Anita Gumm v. Easter Seal Society of Iowa, Inc., American Compensation Ins. Co., and SFM Insurance Company ( 2020 )


Menu:
  •                    IN THE SUPREME COURT OF IOWA
    No. 18–1051
    Filed May 1, 2020
    ANITA GUMM,
    Appellant,
    vs.
    EASTER SEAL SOCIETY OF IOWA, INC., AMERICAN COMPENSATION,
    INS. CO., and SFM COMPANIES,
    Appellees.
    On review from the Iowa Court of Appeals.
    Appeal from the Iowa District Court for Polk County, Paul D. Scott,
    Judge.
    An employer seeks further review of a court of appeals decision that
    reversed a district court order upholding the workers’ compensation
    commissioner’s denial of a cumulative injury claim. DECISION OF
    COURT OF APPEALS VACATED; DISTRICT COURT JUDGMENT
    AFFIRMED.
    Joseph S. Powell of Thomas J. Reilly Law Firm, P.C., Des Moines,
    for appellant.
    Lee P. Hook and Tyler S. Smith of Peddicord Wharton, LLP,
    West Des Moines, for appellees Easter Seal Society of Iowa, Inc., and SFM
    Companies.
    2
    Thomas D. Wolle of Simmons Perrine Moyer Bergman PLC,
    Cedar Rapids, for appellee American Compensation Ins. Co.
    3
    MANSFIELD, Justice.
    This case presents the question whether a workers’ compensation
    claimant who receives disability benefits for a traumatic injury can later
    recover disability benefits on a separate cumulative injury claim if the
    cumulative injury is based solely on aggravation of the earlier traumatic
    injury.   Normally a claimant in this situation can ask that the earlier
    traumatic injury claim be reopened. Here the claimant was unable to
    pursue review-reopening because the three-year statute of limitations for
    review-reopening had passed.
    Like the workers’ compensation commissioner and the district court,
    we conclude that a separate cumulative injury claim is not available in
    these circumstances. Such a claim would allow the employee to bypass
    the parameters for review-reopening established by our legislature.       It
    would also be inconsistent with our precedent. See generally Ellingson v.
    Fleetguard, Inc., 
    599 N.W.2d 440
    (Iowa 1999), overruled on other grounds
    by Waldinger Corp. v. Mettler, 
    817 N.W.2d 1
    , 8 (Iowa 2012). Accordingly,
    we vacate the decision of the court of appeals, which ruled to the contrary.
    Instead, we affirm the order of the district court denying the claimant’s
    petition for judicial review.
    I. Facts and Procedural History.
    Anita Gumm began employment as a custodian with Easter Seal
    Society of Iowa in April 2008. 1 At that time, Gumm was fifty-six years old.
    She possessed a ninth-grade education, and her prior work experience
    consisted of laundry work, housekeeping, and janitorial tasks. Gumm’s
    duties at Easter Seals required her to stand on her feet and walk most of
    1We  will refer to the respondent employer and the respondent workers’
    compensation insurance carriers collectively as Easter Seals.
    4
    the day, and her job description required her to be able to “bend, stoop,
    twist, and lift, as well as move a minimum of 80 pounds.”
    While working on October 28, 2008, Gumm slipped on wet grass
    and fractured her right ankle.    She was taken to the emergency room
    where she underwent a procedure and was referred to a podiatrist, Dr. Eric
    Barp, D.P.M.    Gumm remained in Dr. Barp’s care for the rest of the
    timeline in this case. Dr. Barp performed an open reduction and internal
    fixation (ORIF) on Gumm. By December 11, Dr. Barp opined that Gumm
    was doing well and “had radiographically healed.” On January 15, 2009,
    Dr. Barp found Gumm had reached maximum medical improvement
    (MMI), and released her to return to full work activity with no restrictions.
    Dr. Barp later opined Gumm sustained a permanent impairment of
    seventeen percent of her lower extremity as a result of the October 28,
    2008 injury. He also noted she might eventually need to have hardware
    surgically removed from her ankle.
    Easter Seals paid Gumm 37.4 weeks of permanent partial disability
    benefits based on Dr. Barp’s rating.      The last payment occurred on
    May 21, 2010.
