Court Opinion

ID: 4637908
Source: CourtListenerOpinion
Date Created: 2020-11-28 18:40:03.981388+00
Date Added: 2024-06-11T08:04:55.731190
License: Public Domain

FILED
                                                                                    Sep 02, 2020
                                                                                    01:52 PM(CT)
                                                                                     TENNESSEE
                                                                                WORKERS' COMPENSATION
                                                                                   APPEALS BOARD

            TENNESSEE BUREAU OF WORKERS’ COMPENSATION
               WORKERS’ COMPENSATION APPEALS BOARD

Angela Varner Nickerson                        )   Docket No.      2019-03-0559
                                               )
v.                                             )   State File No. 54605-2018
                                               )
Knox County Government                         )
                                               )
                                               )
Appeal from the Court of Workers’              )
Compensation Claims                            )
Thomas L. Wyatt, Judge                         )

                                 Reversed and Remanded

This is the second interlocutory appeal of this case. In the first appeal, we vacated the
trial court’s order denying the employer’s motion for summary judgment and remanded
the case for the trial court to consider the threshold issue of subject matter jurisdiction. In
this appeal, the employer asserts the trial court erred in concluding it could exercise
subject matter jurisdiction over the employee’s mental injury claim. It further contends
the trial court erred in concluding there were genuine issues of material fact precluding
summary judgment as to the timeliness of the employee’s petition for benefits. We
conclude the trial court erred in exercising subject matter jurisdiction over this claim, and
we reverse the trial court’s expedited hearing order and remand the case to the trial court
for entry of an order of dismissal.

Presiding Judge Timothy W. Conner delivered the opinion of the Appeals Board in which
Judge David F. Hensley and Judge Pele I. Godkin joined.

Evan E. Hauser, Knoxville, Tennessee, for the employer-appellant, Knox County
Government

Tony Farmer, Knoxville, Tennessee, for the employee-appellee, Angela Varner
Nickerson

                          Factual and Procedural Background

      Angela Varner Nickerson (“Employee”) was employed by Knox County
Government (“Employer”) as a forensics technician for approximately eleven years until
2011, after which she transferred to Employer’s Special Services Department. While

                                              1
working as a forensics technician, Employee viewed certain crime scenes that she alleged
precipitated a mental injury, including scenes involving the death of a child and another
involving abuse and injuries to children. Following these events, which occurred prior to
her transfer to the Special Services Department in 2011, she began experiencing
nightmares and depression that she stated continued “on and off since the incidents.” She
further stated that the nightmares got worse over time. Employee alleges no additional
precipitating or aggravating work-related events occurring after her transfer to the Special
Services Department.

       At some point before March 2015, Employee was told by a primary care
physician, Dr. Robert Thompson, that she “may” have post-traumatic stress disorder
(“PTSD”). In March 2015, she was again told by a medical provider she “may” have
PTSD and there was a “possibility that [her] workplace experiences had contributed to
[her] mental health issues.” In September 2015, she sought treatment from a psychiatrist,
Dr. Kenneth Jobson, and they discussed whether she may suffer from PTSD related to her
employment. Due to health insurance issues, she did not return to Dr. Jobson until April
2018. Employee asserts Dr. Jobson did not diagnose her with PTSD until May 7, 2018.

        In June 2018, Employee submitted a claim for workers’ compensation benefits to
Employer. Almost one year later, on April 29, 2019, she filed a petition for benefits,
alleging that “[a]s a result of specific traumatic experiences as an employee of the Knox
County Sheriff’s Department, I have been diagnosed and treated for PTSD.” She
identified her date of injury as June 12, 2018.

        Employer denied the claim, asserting Employee did not file her claim timely, and
it filed a motion for summary judgment based on the alleged late filing of Employee’s
petition. Employee responded that the statute of limitations was suspended by
application of the discovery rule, arguing that she did not know or have reason to know
her symptoms were causally related to her employment until she was diagnosed with
PTSD in May 2018. Alternatively, she argued her mental injury was a gradual injury to
which the “last day worked rule” applies, resulting in her date of injury being the last day
she worked for Employer, which was less than one year before she filed her petition for
benefits. Employer disputed the application of both rules, asserting Employee knew or
should have known the work-related nature of her alleged mental injury in 2015 when she
sought mental health treatment for problems related to her “workplace experiences.”
Employer additionally argued Tennessee does not recognize a mental injury as a gradual
injury and the last day worked rule is inapplicable to Employee’s claim.

