[{"@context":"https:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/www.mamajustice.com\/blog\/what-is-the-collateral-source-rule-in-a-memphis-car-accident-case\/#BlogPosting","mainEntityOfPage":"https:\/\/www.mamajustice.com\/blog\/what-is-the-collateral-source-rule-in-a-memphis-car-accident-case\/","headline":"What Is the Collateral Source Rule in a Memphis Car Accident Case?","name":"What Is the Collateral Source Rule in a Memphis Car Accident Case?","description":"Why Your Full Medical Bills Still Matter After a Memphis Crash Key Takeaways: Tennessee’s collateral source rule prevents at-fault drivers from reducing damages because your health insurer or auto policy paid your medical bills. Rooted in an 1896 Tennessee Supreme Court decision and reaffirmed in Dedmon v. Steelman (2017), the rule allows injured plaintiffs to...","datePublished":"2026-09-18","dateModified":"2026-09-18","author":{"@type":"Person","@id":"https:\/\/www.mamajustice.com\/blog\/author\/mamajustice\/#Person","name":"Mama Justice - MW Law Firm","url":"https:\/\/www.mamajustice.com\/blog\/author\/mamajustice\/","identifier":6,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/e447862997b79ed22fd71bb87a11629345f26dae1c12efb64a217ade91b0f64b?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/e447862997b79ed22fd71bb87a11629345f26dae1c12efb64a217ade91b0f64b?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Mama Justice - MW Law Firm","logo":{"@type":"ImageObject","@id":"https:\/\/www.mamajustice.com\/wp-content\/uploads\/2024\/08\/Mama-Justice-Logo-Desktop.png","url":"https:\/\/www.mamajustice.com\/wp-content\/uploads\/2024\/08\/Mama-Justice-Logo-Desktop.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.mamajustice.com\/wp-content\/uploads\/2026\/09\/memphis_attorney_reviewing_car_accident_insurance_policy_documents.webp","url":"https:\/\/www.mamajustice.com\/wp-content\/uploads\/2026\/09\/memphis_attorney_reviewing_car_accident_insurance_policy_documents.webp","height":768,"width":1376},"url":"https:\/\/www.mamajustice.com\/blog\/what-is-the-collateral-source-rule-in-a-memphis-car-accident-case\/","about":["Car Accidents"],"wordCount":1698,"keywords":["Car Accidents"],"articleBody":"Why Your Full Medical Bills Still Matter After a Memphis CrashKey Takeaways: Tennessee’s collateral source rule prevents at-fault drivers from reducing damages because your health insurer or auto policy paid your medical bills. Rooted in an 1896 Tennessee Supreme Court decision and reaffirmed in Dedmon v. Steelman (2017), the rule allows injured plaintiffs to submit full, undiscounted medical bills as proof of reasonable expenses while barring defendants from pointing to negotiated insurance discounts. Defendants may challenge whether treatment was necessary, reasonable, and related to the crash. The Hospital Lien Act case West v. Shelby County Healthcare Corp. does not control ordinary auto claims. The medical malpractice exception under Tenn. Code Ann. \u00a7 29-26-119 abrogates the common law rule narrowly in health care liability actions.The collateral source rule is a Tennessee doctrine that prevents an at-fault driver from taking credit for benefits you paid to secure. It bars evidence of payments from third parties unrelated to the defendant, such as health insurers or your own auto policy, and prevents those payments from reducing your recovery.If you were hurt in a Shelby County collision and an adjuster is pressing you to accept a number based on "what insurance paid," talk with Mama Justice Law Firm before you sign anything. Call (833) 626-2587 or contact us now to discuss how Tennessee law treats your medical damages.How the Tennessee Collateral Source Rule Actually WorksTennessee’s collateral source rule operates in two directions. It functions as a damages rule, barring courts from reducing your award by benefits you received from sources collateral to the tortfeasor, and as an evidentiary rule, keeping proof of those payments from the jury. The reasoning: a wrongdoer answers for the harm they cause and should not profit from the foresight of the person they injured.Tennessee courts apply the Restatement (Second) of Torts \u00a7 920A(2) (1979) formulation. Under that section, payments or benefits a plaintiff receives from sources other than the tortfeasor are not credited against the tortfeasor’s liability.A Doctrine With Deep Tennessee RootsThe rule dates to 1896. In Anderson v. Miller, 33 S.W. 615 (Tenn. 1896), the Tennessee Supreme Court held that insurance proceeds received by the plaintiff did not diminish the defendant’s liability. The same