    Unfortunately, Gumm continued to suffer right ankle pain for years,
    and had to undergo multiple surgeries and procedures. On April 22, 2010,
    Gumm saw Dr. Barp for pain and stiffness in her right ankle.          X-rays
    showed the fracture had properly healed, but as Dr. Barp had predicted,
    he needed to surgically remove the hardware from Gumm’s ankle.
    Following that surgery, on May 19, Gumm returned to full work activity
    with no restrictions. But at a follow-up appointment on June 22, Gumm
    reported she still had ankle pain that “came and went.”
    Approximately a year and a half later, on January 30, 2012, Gumm
    returned to Dr. Barp with right foot pain. Dr. Barp opined that the pain
    5
    could be a coincidence or the result of Gumm altering her gait because she
    had been compensating for her ankle pain. On March 6, Gumm reported
    pain in her right ankle, foot and toes. The ankle hurt during the workday
    to the point where she sometimes dragged her right foot to avoid bearing
    weight on it. Dr. Barp treated her with an injection. About a month later,
    Gumm reported that the injection had relieved some of her pain, but her
    pain was still so severe at times she could not walk. On April 11, Dr. Barp
    performed an ankle arthroscopy.           Based on the surgery, Dr. Barp
    diagnosed that Gumm suffered from “posttraumatic arthritis of the ankle
    following [her 2008] ORIF and had developed synovitis.”       After a brief
    period of limited work activity, Gumm returned to full work activity on
    May 3 with no restrictions.
    On June 1, Gumm reported continued issues with her ankle.
    Dr. Barp directed Gumm to take anti-inflammatory drugs. One month
    later, Gumm felt no pain and was doing well. Dr. Barp opined Gumm had
    completely healed and “thus warrant[ed] no additional rating of permanent
    impairment.”
    The following year, on May 16, 2013, Gumm disclosed to Dr. Barp
    that she had been suffering from right ankle pain for months. X-rays
    showed she had degenerative joint disease. Dr. Barp treated her with an
    injection. The injection provided limited relief, and a CT scan showed she
    had   posttraumatic    degenerative       manifestations.   Meanwhile,   in
    August 2013, Gumm provided notice to Easter Seals that she intended to
    retire on February 28, 2014, upon reaching sixty-two years old.
    On October 23, 2013, Dr. Barp performed arthroscopic right ankle
    arthrodesis with fluoroscopy fusion surgery. Gumm took FMLA leave and
    eventually returned to work on January 13, 2014. Dr. Barp restricted her
    to four-to-five hours of work per day. Later that month, Gumm saw a
    6
    personal physician, Bradley Meyer, D.O., who stated Gumm’s lower back
    pain had worsened since her return to work on January 13. He believed
    much of the lower back and shoulder pain stemmed from her
    compensating for her right ankle pain. Dr. Meyer treated Gumm, referred
    her to physical therapy, and excused her from work from January 24
    through February 16.
    On February 14, 2014, Gumm disclosed to Dr. Barp that her ankle
    “felt good,” but she had lower back pain and pain in her right knee. Like
    Dr. Meyer, Dr. Barp concluded this pain resulted from gait changes Gumm
    had made in response to her ankle pain and arthrodesis surgery. Dr. Barp
    told Gumm to undergo physical therapy and, for the first time, imposed
    work restrictions, specifically against mopping and lifting anything over
    five pounds.    When Gumm returned to work, Easter Seals could not
    accommodate her restrictions. Consistent with the notice she had given
    Easter Seals the previous August, Gumm retired from Easter Seals on
    February 28.
    In April, Gumm began receiving Social Security Disability benefits
    (SSDI) of $661.00 per month.       In July, she began working as a
    housekeeper for an assisted living center, cleaning resident rooms and
    restrooms.     She was still working there on the date of her workers’
    compensation hearing.     The work was less physically demanding than
    what she had to perform for Easter Seals.
    On February 24, Gumm filed two workers’ compensation petitions.