       The trial court denied Employer’s motion for summary judgment, concluding
there were genuine issues of material fact as to when Employee knew or reasonably
should have known of her alleged work-related mental injury. Employer appealed that
decision, and we vacated the trial court’s order and remanded the case for the trial court
to consider whether it could exercise subject matter jurisdiction over the claim. On

                                             2
remand, Employer filed a “Renewed Motion to Dismiss and/or for Summary Judgment,”
and Employee filed a response. After an additional hearing, the trial court again denied
Employer’s motion for summary judgment, concluding the last day worked rule and the
discovery rule “apply to the determination of the date of [Employee’s] injury.” The court
further noted that Employee alleged her mental injury was “cumulative in nature” and did
not become disabling until September 2018, thereby creating disputed issues of material
fact that precluded summary judgment. Employer has appealed.

                                   Standard of Review

       The interpretation and application of statutes and regulations are questions of law
that are reviewed de novo with no presumption of correctness afforded the trial court’s
conclusions. See Mansell v. Bridgestone Firestone N. Am. Tire, LLC, 417 S.W.3d 393,
399 (Tenn. 2013). Likewise, a trial court’s ruling on a motion for summary judgment is
reviewed de novo with no presumption of correctness. Wallis v. Brainerd Baptist
Church, 509 S.W.3d 886, 895 (Tenn. 2016) (“[W]e make a fresh determination of
whether the requirements of Rule 56 of the Tennessee Rules of Civil Procedure have
been satisfied.”). We are also mindful of our obligation to construe the workers’
compensation statutes “fairly, impartially, and in accordance with basic principles of
statutory construction” and in a way that does not favor either the employee or the
employer. Tenn. Code Ann. § 50-6-116 (2019).

                                         Analysis

       The dispositive issue in this appeal is whether the Court of Workers’
Compensation Claims has subject matter jurisdiction over Employee’s claim. The
analysis and resolution of this issue involve statutory interpretation and the application of
rules of statutory construction. In Thompson v. Comcast Corp., No. 2017-05-0639, 2018
TN Wrk. Comp. App. Bd. LEXIS 1, at *24-25 (Tenn. Workers’ Comp. App. Bd. Jan. 30,
2018), we addressed the rules of statutory construction as follows:

       When construing a statute, our goal is to ascertain and give effect to the
       legislative intent without unduly restricting or expanding a statute’s
       coverage beyond its intended scope. We determine legislative intent from
       the natural and ordinary meaning of the statutory language within the
       context of the entire statute without any forced or subtle construction that
       would extend or limit the statute’s meaning. Further, Tennessee Code
       Annotated § 50-6-116 (2017) provides that the workers’ compensation
       statutes “shall not be remedially or liberally construed but shall be
       construed fairly, impartially, and in accordance with basic principles of
       statutory construction[,] and this chapter shall not be construed in a manner
       favoring either the employee or the employer.” In addition, we must
       construe a statute so that no part will be inoperative, superfluous, void, or

                                             3
       insignificant. We are required to give effect to every word, phrase, clause,
       and sentence of the act in order to achieve the Legislature’s intent and we
       must construe a statute so that no section will destroy another.

(Internal quotation marks and citations omitted.)

       In the present case, we must distinguish the “date of injury” as that phrase is used
in Tennessee Code Annotated sections 50-6-101 and -237 from the date on which
Employee’s limitations period began to run. Section 50-6-101 provides that “[t]his
chapter . . . shall be controlling . . . when the date of injury is on or after July 1, 2014.”
(Emphasis added.) Section 50-6-237 provides that “the court of workers’ compensation
claims . . . shall have original and exclusive jurisdiction over all contested
claims . . . when the date of the alleged injury is on or after July 1, 2014.” (Emphasis
added.)

