Oklahoma

Personal injury, wrongful death, and property damage claims must be filed within two years of accrual under 12 O.S. § 95(A)(3). The two-year tort framework aligns Oklahoma with the catalog's two-year-PI majority (CO, GA, IL, TX, NV, AZ, CT, KS, LA post-July 2024, FL post-HB 837). The discovery rule applies to latent injury claims where the plaintiff could not reasonably have discovered the injury within the standard period.

Medical malpractice claims operate under a special framework at 76 O.S. § 18: two years from discovery and three years from the act or omission, with the three-year outer bound operating as an absolute cap. The 2/3 framework is more defense-favorable than the standard tort SOL for late-discovered injuries. The three-year outer cap parallels California's three-year, Connecticut's three-year, and Louisiana's three-year med mal repose frameworks, and is shorter than Illinois's four-year, Kansas's four-year, Georgia's five-year, Massachusetts's seven-year, or Texas's ten-year repose periods.

Written contract claims must be filed within five years of breach under 12 O.S. § 95(A)(1). Oral contract claims must be filed within three years of breach under 12 O.S. § 95(A)(2). Oklahoma's five-year written contract period aligns with Kansas's framework and is shorter than the catalog majority (NY, MA, NV, AZ, CT, all at six years) but longer than Colorado's three-year period.

UCC sale-of-goods claims operate under a five-year period under 12A O.S. § 2-725, rather than the four-year period that is the national default under the Uniform Commercial Code. Oklahoma is one of only a few US jurisdictions that adopted the optional five-year UCC SOL alternative when adopting Article 2. The five-year UCC period is operationally distinctive: practitioners with cross-state UCC exposure must verify whether Oklahoma's five-year period or the four-year period applicable in most other states governs the claim.

Fraud claims must be filed within two years under 12 O.S. § 95(A)(3), with the discovery rule providing that accrual is delayed until the plaintiff discovered or should have discovered the fraud through reasonable diligence. Oklahoma's two-year fraud period is shorter than the three-year fraud period in most catalog states (NM, TX, FL, CO, CT, AZ, NV) and aligned with Kansas's two-year fraud framework.

Defamation (libel and slander) operates under a one-year period under 12 O.S. § 95(A)(4). Oklahoma's one-year defamation period aligns with the catalog majority (NY, CA, DC, GA, IL, CO, TX, AZ, KS) and is more defense-favorable than the two-year periods in Florida, Nevada, and Connecticut or the three-year periods in Massachusetts, New Mexico, and Louisiana (post-July 2024). Governmental Tort Claims Act requirements under 51 O.S. § 151 et seq. (covered separately) impose additional procedural deadlines for claims against governmental entities that operate independently of these general SOL periods.

Oklahoma applies a modified comparative fault framework under 23 O.S. § 13. A plaintiff whose contributory negligence is greater than the combined negligence of the defendants is barred from recovery. A plaintiff whose negligence is 50 percent or less recovers damages reduced by their proportionate share of fault. The 51-percent bar framework parallels Texas (Chapter 33), Illinois (§ 2-1116), Florida (post-HB 837 § 768.81), Massachusetts (G.L. c. 231 § 85), New York (CPLR Article 16 several liability), Nevada (NRS 41.141), Connecticut (C.G.S. § 52-572h), and the broader 51-percent bar majority.

Oklahoma's 51-percent bar framework places Oklahoma in the catalog modified comparative majority, distinct from the 50-percent bar minority (CO, KS, UT, TN), where plaintiffs are barred at equal fault. The operational difference at the 50/50 threshold matters in single-defendant cases: Oklahoma plaintiffs at 50 percent fault recover reduced damages, while Kansas, Colorado, Utah, and Tennessee plaintiffs at the same percentage are barred entirely.

Several liability is the default rule under 23 O.S. § 15. Each defendant is liable only for the percentage of damages attributable to that defendant's fault as determined by the trier of fact. The several-only framework was established through tort reform legislation that has been refined over time. The combination of modified comparative fault and several-only liability creates a defense-favorable damages allocation framework, comparable to Texas's Chapter 33 framework, Florida's post-HB 837 framework, Connecticut's § 52-572h framework, and Nevada's NRS 41.141 framework.

Under 23 O.S. § 15, fault may be allocated to settling parties and parties not named in the lawsuit, similar to the nonparty allocation frameworks in Nevada (NRS 41.141), Arizona (A.R.S. § 12-2506(B)), Connecticut (C.G.S. § 52-572h(c)), and Kansas (K.S.A. § 60-258a). The framework requires defendants to identify and develop evidence about other potentially responsible parties to maximize the allocation of fault away from named defendants.