    In the first petition, she claimed she had sustained an acute injury on
    October 28, 2008, and admitted the injury’s statute of limitations window
    had expired. See Iowa Code § 85.26 (2007). In the second petition, Gumm
    claimed she had sustained a cumulative injury with three potential injury
    dates: March 6, 2012, May 16, 2013, or January 15, 2014. Gumm sought
    7
    compensation for permanent industrial disability benefits, medical
    benefits, and costs.
    The deputy commissioner heard Gumm’s case on March 12, 2015.
    On February 18, 2016, the deputy filed her arbitration decision. She found
    Gumm had sustained sequelae to her October 28, 2008 injury but not a
    distinct and discrete injury thereafter.   As she explained, “Dr. Barp’s
    opinion does not establish claimant suffered disability gradually, reaching
    an injurious condition at some later point. Rather, Dr. Barp’s opinion
    confirms claimant suffered an injury and disability, and through further
    work activities, the disability increased.” The deputy went on,
    [Claimant’s] continued work activities may have played a role
    in aggravating the right ankle condition and resulted in the
    need for further treatment[;] however, by the standard of the
    Ellingson case, [
    599 N.W.2d 440
    ,] this form of aggravation is
    insufficient.   Claimant suffered a significant fracture-
    dislocation and developed the inevitable posttraumatic
    arthritis that would be expected from such an injury. As a
    result of the arthritic condition, claimant required
    arthroscopy, arthrodesis, and more conservative treatment of
    the right ankle. These procedures represent sequelae of the
    original October 28, 2008 injury, not distinct cumulative
    injuries. Claimant also developed bilateral knee and back
    complains as a result of an altered gait follow arthrodesis;
    these complaints also reflect sequelae of the original
    October 28, 2008 injury and are not distinct cumulative
    injuries.
    Accordingly, the deputy commissioner declined to award benefits for the
    asserted cumulative injury with injury dates of March 6, 2012, May 16,
    2013, or January 15, 2014.
    Gumm brought an interagency appeal, and on October 12, 2017,
    the commissioner filed an appeal decision adopting the deputy’s findings
    of fact. The commissioner also affirmed the deputy’s determination that
    Gumm had failed to establish a distinct and discrete cumulative injury.
    8
    Gumm timely sought judicial review.       After receiving briefs and
    hearing argument, the district court entered an order on May 16, 2018,
    that upheld the commissioner’s ruling and dismissed Gumm’s petition.
    Gumm appealed, and we transferred the case to the court of appeals.
    On May 15, 2019, a divided panel of our court of appeals reversed the
    district court and remanded for further proceedings. The court of appeals
    majority reasoned that Floyd v. Quaker Oats, 
    646 N.W.2d 105
    (Iowa 2002),
    creates a carefully circumscribed exception to the Ellingson
    holding. In other words, if a claimant is precluded by the
    statute of limitations from bringing an original proceeding or
    review-reopening, the claimant may recover by way of a
    cumulative-injury claim for any increase in functional
    disability shown to have occurred as the result of day-to-day
    activities in the workplace subsequent to the original injury
    without having to show he or she suffered a ‘distinct and
    discr[ete]’ disability attributable to the post-original-trauma
    work activities.
    One member of the panel dissented.
    We granted Easter Seals’ application for further review.
    II. Standard of Review.
    Generally, we review the workers compensation commissioner’s
    legal interpretations of Iowa Code chapter 85 for errors at law rather than
    giving deference to those interpretations.   Bluml v. Dee Jay’s Inc., 
    920 N.W.2d 82
    , 84 (Iowa 2018); see also JBS Swift & Co. v. Ochoa, 
    888 N.W.2d 887
    , 892–93 (Iowa 2016). To the extent this case centers on the meaning
    of the term “injury,” we recently interpreted a use of that term in
    chapter 85 under an errors-at-law standard. 
    Ochoa, 888 N.W.2d at 892
    –
    93, 896–97.    “[W]e accept the commissioner’s factual findings when
    supported by substantial evidence.” 
    Bluml, 920 N.W.2d at 84
    .
    III. Analysis.
    Gumm received permanent partial disability benefits for her
    October 28, 2008 ankle injury. The last monthly benefit payment occurred
    9
    on May 21, 2010. Unfortunately, her ankle condition worsened as she
    continued work at Easter Seals. And she did not make a claim about the
    worsening condition until February 24, 2014.