       Before addressing the merits of this appeal, we emphasize that the determination
of the date of injury is a separate and distinct issue from the determination of when an
employee’s statute of limitations begins to run. See, e.g., Ward v. Nissan Motor Mfg.
Co., No. 01S01-9204-CH-00054, 1992 Tenn. LEXIS 712, at *6 (Tenn. Workers’ Comp.
Panel Nov. 30, 1992) (distinguishing between the date of injury and the date of discovery
of an injury). Moreover, the determination of the date of injury is a threshold issue in this
case because it dictates whether the Court of Workers’ Compensation Claims can
exercise subject matter jurisdiction. It is well established that questions regarding a
court’s subject matter jurisdiction address the court’s “lawful authority to adjudicate a
controversy brought before it . . . and, therefore, should be viewed as a threshold
inquiry.” Redwing v. Catholic Bishop for the Diocese of Memphis, 363 S.W.3d 436, 445
(Tenn. 2012). A court derives its subject matter jurisdiction from the Tennessee
Constitution or from statutes, Staats v. McKinnon, 206 S.W.3d 532, 542 (Tenn. Ct. App.
2006), as opposed to conduct or agreement of the parties, Shelby County v. City of
Memphis, 365 S.W.2d 291, 292 (Tenn. 1963). Thus, the parties cannot confer subject
matter jurisdiction on a court by “appearance, plea, consent, silence, or waiver.”
Dishmon v. Shelby State Cmty. Coll., 15 S.W.3d 477, 480 (Tenn. Ct. App. 1999).

                       Definitions of “Injury” and “Mental Injury”

        Tennessee Code Annotated section 50-6-102(14) (2019) defines “injury” and
identifies four types of injuries or conditions that can be compensable under Tennessee’s
Workers’ Compensation Law: (1) injuries by accident; (2) mental injuries; (3)
occupational diseases; and (4) cumulative trauma conditions. The statute clarifies when
an injury is considered “accidental,” see Tennessee Code Annotated section 50-6-
102(14)(A), but, of the four types of injuries or conditions identified above, only “mental
injury” is separately defined:

                                              4
        “Mental injury” means a loss of mental faculties or a mental or behavioral
        disorder, arising primarily out of a compensable physical injury or an
        identifiable work related event resulting in a sudden or unusual stimulus,
        and shall not include a psychological or psychiatric response due to the loss
        of employment or employment opportunities.

Tenn. Code Ann. § 50-6-102(17). 1 Hence, since at least 2002, the legislature has
recognized two types of mental injuries: those arising primarily out of a compensable
physical injury and those arising primarily out of an identifiable work-related event
resulting in a sudden or unusual stimulus. Employee’s claim in the instant case involves
the latter of those two categories of mental injuries.

       Neither the statutory provisions defining “injury” nor the provisions defining
“mental injury” articulates a method for identifying the date a mental injury occurs.
Thus, in interpreting the statutory language in the context of the issues raised in this
appeal, we must consider how to identify the date of injury in a mental injury claim for
purposes of conferring subject matter jurisdiction, an issue not heretofore addressed by us
or the Tennessee Supreme Court. In doing so, we must also consider precedent
addressing date-of-injury issues in other kinds of cases, including cases involving injuries
by accident, cumulative trauma conditions, and occupational diseases, and determine
whether those cases are controlling or persuasive in the context of determining the date of
a mental injury.

                                        Injuries by Accident

        Tennessee’s Workers’ Compensation Law does not define the phrase “date of
injury.” However, in the context of an injury by accident, section 50-6-102(14)(A)
provides that the injury must be “caused by a specific incident, or set of
incidents, . . . identifiable by time and place of occurrence.” In cases in which an
employee experiences an “injury by accident,” the accident and the injury typically occur
contemporaneously or close in time. See, e.g., Joiner v. UPS, No. M2018-01876-SC-R3-
WC, 2019 Tenn. LEXIS 522 (Tenn. Workers’ Comp. Panel Dec. 6, 2019) (The
employee’s “date of injury” was the date he felt pain and tingling in his cervical spine
after lifting a mailbag at work.); Johnson v. Stanley Convergent Sec. Sys., No. 2016-08-
0656, 2017 TN Wrk. Comp. App. Bd. LEXIS 44, at *9 (Tenn. Workers’ Comp. App. Bd.
Aug. 3, 2017) (“An employee who suffers an acute work injury . . . cannot toll the statute
of limitations by claiming he or she was unaware of the full extent of the resulting