Joint and several liability is preserved for specific categories under Oklahoma law, including concert of action and civil conspiracy (where defendants act in concert to commit a tort), certain intentional torts, and statutory categories where joint and several liability is expressly preserved. In these categories, defendants remain jointly and severally liable for the full amount of damages, regardless of the comparative fault allocation. The categorical preservation operates as a substantive exception to the otherwise broad several-only framework.

Oklahoma adopted modified comparative fault by statute in 1973 (23 O.S. § 13), replacing the prior contributory negligence rule. The 1973 adoption was part of the broader nationwide trend toward comparative fault frameworks during the early 1970s, aligning Oklahoma with the same wave of statutory adoptions as Connecticut (1973), Kansas (1974), and Nevada (1973). The Oklahoma approach (statutory modified comparative with 51-percent bar) differs from the judicial pure comparative adoptions in California (Li v. Yellow Cab, 1975), New Mexico (Bartlett v. New Mexico Welding, 1982), and Tennessee (McIntyre v. Balentine, 1992).

Oklahoma's Governmental Tort Claims Act under 51 O.S. § 151 et seq. governs tort claims against the State of Oklahoma, political subdivisions, school districts, and other governmental entities. Section 156 requires written notice of the claim to be presented within one year of the date the loss occurs. The one-year notice period falls between the longer presentment frameworks (MA 2-year, FL 3-year) and the shorter notice frameworks (CA 6-month, GA 6-month, TX 6-month, DC 6-month, AZ 180-day, NM 90-day) among catalog states.

The notice must be presented in writing to the appropriate office of the governmental entity. For State claims, the notice is presented to the Office of the Risk Manager or other designated office. For political subdivision claims (counties, cities, school districts), the notice is presented to the clerk or governing body. The notice must contain specific content under 51 O.S. § 156(D): the date, time, place, and circumstances of the claim, the identity of the parties involved, the nature and extent of the damages, and other information sufficient to allow the governmental entity to investigate the claim.

After presentment, the governmental entity has 90 days to act on the claim under 51 O.S. § 157(A). The entity may approve the claim, deny the claim, or fail to act within the 90-day period (in which case the claim is deemed denied). The 90-day response period operates as a procedural step that delays filing of any lawsuit and provides the governmental entity an opportunity to investigate, settle, or formally deny the claim.

Notice content requirements are strictly construed. Notices that fail to describe the claim with sufficient specificity, that omit material information, or that misidentify the governmental entity have been invalidated. Practitioners must ensure complete and accurate notice content within the one-year period, since content failures can bar the claim independently of timing compliance.

After denial (or expiration of the 90-day response period without action), the claimant must commence suit within 180 days under 51 O.S. § 157(B). The 180-day filing window is operationally distinctive: most catalog states provide either the general SOL period (compressed by the notice procedure) or a specific extended period. Oklahoma's 180-day window operates as a hard deadline measured from the date of denial, requiring practitioners to file suit promptly after the governmental entity acts.

The combination of the 1-year notice deadline, the 90-day response period, and the 180-day filing window creates a structured timeline for governmental tort claims that differs from the more flexible notice-then-general-SOL frameworks in other catalog states. Missing any of the three deadlines bars the claim independently. The framework is more procedurally demanding than Massachusetts's MTCA (which allows the general two-year SOL after presentment) but provides more time than Arizona's compressed framework (180-day notice + 1-year SOL).

51 O.S. § 154 imposes statutory damages caps on GTCA claims: $175,000 per claimant for personal injury and wrongful death claims, and $1,000,000 in the aggregate for any number of claims arising out of the same act or occurrence. The per-claimant cap aligns with the per-claimant approaches in Florida ($200,000), Nevada ($200,000), Massachusetts ($100,000), and Arizona's various frameworks. The $1,000,000 per-occurrence aggregate cap is more generous than Kansas's $500,000 per-occurrence cap but operates similarly to limit recovery in mass tort matters involving multiple claimants from a single incident.

The GTCA also preserves immunity for specific categories of conduct, including discretionary functions, legislative and judicial functions, certain inspection activities, and other categorical immunities under 51 O.S. § 155. The categorical immunities operate as substantive defenses regardless of compliance with the procedural notice framework. Punitive damages are not recoverable against governmental entities under the GTCA, paralleling the punitive damages bars in Nevada (NRS 41.035) and other catalog states with sovereign immunity frameworks.

Oklahoma's Medicaid False Claims Act under 63 O.S. § 5053 et seq. provides the state's primary false claims framework, focused specifically on Medicaid fraud. The statute creates civil penalties and treble damages for false claims against the Oklahoma Medicaid program, with qui tam provisions allowing private relators to bring actions on behalf of the state.