    The normal way for a claimant to obtain additional disability benefits
    when her physical condition deteriorates over time and the deterioration
    is attributable to an earlier compensable injury is through a review-
    reopening claim under Iowa Code section 86.14(2).            “The workers’
    compensation statutory scheme contemplates that future developments
    (post-award and post-settlement developments), including the worsening
    of a physical condition or a reduction in earning capacity, should be
    addressed in review-reopening proceedings.” Kohlhaas v. Hog Slat, Inc.,
    
    777 N.W.2d 387
    , 392 (Iowa 2009). As we said in Kohlhaas,
    A compensable review-reopening claim filed by an
    employee requires proof by a preponderance of the evidence
    that the claimant’s current condition is “proximately caused
    by the original injury.” While worsening of the claimant’s
    physical condition is one way to satisfy the review-reopening
    requirement, it is not the only way for a claimant to
    demonstrate his or her current condition warrants an
    increase of compensation under section 86.14(2).
    Id. (quoting Simonson
    v. Snap-On Tools Corp., 
    588 N.W.2d 430
    , 434 (Iowa
    1999)).
    However, a review-reopening claim is subject to a three-year statute
    of limitations from the date of the last benefit payment. See Iowa Code
    § 85.26(2).
    An award for payments or an agreement for settlement
    provided by section 86.13 for benefits under this chapter or
    chapter 85A or 85B, where the amount has not been
    commuted, may be reviewed upon commencement of
    reopening proceedings by the employer or the employee within
    three years from the date of the last payment of weekly
    benefits made under the award or agreement.
    10
    Id. “The plain
    language of the statute requires the three-year period to
    commence from ‘the date of the last payment of weekly benefits made
    under the award or agreement.’ ” Coffey v. Mid Seven Transp. Co., 
    831 N.W.2d 81
    , 90 (Iowa 2013) (quoting Iowa Code § 86.26(2)); see also
    Whitmer v. Int’l Paper Co., 
    314 N.W.2d 411
    , 412 (Iowa 1982). 2
    Sometimes, though, disagreements can arise as to whether the
    claimant has suffered an aggravation of her previous compensable injury
    or a distinct and discrete cumulative injury. That was the crux of our
    decision in Ellingson. See 
    599 N.W.2d 440
    .
    In Ellingson, a forty-pound box fell on the claimant’s head on
    January 4, 1985.
    Id. at 442.
    This resulted in chronic neck, head, and
    arm pain for the claimant.
    Id. At her
    doctor’s orders, the claimant missed
    substantial work time in early 1985 due to neck, head, and arm pain.
    Id. She was
    again taken off work for approximately two months in 1987 due
    to continuing neck and arm pain.
    Id. When she
    returned, she had to work
    partial days for about four months.
    Id. In 1989,
    she was again taken off
    work by doctor’s directions for approximately six months.
    Id. In 1990,
    the claimant underwent an anterior cervical discectomy
    and fusion and was off work for about six months.
    Id. Late in
    1991, she
    was moved to office work after her work activities were restricted based on
    continuing neck and arm pain. She was again taken off work for periods
    of time in early 1992.
    Id. at 442–43.
    In December 1992, the claimant
    underwent another anterior cervical discectomy and fusion.
    Id. at 443.
    Before    the   commission,     the   claimant    alleged   two   separate
    compensable injuries: “(1) the injury incurred from the falling box on
    2Of course, the claimant can still receive reimbursement for needed medical
    treatment that occurs after the three-year time period has passed. See Iowa Code
    § 85.26(2); Ayers v. D & N Fence Co., 
    731 N.W.2d 11
    , 18 (Iowa 2007). All of Gumm’s
    medical bills were paid by Easter Seals in this case.
    11
    January 4, 1985, and (2) a distinct and discreet cumulative neck injury
    from which an episode of disability was manifested on June 17, 1992.”
    Id. We took
    note of the claimant’s reason for claiming two injuries: “Speaking
    with commendable candor, Ellingson freely admits that her cumulative-
    injury claim is designed to produce a new date of injury that will provide
    a higher wage base for computing her compensation.”
    Id. at 444.