1
   Prior to July 1, 2014, the Workers’ Compensation Law contained a separate section defining
“occupational diseases,” see Tennessee Code Annotated section 50-6-301 (2013), but that section was
deleted in its entirety by the 2013 Workers’ Compensation Reform Act. “Mental injury” was first
statutorily defined in 2002. See Tenn. Code Ann. § 50-6-102 (2002) (A mental injury is “a loss of mental
faculties or a mental and/or behavioral disorder where the proximate cause is a compensable physical
injury . . . or an identifiable work-related event resulting in a sudden or unusual mental stimulus.”).
                                                   5
injury.”); Zurich-American Ins. Co. v. Kent, No. M1998-00886-SC-WCM-CV, 2000
Tenn. LEXIS 313, at *7-8 (Tenn. Workers’ Comp. Panel June 13, 2000) (“The
underlying practical reason for insisting on a definite date of the accident is that a number
of important questions cannot be answered unless a date is fixed.”).

        In Arnold v. Courtyard Management Corp., No. W2015-02266-SC-WCM-WC,
2016 Tenn. LEXIS 648 (Tenn. Workers’ Comp. Panel Sept. 28, 2016), the employee
alleged she injured her neck on August 18, 2012, while scraping and caulking a tub. Id.
at *2. The employer paid some workers’ compensation benefits but last paid a medical
bill on April 29, 2013. Id. at *6. Thereafter, the employee filed a claim for benefits on
May 7, 2014. Id. at *4. In response to the employer’s motion for summary judgment
asserting the employee’s claim was not timely, the employee argued she had not reached
maximum medical improvement, and thus did not know the full extent of her injury, until
less than one year prior to the filing of her claim. Id. at *6. In reversing the trial court’s
denial of the employer’s motion for summary judgment, the Supreme Court’s Special
Workers’ Compensation Appeals Panel rejected an application of the discovery rule in
circumstances where an employee has suffered an acute injury at work. Id. at *9. The
Panel explained that earlier decisions applying the discovery rule were “not relevant to
the case before us.” Id. See also Mumpower v. City of Erwin, No. E2000-00698-WC-
R3-CV, 2001 Tenn. LEXIS 14, at *3 (Tenn. Workers’ Comp. Panel Jan. 4, 2001) (The
fact that six years after the work injury the employee received information indicating the
injury was “worse than originally believed” did not serve to extend the operation of the
statute of limitations.).

        In Smiley v. Four Seasons Coach Leasing, Inc., Nos. 2016-06-0104 & -0105, 2016
TN Wrk. Comp. App. Bd. LEXIS 28 (Tenn. Workers’ Comp. App. Bd. July 15, 2016),
the employee, a coach driver, alleged he suffered a back injury over the course of
nineteen days while operating a tour bus. Id. at *6. In response to the employer’s
argument that the employee had failed to identify an acute “injury by accident,”
identifiable by time and place of occurrence, we responded, “to establish a compensable
injury by accident, an employee need not prove a single, sudden event accompanied by
the immediate onset of pain or other symptoms, but can meet his or her burden . . . by
presenting evidence [of] . . . a compensable set of incidents over an identifiable period of
time.” Id. at *22.

       Recently, in Coates v. Tyson Foods, Inc., No. W2019-00904-SC-R3-WC, 2020
Tenn. LEXIS 281 (Tenn. Workers’ Comp. Panel July 28, 2020), the Appeals Panel
addressed a case in which the employee alleged injuries to both elbows while using a
sledgehammer at work in June 2013. Id. at *3. In November 2014, more than one year
after he first reported his condition to a supervisor, he filled out an injury report. Id.
Thereafter, he was referred to an orthopedic surgeon who recommended surgery. Id.
After being unable to resolve his claim through the benefit review conference process, he

                                              6
filed a complaint in the Chancery Court of Obion County pursuant to pre-2013 Reform
Act law. Id. at *2.

       Although the crux of the case hinged on a statute of limitations issue, the Appeals
Panel noted distinctions between pre-2013 Reform Act cases and post-reform cases.
Specifically, the Panel noted that the employee first complained of symptoms in June
2013, which was prior to the effective date of the 2013 Reform Act, but completed an
accident report in November 2014 and filed a request for a benefit review conference in
June 2015, both of which occurred after the 2013 Reform Act became effective.
Nevertheless, the Appeals Panel noted that “for this injury occurring prior to July 1,
2014, the workers’ compensation law is remedial in nature and must be given a liberal
and equitable construction in favor of the employee.” Id. at *13 (quoting Cantrell v.
Carrier Corp., 193 S.W.3d 467, 472 (Tenn. 2006)) (emphasis added). Thus, regardless
of the date on which the employee subjectively “discovered” he had a claim, the court
relied on the date of the accident precipitating his condition to identify the date of injury.
In sum, in those cases where the employee alleges an “injury by accident,” the date of
injury has consistently been identified as the date of the work incident precipitating the
injury regardless of when the employee became aware of the injury.

