Expert Witnesses in Tennessee
Under Tennessee Rule of Evidence 702, a witness may offer expert testimony if the witness is “qualified by knowledge, skill, experience, training, or education” and if the proposed testimony will “substantially assist the trier of fact” in understanding the evidence or determining a fact in issue. Tennessee courts apply a flexible qualification standard—formal degrees or professional licensure are not strictly required—so long as the witness possesses specialized expertise beyond that of a layperson.
Rules Governing Disclosure
Tennessee Rule of Civil Procedure 26.02(4) governs disclosure of expert witnesses and permits a party to obtain, through interrogatories, identification of each expert whom the opposing party expects to call at trial, along with the subject matter of the testimony, the substance of the facts and opinions to be offered, and a summary of the grounds for those opinions. Upon request, the responding party must also disclose the expert’s qualifications, including publications from the past ten years, a list of cases in which the expert has testified within the previous four years, and the compensation to be paid for the expert’s work. The rule further authorizes depositions of disclosed experts and allows discovery of underlying materials and data reasonably relied on in forming the opinions. Unlike the federal rules, Tennessee does not require automatic expert reports; disclosure obligations arise only upon proper discovery requests, and parties remain subject to supplementation duties under Rule 26.05 and sanction authority under Rule 37 for incomplete or untimely disclosures.
Tennessee Code Annotated § 29-26-115 imposes significantly stricter requirements on expert witnesses in health care liability (medical malpractice) actions than those found under the Tennessee Rules of Evidence and Rule 26. To testify on the standard of care, breach, or causation, the expert must be licensed to practice in Tennessee or a contiguous state—Alabama, Mississippi, Arkansas, Missouri, Kentucky, Virginia, North Carolina, or Georgia—and must have practiced in the relevant profession or specialty within one year preceding the alleged injury. Additionally, the expert must demonstrate familiarity with the standard of professional care applicable to the defendant’s community or a similar community. These statutory prerequisites operate as qualification filters beyond Rule 702’s general expert standard and may bar testimony from otherwise qualified experts who do not satisfy the geographic, recency, and locality requirements.
Admissibility Standards
Tennessee applies a reliability-focused standard for the admissibility of expert testimony grounded in Tennessee Rule of Evidence 702 and the Tennessee Supreme Court’s decision in McDaniel v. CSX Transportation, Inc., 955 S.W.2d 257 (Tenn. 1997). Under Rule 702, expert evidence is admissible only if the witness is qualified by knowledge, skill, experience, training, or education and the testimony will substantially assist the trier of fact. McDaniel—later refined by cases such as Brown v. Crown Equipment Corp. and Dedmon v. Steelman—directs trial courts to act as gatekeepers and assess whether the reasoning or methodology underlying the opinion is reliable and relevant. Factors informing this analysis include whether the expert’s theory or technique can be and has been tested, whether it has been published or peer-reviewed, its known or potential error rate, the existence and maintenance of controlling standards, and general acceptance in the relevant scientific community.
Attorney–Expert Communication Protection
Tennessee does not provide the same broad protection for attorney–expert communications that exists in federal court after the 2010 amendments to Fed. R. Civ. P. 26. Because Tennessee has not adopted those amendments, communications between counsel and a testifying expert are generally discoverable, subject to the normal limits of privilege and work product. Courts in Tennessee routinely allow opposing parties to obtain expert notes, drafts, emails, and attorney instructions if the expert intends to testify, reasoning that anything shaping the expert’s opinion bears on credibility and is “fair game.”
While the work-product doctrine still applies, it is interpreted more narrowly in this context; true opinion work product—counsel’s mental impressions or litigation strategy—may be protected if clearly segregated, but factual material given to the expert, draft reports, and communications ordinarily must be produced.
Compensation
Under Tenn. R. Civ. P. 26.02(4)(C), when a party seeks to depose the opposing party’s testifying expert, the discovering party must pay the expert a reasonable fee for the time spent responding to discovery, including preparation and deposition time. Aside from this requirement, Tennessee law does not set fixed rates, cap expert charges, or supply a fee schedule, and compensation arrangements are generally left to negotiation between counsel and the expert. Courts may intervene if a fee demand is challenged as unreasonable, but otherwise Tennessee places few formal constraints on expert compensation, and fee disclosure arises only when requested through Rule 26 discovery.
Limits on Number of Expert Witnesses
Tennessee does not impose a formal, numerical limit on the number of expert witnesses a party may call in a civil case. Neither the Tennessee Rules of Civil Procedure nor the Tennessee Rules of Evidence set a hard cap on expert witnesses, and parties are generally free to offer whatever expert testimony is necessary to meet their burden of proof or rebut an opposing party’s case.
Out-of-State Expert Qualification
Out-of-state experts may testify in Tennessee courts, but the permissibility depends on the type of case. In most civil matters, Tennessee applies the general qualification standard under Tennessee Rule of Evidence 702, which allows experts qualified by knowledge, skill, experience, training, or education regardless of residency or licensing status; thus, out-of-state experts are routinely accepted. However, in health care liability (medical malpractice) actions, Tenn. Code Ann. § 29-26-115 imposes specific restrictions: experts testifying on the standard of care, breach, or causation must be licensed to practice in Tennessee or in one of the eight contiguous states—Alabama, Mississippi, Arkansas, Missouri, Kentucky, Virginia, North Carolina, or Georgia—and must have practiced in the relevant specialty within the year preceding the alleged injury. As a result, while out-of-state experts are allowed generally, medical malpractice cases are subject to these statutory geographic and temporal requirements, which may bar experts who do not satisfy them.
Rebuttal Experts
Tennessee recognizes rebuttal experts, and parties may offer expert testimony for the purpose of responding to, contradicting, or explaining opinions introduced by an opposing expert. Neither the Tennessee Rules of Civil Procedure nor the Rules of Evidence prohibit rebuttal experts, and Tennessee courts routinely admit them so long as the testimony is relevant and properly disclosed. A rebuttal expert must still satisfy the qualification requirements of Tennessee Rule of Evidence 702, and in medical malpractice cases must also meet the statutory criteria of Tenn. Code Ann. § 29-26-115.
State-Specific Statutes & Local Rules
Rule 702 of Tennessee Rules of Evidence: Establishes the admissibility criteria for expert testimony
Tenn. Code Ann. § 29-26-115: Imposes additional qualification requirements on expert witnesses in medical malpractice cases—restricting who may testify on standard of care, breach, and causation beyond the general Rule 702 standard.
Rule 26.02 of Tennessee Rules of Civil Procedure: Lays out expert disclosure requirements