    However, the commissioner “found that the only compensable injury
    established by the evidence was the January 4, 1985 injury.”
    Id. at 443.
    We upheld the commissioner’s factual finding that the claimant did
    not have a viable claim for a separate cumulative injury.
    Id. at 444.
    We
    explained,
    It is clear, however, that she may not establish a cumulative-
    injury claim by merely asserting that her disability
    immediately following the January 4, 1985 injury was
    increased by subsequent aggravating work activities. That
    circumstance only serves to increase the disability
    attributable to the January 4, 1985 injury. To show a
    cumulative injury she must demonstrate that she has suffered
    a distinct and discr[ete] disability attributable to post–1985
    work activities rather than as an aggravation of the January 4,
    1985 injury. In presenting that claim to the commissioner,
    she could only prevail if the commissioner, as primary fact
    finder, found that a factual basis for a cumulative-injury
    disability existed. The commissioner did not make that
    finding.
    Id. In short,
    whether a claimant has suffered an aggravation of a previous
    traumatic injury or a distinct and discrete cumulative injury is a fact issue
    to be determined by the commissioner, and that fact determination has
    the “effect of a jury verdict.”
    Id. Ellingson is
    not alone in recognizing the requirement that injuries
    must be distinct and discrete to be separately compensable. As we said in
    Excel Corp. v. Smithart, 
    654 N.W.2d 891
    (Iowa 2002), superseded by
    12
    statute on other grounds, 2004 Iowa Acts 1st Extraordinary Session
    ch. 1001, § 12,
    The separate and discrete requirement prevents a worker from
    transforming a chronic condition into multiple injuries, and
    obtaining the multiple separate recoveries feared by Excel.
    Thus, employers are protected against paying for the prior
    disability over and over by the separate and discrete
    requirement.
    Id. at 898.
    Three years after Ellingson, we decided Floyd. See 
    646 N.W.2d 105
    .
    There the claimant sustained an initial acute injury when he twisted his
    knee on September 3, 1993.
    Id. at 106.
    An orthopedic surgeon concluded
    that the claimant had suffered a meniscus tear that would heal, but by
    May 1994, the claimant was continuing to experience pain and “had a
    greater compromise of the joint space than had previously identified.”
    Id. Toward the
    end of that year, the surgeon established a lifting restriction of
    forty to sixty pounds.
    Id. The surgeon
    opined the following year that
    arthroscopy would not work, but the situation was not bad enough to
    warrant a knee replacement.
    Id. at 106–07.
    The knee “is not a good knee,
    but it may last this way yet for several years.”
    Id. at 107.
    He fixed July 23,
    1996, as the date of maximum medical improvement from the
    September 3, 1993 injury.”
    Id. As in
    Ellingson, the claimant filed two separate petitions, claiming
    both a September 3, 1993 injury and a subsequent cumulative injury.
    Id. The claimant
    then dismissed the petition involving the September 3 injury
    in the face of a statute of limitations defense.
    Id. The commissioner
    nonetheless found a compensable impairment for the cumulative injury.
    Id. On appeal,
    the employer relied on Ellingson to argue that the
    claimant had not “suffered a distinct and discr[ete] disability solely
    13
    attributable to work activities over time, as opposed to an aggravation of a
    preexisting injury from an identified traumatic event.”
    Id. at 108.
    We
    distinguished Ellingson on the following basis:
    In the present case, claimant’s arbitration petition
    seeking benefits for the September 3, 1993 injury was
    voluntarily dismissed in the face of a statute-of-limitations
    defense by the employer.      The industrial commissioner
    concluded that the dismissal of that petition precluded any
    consideration of the September 3, 1993 injury as a
    compensable event. Given this circumstance, we believe that
    claimant should be permitted to recover by way of a
    cumulative-injury claim for any increase in functional
    disability shown to have occurred as the result of day-to-day
    activities in the workplace subsequent to the September 3,
    1993 injury.