                                    Cumulative Trauma Injuries

        Over the last several decades, courts have struggled to identify the date of injury in
cases where there is no sudden accident resulting in the contemporaneous manifestation
of an injury. For example, in Building Materials Corp. v. Britt, 211 S.W.3d 706 (Tenn.
2007), the employee claimed he suffered a gradual injury to his low back. In analyzing
the date-of-injury issue, the Tennessee Supreme Court explained, “[i]n the case of a
gradually occurring injury, the last-day-worked rule is used to help identify a date on
which the injury occurred.” Id. at 711. The Court considered cases from other
jurisdictions and concluded that “the date of injury for a gradually occurring injury is the
last day worked.” Id. at 712 (citing Lawson v. Lear Seating Corp., 944 S.W.2d 340, 341-
42 (Tenn. 1997)). 2

       However, in Hix v. TRW, Inc., M2007-02822-WC-R3-WC, 2009 Tenn. LEXIS
285 (Tenn. Workers’ Comp. Panel June 12, 2009), a hearing loss case, the Appeals Panel
considered whether the “last day worked” rule dictated the identification of the date of
injury in every gradual injury case. Specifically, the Panel explained the issue as follows:

2
  In Britt, the Tennessee Supreme Court overruled in part its earlier decision in Bone v. Saturn Corp., 148
S.W.3d 69 (Tenn. 2004), where the Court had applied an alternative rule for determining the date of
injury in gradual injury cases. Britt, 211 S.W.3d at 708-09. In so holding, the Court noted that “[t]he
last-day-worked rule is consistent with the requirement that we liberally construe the Workers’
Compensation Law in order to secure benefits for injured workers.” Id. at 713.
                                                    7
       [T]he question before this panel is whether the “last day worked” rule
       should be applied where the evidence clearly establishes a date prior to the
       last day worked where injurious exposure ceased, the testimony clearly
       establishes that no further deterioration of the employee’s condition
       occurred as a result of a workplace injury after the last day of injurious
       exposure, and the employee ceased working for the employer for reasons
       unrelated to the workplace injury.

Id. at *17-18. The Appeals Panel concluded that the date of injury is “the last day the
employee was exposed to the work activity that caused the injury,” which may not be the
last day worked. Id. at *19 (quoting Barnett v. Earthworks Unlimited, Inc., 197 S.W.3d
716, 721-22 (Tenn. 2006)). 3 See also Buckingham v. Fid. & Guar. Ins. Co., No. M2006-
01587-WC-R3-WC, 2007 Tenn. LEXIS 910, at *13 (Tenn. Workers’ Comp. Panel Oct.
25, 2007) (In a carpal tunnel syndrome case, the Appeals Panel noted that the Supreme
Court had “squarely declined to adopt . . . the date the injury manifests itself as the date
of injury,” looking instead to the date the employee last engaged in the work activity
causing the injury.)     Thus, in cumulative trauma cases, in which the employee’s
condition is considered a “new injury each day at work,” see Barnett, 197 S.W.3d at 721,
a court may determine the date of injury by considering the last day worked or the date
the employee was last exposed to the work activity that caused the injury.

                                          Mental Injuries

       Next, we must consider whether there is any precedent recognizing a gradually
occurring mental injury in this state. In Goodloe v. State, 36 S.W.3d 62 (Tenn. 2001), the
employee alleged she purposely took an overdose of anxiety medication after being told
she was likely to lose her job. Id. at 64. She also asserted that she suffered from severe
depression caused by work-related stress. Id. at 67. In affirming the finding of the
Claims Commission rejecting the employee’s claim for a mental injury, the Supreme
Court explained as follows:

