle proceed to bench or jury trial, or are redirected to arbitration or mediation under contractual or court-ordered protocols. Arbitration Authority documents the arbitration pathway in detail, covering the rules of bodies such as the American Arbitration Association. Mediation Authority covers the mediation framework applicable when parties elect facilitated negotiation before a neutral third party.
Arizona Legal Services Authority covers Arizona's mandatory arbitration program for civil claims under $50,000, which applies to personal injury disputes and redirects them from superior court dockets. Arkansas Legal Services Authority documents Arkansas's modified comparative fault threshold and its jury instruction standards in personal injury cases.
The injury law authority resource examines foundational injury law doctrine across multiple claim types, while personal injury authority provides a structured breakdown of the claim lifecycle from incident through resolution.
Common scenarios
Personal injury litigation arises from a defined set of recurring factual patterns. The dominant categories in U.S. courts are described below.
Motor vehicle collisions
Motor vehicle accidents constitute the single largest category of personal injury claims filed in U.S. state courts. The National Highway Traffic Safety Administration (NHTSA) reported 42,939 traffic fatalities in 2021, and millions of non-fatal injury crashes that generate civil liability exposure annually. Fault allocation rules differ sharply by state: 12 states operate under no-fault insurance regimes (including Florida, Michigan, and New York), requiring plaintiffs to exhaust personal injury protection (PIP) benefits before accessing the tort system.
Florida Legal Services Authority details Florida's no-fault threshold requirements and the conditions under which a plaintiff may step outside the PIP system to pursue a tort claim. Michigan Legal Services Authority covers Michigan's restructured no-fault statute following 2019 reforms that altered PIP benefit tiers and fee schedules. New York Legal Services Authority addresses New York's serious injury threshold under Insurance Law § 5102(d), which gates access to tort recovery.
National Accident Authority covers accident-based injury claims at a national scope, and accident law authority provides doctrinal analysis of negligence per se claims that arise when a driver violates a traffic statute.
Premises liability
Property owners owe visitors a duty of care proportionate to the visitor's status. Under the traditional tripartite framework:
- Invitees (customers, business visitors) receive the highest duty — reasonable inspection and repair
- Licensees (social guests) receive a duty to warn of known hidden dangers
- Trespassers receive only a duty to refrain from willful or wanton harm, with exceptions for discovered trespassers and children under the attractive nuisance doctrine
California Legal Services Authority covers California's unified duty standard under Rowland v. Christian, 69 Cal.2d 108 (1968), which abolished the tripartite classification in that state. Illinois Legal Services Authority documents Illinois's Premises Liability Act (740 ILCS 130/) and its retention of status-based duties.
National Injury Authority consolidates premises liability doctrine across all 50 states, with comparative analysis of duty standards.
Medical malpractice
Medical malpractice claims arise when a licensed health care provider departs from the standard of care recognized within the relevant medical specialty, causing patient harm. The standard of care is established through expert testimony benchmarked against practices accepted by a reasonably competent practitioner in the same or similar community.
Medical Malpractice Authority provides a structured analysis of the four-element proof framework: duty, breach, causation, and damages. National Medical Malpractice Authority maps state-specific damage caps — 31 states impose statutory limits on non-economic damages in medical malpractice cases, with caps ranging from $250,000 in California (MICRA, Cal. Civ. Code § 3333.2) to $750,000 in Texas ([Tex. Civ. Prac. & Rem. Code § 74.301](https://statutes.capitol.texas.gov