    Id. In other
    words, the fact that the original trauma was “precluded . . .
    as a compensable event” meant that the claimant could recover “by way of
    a cumulative-injury claim” for any additional disability resulting from
    continued workplace activity since the date of the original trauma. See
    id. Seemingly, we
    recognized the following exception to Ellingson: where the
    claimant was precluded from recovering payments for the original trauma,
    the claimant would be permitted to recover payments on a cumulative-
    injury basis for subsequent aggravation of the trauma. This is consistent
    with the notion that “[w]e apply the workers’ compensation statute broadly
    and liberally in keeping with its humanitarian objective: the benefit of the
    worker and the worker’s dependents.” Xenia Rural Water Dist. v. Vegors,
    
    786 N.W.2d 250
    , 257 (Iowa 2010).
    Ordinarily, of course, the way to recover benefits for any increase in
    functional disability resulting from aggravation of an original traumatic
    injury due to day-to-day activities in the workplace is by a review-
    reopening claim.    See 
    Kohlhaas, 777 N.W.2d at 392
    .        But where the
    14
    claimant never received benefit payments in the first place, there was never
    a claim that could have been reopened.          It seems fairer to allow the
    claimant to bring a cumulative-injury claim for the increase. Doing so
    doesn’t undermine the “distinct and discrete” injury principle because the
    claimant isn’t trying to turn one injury into two. See 
    Smithart, 654 N.W.2d at 898
    .
    We thus read Floyd as recognizing that a claimant who is suffering
    the mounting, cumulative effects of a workplace trauma does not have to
    prove a distinct and discrete injury when the claimant never received an
    award for that trauma. In that case, the employee is not claim-splitting or
    circumventing the statute of limitations for reopening.       But we think
    Ellingson remains good law otherwise.
    Admittedly, there is language in Floyd that can be read more
    broadly. Floyd discussed with approval Ziegler v. United States Gypsum
    Co. See 
    Floyd, 646 N.W.2d at 108
    –09 (discussing Ziegler, 
    252 Iowa 613
    ,
    
    106 N.W.2d 591
    (1960)). In Floyd we said of Ziegler, “The Ziegler decision
    stands for the proposition that, when a permanent disability has been
    established by an adjudicated award, a later aggravation may provide an
    independent compensable event but only to the extent of the increased
    disability that flows therefrom.”
    Id. at 109.
    But, at the same time, we never suggested in Floyd we were
    overruling Ellingson. Again, in Ellingson we said, “To show a cumulative
    injury [the claimant] must demonstrate that she has suffered a distinct
    and discr[ete] disability attributable to post-[traumatic injury] work
    activities rather than as an aggravation of the [traumatic] 
    injury.” 599 N.W.2d at 444
    .
    Ziegler, moreover, was a special case along the lines of Floyd. In
    Ziegler the claimant suffered a serious back injury on May 16, 1957. 
    252 15 Iowa at 617
    , 106 N.W.2d at 593. A year later, he was still in treatment
    and still in pain.
    Id. at 617–18,
    106 N.W.2d at 593. Nevertheless, he
    returned to work on May 21, 1957, and began loading fifty-pound loads.
    Id. at 618,
    106 N.W.2d at 594. On May 27, he felt “a terrific pain down
    [his] spine, down [his] legs.”
    Id. The claimant
    at that point was diagnosed
    for the first time with a bulged disc in addition to the previously diagnosed
    conditions.
    Id. Under these
    circumstances, the claimant could have filed a review-
    reopening claim. We acknowledged as much in our opinion.
    Id. at 619,
    106 N.W.2d at 594 (“Under the usual case of this kind a simple application
    to revalue the disability resulting from the first injury might be
    made . . . .”). Yet we also noted that the claimant “did not elect this remedy
    for a very obvious reason, i.e., to escape subrogation rights of defendant
    [i.e., the employer], established by recovery in a tort action.”
    Id. The claimant
    had procured a substantial settlement against a third-party
    tortfeasor.
    Id. Because anything
    the claimant recovered in a review-
    reopening would effectively be lost to the claimant through subrogation we
    concluded, “Thus this case must be considered as though defendant was,
    in fact, a new and different employer of the injured claimant, and the injury
    a new injury.”
    Id. at 620,
    106 N.W.2d at 595. Therefore, we applied the
    fiction that the claimant had actually been starting with a new employer
    on May 21.