       Before concluding, we address the employee’s assertion that some
       jurisdictions have adopted the rule that mental injuries caused by gradual or
       cumulative work-related stress are compensable and that we should as
       well. . . . [T]he settled rule in this state is that injuries are generally
       compensable as accidental injuries when they are precipitated by physical
       exertion or strain or a specific incident or series of incidents involving
       mental or emotional stress of an unusual or abnormal nature. Moreover,
       this Court has previously considered and rejected a pure gradual stress
3
 Following the Appeals Panel’s release of its opinion in Hix, the employer filed a motion for the full
Tennessee Supreme Court to review the Panel’s opinion. The Supreme Court denied the motion and
adopted the Appeals Panel’s opinion as its own. Hix v. TRW, Inc., No. M2007-02822-SC-WCM-WC,
2009 Tenn. LEXIS 290 (Tenn. June 12, 2009).
                                                  8
       approach due to a concern over experiencing a dramatic increase in mental
       stress claims like that seen in other jurisdictions that have adopted the
       theory. The concern previously expressed by this Court over eliminating
       the requirement that the stressful, work-related event be something beyond
       the usual stress encountered in the work place remains today. Accordingly,
       we decline the opportunity to change established law by recognizing the
       compensability of mental injuries caused by gradual or cumulative work-
       related stress which is not abnormal or unusual in nature.

Id. (emphasis added) (internal quotation marks and citations omitted). Hence, prior to
2002, when the legislature defined “mental injury,” the Supreme Court treated mental
injury claims as “accidental injuries” and rejected those caused by gradual or cumulative
work-related stress. 4

        In Pressley v. State, No. E2003-01133-WC-R3-CV, 2004 Tenn. LEXIS 27 (Tenn.
Workers’ Comp. Panel Jan. 14, 2004), cited by Employee in support of her position, the
plaintiff, a state trooper, asserted she suffered from a mental injury caused by three
specific events that occurred over a two-year period. Id. at *2. Following these three
events, the employee was diagnosed with severe depression and rendered unable to work.
Id. at *3-4. At the trial level, her claim for workers’ compensation benefits was denied
because the Claims Commissioner determined her condition was caused by workplace
stress like that of others in the same or a similar position. Id. at *7. On appeal, the
Appeals Panel reversed, noting that the “several specific events” alleged by the employee
were “unusual and extraordinary.” Id. at *13. The Panel did not, however, conclude the
employee was suffering from a gradual mental injury, but instead stated that these events
“produced a mental stimulus of shock and unexpected anxiety.” Id.

       Although the issue in Pressley did not hinge on identifying the date of injury,
certain of the Panel’s findings are relevant to our analysis in the present case. In rejecting
the argument that the employee’s mental condition arose gradually from typical work
stress and was not caused by any “sudden, acute, or unexpected mental stimulus,” the
Appeals Panel concluded that “all of the evidence in this action confines the origin of the
employee’s present mental condition to follow the specific events in question.” Id. at
*11-12. The Panel then explained, “the mere fact the employee relies on several unique
and specific events does not make the claim a gradual non-compensable injury.” Id. at
*12. Thus, while separate, identifiable work-related events resulting in a sudden or
unusual stimulus can form the basis of a mental injury claim, a “gradual” or cumulative
mental injury claim has not been recognized as viable under Tennessee’s Workers’
Compensation Law.
4
  Goodloe was decided before the General Assembly added a definition of “mental injury” to the
Workers’ Compensation Law in 2002. This amendment codified the holding of Goodloe to the extent the
definition required proof of a “sudden or unusual stimulus,” and not merely cumulative work-related
stress, in cases where there is no compensable physical injury. Tenn. Code Ann. § 50-6-102(15) (2002).
                                                  9
        In the present case, it is important to distinguish between a gradual injury, which
has been described by Tennessee courts as a “new injury each day at work,” see Barnett,
197 S.W.3d at 721, and the gradual worsening of symptoms caused by a sudden or
unusual mental stimulus. The former involves repeated exposure to injurious conditions
or circumstances over some period of time, resulting in a new injury every day of the
exposure, while the latter involves a single incident or set of incidents causing a mental
injury, the symptoms of which may worsen over time. In consideration of the gradual
injury cases discussed above, we conclude the rationale for applying a pre-2013 Reform
Act doctrine specific to gradual injury claims, i.e. the “last day worked rule,” to mental
injury claims is not supported by Tennessee case law or the 2013 Reform Act. Instead,
the applicable statutory definition provides that a mental injury is one “arising primarily
out of a compensable physical injury or an identifiable work related event [or events]
resulting in a sudden or unusual stimulus.” Tenn. Code Ann. § 50-6-102(17).