principle governs how Memphis car accident cases value medical bills today.The Dedmon v. Steelman Collateral Source Rule ExplainedThe most important modern authority is Dedmon v. Steelman, 535 S.W.3d 431, 450-51 (Tenn. 2017). The Tennessee Supreme Court declined to alter existing law and confirmed that the collateral source rule applies in personal injury cases where the collateral benefit is private health insurance. The Dedmon decision on collateral sources is the backbone of how medical damages are proven in Tennessee injury litigation.Two practical holdings matter most. First, plaintiffs may submit evidence of full, undiscounted medical bills as proof of reasonable expenses. Second, defendants are precluded from submitting evidence of discounted rates medical providers accepted from insurers to rebut reasonableness.What Defendants May Still ArgueThe Dedmon collateral source rule does not ban challenging your bills. Defense counsel remains free to introduce competent evidence attacking whether charges were reasonable or whether treatment was necessary and related to the crash. Common defense themes include:Gaps in treatment suggesting the injury resolved or came from another eventTestimony that procedures were not medically necessaryRecords suggesting a pre-existing condition explains symptomsComparative fault arguments that may reduce recovery proportionallyDocumentation drives outcomes. Consistent treatment, clear referrals, and provider testimony tying care to the collision carry more weight than raw billing totals alone.\ud83d\udca1 Pro Tip: Keep every itemized bill, explanation of benefits, and provider statement in one folder from day one. Reconstructing billing records months later is a common avoidable headache.Why West v. Shelby County Healthcare Corp. Does Not Control Your CaseInsurers sometimes cite West v. Shelby County Healthcare Corp., 459 S.W.3d 33, 44-46 (Tenn. 2014), to argue you can only recover what was paid. West involved hospital liens where billed charges substantially exceeded discounted amounts hospitals accepted from insurers, and the Court held that "reasonable charges" under the Hospital Lien Act meant those discounted amounts.The holding was tied to the Hospital Lien Act. In Dedmon, the Tennessee Supreme Court explained that West was not intended to apply in personal injury cases, so the discounted-amount definition does not carry over to ordinary auto collision claims. Understanding that distinction can be the difference between fair valuation and badly undervalued compensation, a recurring theme across our Memphis injury law insights.Legal ContextHow Past Medical Damages Are Generally MeasuredHospital Lien Act claims (West)Discounted amount agreed between hospital and insurerHealth care liability actionsGoverned by Tenn. Code Ann. \u00a7 29-26-119, construed narrowlyOrdinary car accident claims (Dedmon)Full, undiscounted billed charges as proof of reasonable valueThe Medical Malpractice Carve-Out Every Reader Should KnowTennessee’s legislature abrogated the common law collateral source rule only in one arena. Under Tenn. Code Ann. \u00a7 29-26-119(b), "in all health care liability actions, the common law collateral source rule is abrogated as specified in this section." Because that carve-out is limited to health care liability actions, the traditional rule recognized in Dedmon governs ordinary auto accident litigation.The statute defines what it limits with care. Subsection (d) limits past actual economic losses in those cases to amounts paid or to be paid by or on the claimant’s behalf and amounts providers "have accepted or will accept as full payment" pursuant to insurer agreements, government reimbursement rates, or charity programs. Tennessee courts construe \u00a7 29-26-119 strictly because it derogates common law. You can review the full text of the health care liability damages statute for complete language.Why the Distinction Changes Case ValueIn health care liability cases, recoverable past medical figures may be measured by paid or accepted amounts rather than billed charges. In typical Memphis car accident cases, plaintiffs may present the reasonable value of medical services, and the defense cannot use negotiated insurance write-offs to attack that number. Two people with identical injuries and bills can face very different damages frameworks depending on claim type.How Itemized Damages Findings Affect Memphis Personal Injury DamagesTennessee requires the trier of fact to break your damages apart rather than return one lump sum. Tenn. Code Ann. \u00a7 29-39-103(a) directs findings itemized