    Id. (“It is,
    of course, well settled that when an employee is
    hired, the employer takes him subject to any active or dormant health
    impairments incurred prior to this employment.”). It is also important to
    note that there was a new traumatic event in Ziegler, the “terrific pain
    down [his] spine” triggered perhaps by the fact that he was loading fifty
    pounds per trip the week he returned from very significant back surgery.
    Id. at 618,
    106 N.W.2d at 594.
    16
    We therefore believe that the distinction drawn in Ellingson and
    Smithart between cumulative aggravation of an existing compensable
    injury through the daily grind of working and a new, discrete injury
    remains valid in Iowa.      In the former case, review-reopening is the
    recognized remedy if the claimant desires additional disability benefits. A
    claimant cannot avoid legislatively imposed restrictions by reclassifying an
    injury as a new injury unless the facts support that classification. If the
    claimant fails to prove that she could have otherwise avoided her
    cumulative ankle complications and related difficulties as time went on,
    this is not a new compensable injury. See Ayers v. D & N Fence Co., 
    731 N.W.2d 11
    , 16–17 (Iowa 2007).
    Other jurisdictions agree with this rule. In Scott v. Shaw Indus., Inc.,
    
    729 S.E.2d 327
    , 328–29 (Ga. 2012), the Georgia Supreme Court held that
    an employee could not bring a claim for “a fictional new injury, as opposed
    to a change in condition,” to avoid the statute of limitations. Quoting an
    earlier case, the court discussed the following scenario:
    [T]he claimant sustains an injury and is awarded
    compensation during his period of disability. Subsequent
    thereto he returns to his employment performing his normal
    duties or ordinary work. Then as a result of the wear and tear
    of ordinary life and the activity connected with performing his
    normal duties and not because of a specific job-related
    incident his condition gradually worsens to the point that he
    can no longer continue to perform his ordinary work. This
    gradual worsening or deterioration would constitute a change
    in his condition and not a new accident.
    Id. at 329
    (quoting Cent. State Hosp. v. James, 
    248 S.E.2d 678
    , 679 (Ga.
    Ct. App. 1978)). Colorado has held that where an employee files a new
    injury claim within the statute of limitations for reopening an earlier claim,
    the statute of limitations on the reopening claim is tolled if it is later
    determined that the employee’s “current condition is the natural result of
    the [earlier] injury, he has not suffered a new injury and benefits may be
    17
    obtained only by way of a petition to reopen.” Valdez v. United Parcel Serv.,
    
    728 P.2d 340
    , 342 (Colo. App. 1986). But here Gumm did not file a claim
    for a new injury within the review-reopening deadline. In Collins v. Norfolk
    Shipbuilding & Drycock Corp., 
    522 F. Supp. 1211
    (E.D. Va. 1981), the court
    observed,
    In those compensation cases where there is no causal
    relationship between a first compensable injury and a
    subsequent condition, the employee’s proper remedy is an
    original petition or claim based on the new injury. Where,
    however, the subsequent condition represents the
    progression, deterioration or aggravation of an original
    compensable injury, the employee’s proper relief is a petition
    to reopen or modify the original compensation order.
    Accordingly, the limitations period for the aggravation or
    exacerbation of a compensated injury relates back to the date
    of the original injury and not to the date of the aggravation or
    exacerbation.
    Id. at 1214
    (citations omitted); see also 13 Arthur Larson et al., Larson’s
    Workers’ Compensation Law § 131.03[1][b], at 131-21 to -22 (2019)
    (“[W]hen complications develop directly from the original injury, . . . the
    reopening statute applies, and the limitation period cannot be escaped by
    calling the condition a new disability.” (Footnotes omitted.)).
    We also note that the commissioner has regularly adopted the same
    reading of Ellingson and Smithart that we are reaffirming today.
    Specifically, the commissioner has indicated that those decisions stand for
    the following propositions:
    The standard that must be met to establish two
    separate work-related injuries requires a claimant to
    demonstrate a distinct and discrete “disability attributable to
    . . . work activities” that occurs after an initial injury. It is not
    enough for the worker to show disability has been increased
    by subsequent work activities. These circumstances may
    serve to increase the disability attributable to the first injury,
    but do not establish a separate and discrete disability. To
    establish a separate injury claim, the subsequent condition of
    the claimant must not be a consequence of the first injury.