                              Occupational Disease Claims

       As noted above, with the adoption of the 2013 Workers’ Compensation Reform
Act, the legislature removed section 50-6-301, which defined the term “occupational
diseases.” However, other sections of the statute governing occupational disease claims
remain. Notably, section 50-6-303 provides that “the partial or total incapacity for work
or the death of an employee resulting from an occupational disease . . . shall be treated as
the happening of an injury by accident or death by accident.” Tenn. Code Ann. § 50-6-
303(a)(1) (2019). Thus, the general assembly has provided specific guidance regarding
how to identify the date of injury in occupational disease claims. In non-death cases, it is
the date of the partial or total incapacity for work due to an occupational disease. Id.

       The Supreme Court’s Special Workers’ Compensation Panel addressed the date-
of-injury issue in an occupational disease claim in Lively ex rel. Lively v. Union Carbide
Corp., No. E2012-02136-WC-R3-WC, 2013 Tenn. LEXIS 642 (Tenn. Workers’ Comp.
Panel Aug. 13, 2013). There, the deceased employee’s dependent pursued death benefits
as a claim separate and apart from her deceased spouse’s prior settlement for the same
occupational disease. Id. at *1-2. The Court addressed the date-of-injury issue as
follows:

       Parenthetically, the parties appear to have operated, at least briefly, under
       the erroneous assumption that the date of injury in an occupational disease
       case should be the date that the employee is diagnosed with the disease. As
       stated, the primary statute governing occupational disease cases provides
       that the “happening of an injury” occurs either by the partial or total
       incapacity for work or death; there is no mention of the date of diagnosis as
       an option for determining the date of injury. In contrast, the statute of
       limitations for filing a claim based on an occupational disease is not
       triggered without “[f]irst, an incapacity for work; [and s]econd, either

                                            10
       actual or constructive knowledge an occupational disease is the cause of the
       incapacity for work.” In consequence, while the date of diagnosis in an
       occupational disease is relevant insofar as the statute of limitations is
       concerned, it has no effect on the date of injury, which is determined by
       either incapacity for work or the event of death.

Id. at *26-28 (emphasis added) (citation omitted); see also Shuler v. Eastman Chem. Co.,
E2016-02292-SC-R3-WC, 2017 Tenn. LEXIS 721 (Tenn. Workers’ Comp. Panel Nov.
17, 2017) (Where the employee’s last injurious exposure to workplace chemicals
occurred in 1999, but he became disabled from working in 2015, section 50-6-303
defined the date of injury as occurring in 2015 and deprived the circuit court of
jurisdiction.).

        Thus, in the context of occupational disease cases, the Appeals Panel has made
clear that the analysis for determining the date a statute of limitations is triggered is not
the same as the analysis for determining the date of injury. We find no reason to depart
from this rationale. While the date Employee subjectively believed she suffered from a
work-related mental disorder, or the date she was diagnosed with such a mental disorder,
may be relevant for purposes of applying the discovery rule in addressing the statute of
limitations, it does not control the determination of the date of injury.

                          Date of Injury in Mental Injury Claims

        Having carefully considered the law relevant to determining the date of injury in
various cases, as well as the briefs and arguments of counsel, we find no basis in the plain
language of the statute or the case law discussing mental injuries to conclude a mental
injury claim can be treated as a gradual or cumulative injury, as was suggested by the
trial court. Therefore, we conclude the “last day worked rule” is not the appropriate
principle to apply to identify the date of injury in a mental injury claim. Moreover, we
find no basis in the statutes to treat the date of injury in mental injury claims in the same
manner as the date of injury in occupational disease cases given that the Workers’
Compensation Law contains a provision explaining how to identify the date of injury in
occupational disease cases, but contains no similar language with respect to mental injury
claims.

        Thus, in light of our determinations above, we conclude it is not germane to the
issue of subject matter jurisdiction that the trial court considered whether Employee’s
mental injury was “cumulative.” Moreover, we do not find the trial court’s discussion of
the discovery rule, and its conclusion that the evidence “creates genuine issues on facts
material to its application of the discovery rule in the assessment of subject matter
jurisdiction” as being determinative in identifying the date of Employee’s alleged mental
injury.