into past and future damages, with separate categories for medical costs, other economic damages, and noneconomic damages. Medical expenses are itemized as their own category, making reasonable value of services a distinct and heavily litigated component of car accident compensation.Future care is treated differently from past bills. Under Tenn. Code Ann. \u00a7 29-39-103(c), calculation of future medical and health care costs must reflect the period during which the claimant will sustain them, and "all such calculations of future losses shall be adjusted to reflect net present value." For seriously injured crash victims facing years of therapy or surgery, that calculation requires medical and economic proof.\ud83d\udca1 Pro Tip: Ask treating providers for written statements about anticipated future care early. Future medical damages must be supported by competent proof showing the care is reasonably certain to be needed.Practical Steps That Protect Your Medical DamagesThe collateral source rule protects your recovery only if damages are properly documented and preserved. Adjusters often open negotiations using the amount an insurer paid rather than the amount billed, understating claims. A working knowledge of Dedmon and its limits is one reason many injured people consult a Memphis car accident lawyer before responding to settlement offers. Health insurers, Medicare, TennCare, and hospitals may still assert subrogation, reimbursement, or lien rights against settlements, a separate question from how damages are proven.Several habits strengthen claims. Seek prompt evaluation after the collision, follow through with recommended treatment, avoid unexplained gaps in care, and keep written records of every provider contact. Tennessee generally imposes a one-year deadline for filing most personal injury lawsuits under Tenn. Code Ann. \u00a7 28-3-104, and while limited exceptions may apply, they are fact-specific.Frequently Asked Questions1. Does my health insurance payment reduce what the at-fault driver owes?Generally, no. Under Tennessee’s collateral source rule as applied in Dedmon, benefits from sources collateral to the tortfeasor do not reduce the damages award, and evidence of those payments is excluded.2. Can I claim the full billed amount even if my insurer paid less?In ordinary auto accident litigation, plaintiffs may submit full, undiscounted bills as proof of reasonable medical expenses. The defense may rebut reasonableness with other competent evidence, but not by showing the discounted rate an insurer negotiated.3. Does the rule apply to medical malpractice claims too?Not in the same way. Tenn. Code Ann. \u00a7 29-26-119(b) abrogates the common law rule in health care liability actions, which can limit past economic losses to amounts paid or accepted as full payment.4. Does the collateral source rule affect comparative fault?It does not eliminate comparative fault defenses. Tennessee follows modified comparative fault, so an allocation of fault to the injured person reduces recovery proportionally and bars recovery entirely if that person is 50% or more at fault.5. What if my future treatment costs are still unknown?Future medical costs may be recoverable but must be proven with competent evidence and adjusted to net present value. Settling before treating providers can describe likely future care may leave real losses uncompensated.Protecting the Full Value of Your ClaimThe collateral source rule remains one of the more significant protections Tennessee law offers injured drivers and passengers. Because Dedmon v. Steelman confirmed that the collateral source rule survives in ordinary personal injury cases while the legislature carved out health care liability actions by statute, the type of claim you bring may shape how your medical bills are valued.If an insurer is arguing that your recovery should be capped at what your health plan paid, get informed guidance before you respond. Reach Mama Justice by phone at (833) 626-2587 or request a free consultation to talk through your options.Disclaimer: This content is for informational purposes only and is not legal advice. Every case is unique, and results may vary. Consult an attorney about your specific circumstances."},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Blog","item":"https:\/\/www.mamajustice.com\/blog\/#breadcrumbitem"},{"@type":"ListItem","position":2,"name":"What Is the Collateral Source Rule in a Memphis Car Accident Case?","item":"https:\/\/www.mamajustice.com\/blog\/what-is-the-collateral-source-rule-in-a-memphis-car-accident-case\/#breadcrumbitem"}]}]