    18
    Boken v. Peak Interests, LLC, Iowa Workers’ Comp. Comm’n Nos. 5040834
    & 5056052, 
    2019 WL 1984043
    , at *12 (Apr. 29, 2019) (quoting 
    Ellingson, 599 N.W.2d at 444
    ). See also generally Dautovic v. Concord Hosp., Iowa
    Workers’ Comp. Comm’n Nos. 5028332 & 5051676, 
    2016 WL 2944583
    (May 17, 2016); Fred Smith v. Midwest Mfg. Co., Iowa Workers’ Comp.
    Comm’n No. 5025093, 
    2009 WL 1171294
    (Apr. 29, 2009); Grove v.
    Interstate Brands Corp., Iowa Workers’ Comp. Comm’n No. 5007230, 
    2004 WL 1713773
    (July 19, 2004). Although we have no obligation to follow the
    commissioner’s reading of our own cases, this convergence gives us reason
    to believe we are not misreading our own caselaw.
    For the foregoing reasons, we hold the commissioner and the district
    court correctly ruled that where a claimant has received disability benefits
    for a prior compensable injury, the claimant is limited to the review-
    reopening remedy for additional disability benefits unless she can prove
    she has suffered another injury. If the subsequent injury is a cumulative
    injury, it must be a distinct and discrete injury, not merely the aggravation
    of the prior injury due to regular work activities.
    We now turn to whether there is substantial evidence to support the
    commissioner’s finding that Gumm did not suffer a distinct and discrete
    injury, but only an aggravation of the earlier October 28, 2008 traumatic
    injury. This court is “bound by the commissioner’s findings of fact so long
    as those findings are supported by substantial evidence.”        IBP, Inc. v.
    Burress, 
    779 N.W.2d 210
    , 213 (Iowa 2010). Evidence is substantial if “the
    quantity and quality of evidence . . . would be deemed sufficient by a
    neutral, detached, and reasonable person, to establish the fact at issue
    when the consequences resulting from the establishment of that fact are
    understood to be serious and of great importance.”               Iowa Code
    § 17A.19(10)(f)(1).
    19
    Here, substantial evidence supports the commissioner’s factual
    findings.   Gumm sustained a significant right ankle fracture and
    dislocation on October 28, 2008, when she slipped and fell on wet grass.
    No new event occurred on the subsequent injury dates she alleged—
    March 6, 2012, May 16, 2013, and January 15, 2014. The first two dates
    were simply dates of consultations with Dr. Barp; the third date was the
    last day she performed her work duties for Easter Seals.
    Dr. Barp testified that Gumm’s pain on March 6, 2012, was an
    expected consequence of her 2008 injury and the subsequent surgery.
    Additionally, Dr. Barp testified that through May 16, 2003, Gumm’s
    treatment was for the injury and condition she sustained on the initial
    2008 fall. Gumm’s development of arthritis was a natural consequence of
    the earlier injury. Dr. Barp agreed that
    the substantial and precipitating cause of Ms. Gumm’s
    ongoing ankle pain complaints was her 2008 slip and fall
    injury. Subsequent surgeries were necessary due to the
    development of arthritis and were necessary in order to
    diminish ongoing symptoms caused by the natural
    progression of the underlying degenerative arthritis.
    Dr. Barp opined that Gumm was going to develop arthritis regardless of
    whether she returned to work; at most, being on her feet at work hastened
    its development.
    There was thus sufficient evidence to sustain the commissioner’s
    finding that Gumm did not suffer a distinct and discrete cumulative injury
    but merely the aggravation over time of her original 2008 injury.
    Considerable record evidence supports the commissioner’s view that
    Gumm’s post-2008 difficulties were entirely sequelae to her original injury.
    20
    IV. Conclusion.
    For the foregoing reasons, we vacate the decision of the court of
    appeals and affirm the judgment of the district court denying Gumm’s
    petition for judicial review.
    DECISION OF COURT OF APPEALS VACATED; DISTRICT COURT
    JUDGMENT AFFIRMED.
    All justices concur except McDermott, J., who takes no part.