                                             11
       Employee urges us to conclude the “subjective manifestation date of Employee’s
‘loss of mental faculties or mental or behavioral disorder,’ rather than the work-related
events precipitating the stimuli, controls for purposes of establishing subject matter
jurisdiction.” In essence, Employee argues that an employee suffers a mental injury
when the employee knows he or she has suffered a mental injury, and that it is this
subjective conclusion that determines the date of the injury for jurisdictional purposes.
However, Employee does not cite, and we cannot locate, any case supporting such a
proposition. We are unpersuaded by Employee’s argument. 5

       Instead, we return to the language of sections 50-6-102(14) and 50-6-102(17),
which provide the only statutory guidance for defining a mental injury and identifying the
date of injury in such cases. A mental injury occurs when there is “a loss of mental
faculties or a mental or behavioral disorder, arising primarily out of a physical injury or
an identifiable work related event resulting in a sudden or unusual stimulus.” Tenn. Code
Ann. § 50-6-102(17). In the present case, there was no physical injury alleged; thus, to
determine the date of Employee’s alleged mental injury, we must look to the date of the
“identifiable work related event [or events] resulting in a sudden or unusual stimulus.” In
this case, it is undisputed that the events that form the basis of Employee’s alleged mental
injury claim occurred in or before 2011, well in advance of the effective date of the 2013
Reform Act that created the Court of Workers’ Compensation Claims. As provided in
section 50-6-237, the Court of Workers’ Compensation Claims “shall have original and
exclusive jurisdiction over all contested claims . . . when the date of the alleged injury is
on or after July 1, 2014.” Tenn. Code Ann. § 50-6-237. Based on the undisputed facts in
the present case, we conclude the “date of injury,” as that term is used in Tennessee Code
Annotated sections 50-6-101 and 50-6-237, occurred in or before 2011, thereby depriving
the Court of Workers’ Compensation Claims of subject matter jurisdiction. 6

                                             Conclusion

       For the foregoing reasons, we reverse the determination of the trial court and
remand this case for entry of an order of dismissal based on the trial court’s lack of
subject matter jurisdiction. Costs on appeal are taxed to Employee.

5
  Although the date Employee was objectively diagnosed with a mental injury causally related to work
may well impact the date Employee discovered her injury for purposes of the tolling of the statute of
limitations, the discovery date does not dictate the date of injury for jurisdictional purposes.
6
  Our determination that the Court of Workers’ Compensation Claims cannot exercise subject matter
jurisdiction over Employee’s claim renders it unnecessary for us to address whether the claim was timely
filed.
                                                  12
                 TENNESSEE BUREAU OF WORKERS’ COMPENSATION
                   WORKERS’ COMPENSATION APPEALS BOARD

Angela Varner Nickerson                               )      Docket No. 2019-03-0559
                                                      )
v.                                                    )      State File No. 54605-2018
                                                      )
Knox County Government                                )
                                                      )
                                                      )
Appeal from the Court of Workers’                     )
Compensation Claims                                   )
Thomas L. Wyatt, Judge                                )

                                   CERTIFICATE OF SERVICE

I hereby certify that a true and correct copy of the Appeals Board’s decision in the referenced
case was sent to the following recipients by the following methods of service on this the 2nd day
of September, 2020.

 Name                              Certified   First Class   Via   Via     Sent to:
                                   Mail        Mail          Fax   Email
 Evan E. Hauser                                                      X     evan.hauser@knoxcounty.org
 Natalie Moore                                                             natalie.moore@knoxcounty.org
 Tony Farmer                                                         X     tony@farmerdreiser.com
 Barbara Gibson                                                            bgibson@farmerdreiser.com
 Thomas L. Wyatt, Judge                                              X     Via Electronic Mail
 Kenneth M. Switzer, Chief Judge                                     X     Via Electronic Mail
 Penny Shrum, Clerk, Court of                                        X     penny.patterson-shrum@tn.gov
 Workers’ Compensation Claims

Olivia Yearwood
Clerk, Workers’ Compensation Appeals Board
220 French Landing Dr., Ste. 1-B
Nashville, TN 37243
Telephone: 615-253-1606
Electronic Mail: WCAppeals.Clerk@tn.gov