Oklahoma's Medicaid-only framework is narrower than the broad qui tam False Claims Acts in many other catalog states (NY, CA, IL, GA, MA, NM, TX, NV, CT, OR, TN). Oklahoma joins Colorado, Arizona, Louisiana, Utah, and Washington in the Medicaid-only state FCA camp, where qui tam relator actions are limited to healthcare fraud claims rather than spanning the broader range of state contract fraud, tax fraud, and procurement fraud covered by general FCA frameworks.

The Oklahoma Medicaid False Claims Act includes qui tam provisions allowing private individuals (relators) to bring civil actions on behalf of the State of Oklahoma against parties alleged to have submitted false claims to the Oklahoma Medicaid program. Relators must file actions under seal and serve the Oklahoma Attorney General with the complaint and supporting evidence. The Attorney General has the right to intervene in the action and pursue it directly, or to allow the relator to continue the action.

Successful qui tam actions provide relators with a percentage of the state's recovery, typically ranging from 15 to 25 percent depending on the level of relator involvement and whether the Attorney General intervened. The relator percentage framework parallels the federal False Claims Act qui tam structure and similar state FCA provisions in other catalog states.

Successful actions under the Oklahoma Medicaid False Claims Act may recover treble damages (three times the amount of actual damages caused by the false claims), civil penalties per violation, attorney's fees and costs, and investigation costs. The treble damages provision and civil penalties framework parallels the federal False Claims Act remedies. The combined remedies create significant exposure for defendants in Medicaid fraud actions.

Medicaid is a joint federal-state program, so Oklahoma Medicaid fraud cases often involve coordinated federal-state action under both the federal False Claims Act (31 U.S.C. § 3729 et seq.) and the Oklahoma Medicaid False Claims Act. Federal and state prosecutors frequently coordinate investigations, and qui tam actions may proceed in federal court (for federal FCA claims involving Medicaid's federal match) and state court (for state FCA claims involving state Medicaid funds) simultaneously. Practitioners with Oklahoma Medicaid fraud exposure must understand the coordination between federal and state frameworks and the strategic implications of parallel actions.

Oklahoma is one of only two United States jurisdictions that operate bifurcated high courts: the Oklahoma Supreme Court (civil and most other matters) and the Oklahoma Court of Criminal Appeals (criminal matters). The framework was established in the Oklahoma Constitution of 1907 (Article VII) and remains in effect today. Texas is the only other US state with a comparable bifurcated structure, established by the 1876 Texas Constitution.

The bifurcated framework distinguishes Oklahoma and Texas from all other US states, which operate single supreme courts with jurisdiction over both civil and criminal matters. The framework reflects historical concerns about the burden of criminal appeals on civil case management and the perceived benefits of judicial specialization between civil and criminal subject matter. For commercial litigation practitioners, the framework has practical implications for case strategy in matters involving both civil and criminal dimensions.

The Oklahoma Supreme Court has appellate jurisdiction over all civil and equitable matters, including commercial litigation, insurance disputes, tort claims, contract disputes, family law, and most administrative agency appeals. The Court also has jurisdiction over constitutional questions arising in civil contexts, mandamus and prohibition proceedings, and the regulation of the practice of law in Oklahoma. The Court consists of nine Justices selected through judicial nominating commission appointments and subject to retention elections.

The Oklahoma Court of Civil Appeals serves as the intermediate appellate court for civil matters, with three divisions across the state. Most civil appeals from district courts go to the Court of Civil Appeals, with discretionary review available at the Oklahoma Supreme Court. The framework provides for efficient civil case management while reserving final appellate review for the Supreme Court in cases of broader legal significance.

The Oklahoma Court of Criminal Appeals has exclusive appellate jurisdiction over criminal matters, including criminal convictions, capital cases, post-conviction relief proceedings, and habeas corpus petitions arising from criminal cases. The Court consists of five judges selected through the same judicial nominating commission framework as the Supreme Court. The Court of Criminal Appeals is the court of last resort for criminal matters in Oklahoma, with further review available only through the United States Supreme Court for federal constitutional questions.

The bifurcated framework creates occasional jurisdictional questions in matters that touch on both civil and criminal subject matter. Civil suits arising from underlying criminal conduct (assault, fraud, certain regulatory violations) generally go to the Supreme Court chain, while criminal matters with collateral civil consequences (asset forfeiture appeals in certain contexts, civil contempt arising from criminal proceedings) require careful jurisdictional analysis.

The two courts can develop divergent jurisprudence in areas where their jurisdictions overlap or where similar legal principles arise in civil and criminal contexts (search and seizure issues in civil forfeiture vs. criminal cases, evidentiary standards, statutory interpretation of provisions appearing in both civil and criminal codes). Practitioners advising on Oklahoma matters must identify the appropriate appellate path early in case planning and consider whether parallel civil and criminal proceedings may require coordinated strategy across both court systems.