delivered the opinion of the Court, in which
PHILLIPS, Chief Justice, GONZALEZ, HECHT, ENOCH, OWEN, BAKER and HANKINSON, Justices, join.The issue in this case is whether a workers’ compensation claimant who failed to appeal his original impairment rating can reopen the issue months later by arguing, under Texas Labor Code section 410.307, that a “substantial change of condition” has occurred. The trial court granted summary judgment for the workers’ compensation insurance carrier, concluding that the issue could not be reopened. The court of appeals reversed. Manasco v. Lumbermens Mutual Cas. Co., 951 S.W.2d 286 (Tex. App. — Beaumont 1997) We hold that a claimant may not use section 410.307 to reopen his impairment rating after his time for appeal has lapsed. We therefore reverse the court of appeals’ judgment and render judgment that Manasco take nothing.
I
In 1989, the Legislature enacted the Texas Workers’ Compensation Act to restructure the workers’ compensation system. See Texas Workers’ Compensation Comm’n v. Garcia, 893 S.W.2d 504, 510 (Tex.1995). The 1989 Act mandates a three-stage hearing process to resolve disputed claims: 1) a benefit review conference; 2) a contested case hearing; and 3) an administrative appeal. The benefit review conference is a nonadver-sarial, informal proceeding aimed at resolving disputed issues by mutual agreement. Tex. Lab.Code § 410.021. The presiding benefit review officer informs the parties of their rights, mediates the dispute, and may ask the parties questions. Id. § 410.026(a), (c). The officer does not make a formal record, but prepares a written report detailing each issue not settled at the conference. Id. §§ 410.026(d), 410.031(a). The officer then makes a recommendation on the disputed issues and on the payment or denial of benefits. Id. § 410.031(b)(4), (5).
If disputed issues remain after the benefit review conference, the parties may elect to arbitrate or proceed to a contested ease hearing. Tex. Lab.Code §§ 410.104, 410.151. The contested case hearing is a formal evi-dentiary proceeding with sworn testimony and prehearing discovery procedures. Id. §§ 410.151-169. The hearing officer decides the disputed issues and issues a written decision, setting forth factual and legal findings and awarding benefits if they are due. Id. § 410.168(a). The hearing officer’s decision is final absent an appeal. Id. § 410.169.
Any party may appeal the hearing officer’s decision to a panel of the Texas Workers’ Compensation Commission. Tex. Lab.Code § 410.202. The appeals panel may affirm the hearing officer’s decision, reverse and render a new decision, or reverse and remand to the hearing officer for further record development. Id. § 410.203. The aggrieved party may appeal the appeals panel’s decision to the courts under a modified de novo review. See Garcia, 893 S.W.2d at 530.
*62II
Stan Manasco injured his back at work on January 20,1992. He filed a claim for workers’ compensation and received temporary benefits for fourteen months. On October 23, 1992, Manasco’s treating physician, Dr. Davis, certified that Manasco had reached maximum medical improvement and assigned him a thirty percent impairment rating. Lumbermens Mutual Casualty Company, the workers’ compensation carrier for Manasco’s employer, disputed the thirty percent impairment rating and requested that the Texas Workers’ Compensation Commission designate a doctor to determine Manasco’s rating. The Commission appointed Dr. Holmes, who eventually reported that Manasco had reached maximum medical improvement and had an impairment rating of seven percent. After the subsequent benefit review conference failed to resolve the dispute over Ma-naseo’s impairment rating, a contested case hearing was held on September 20, 1993. Manasco did not have counsel at the hearing, but relied on an ombudsman’s services.
On September 22,1993, the hearing officer found for Lumbermens, concluding that the seven percent impairment rating that Dr. Holmes — the Commission’s designated doctor1 — assigned had not been overcome by the great weight of contrary medical evidence. See Tex. Lab.Code § 408.122(c)(re-port of the designated doctor has presumptive weight unless the great weight of the other medical evidence is to the contrary). 'When the contested case hearing occurred, no surgery had been recommended or approved. Manasco did not appeal the September 22, 1993 decision, and it became final by statute. See id. § 410.169.
Three months after that contested case hearing became final, Dr. Heilman — the neurosurgeon recommended by Dr. Holmes— recommended that Manasco have surgery. On January 26, 1994, Dr. Heilman operated on Manasco’s back. Believing that his condition had worsened after the surgery, Ma-nasco requested a second conference and hearing. Manasco contended that he had experienced a “substantial change of condition,” under Texas Labor Code section 410.307, and that additional evidence should be considered on the issues of maximum medical improvement and impairment rating to increase his benefits. At the second contested case hearing on June 28, 1994, the hearing officer concluded that the prior determination of Manasco’s impairment rating was final and could not be reopened. Ma-nasco appealed to the Commission appeals panel, which affirmed the hearing officer’s decision. Manasco then filed suit in district court, seeking judicial review of the Commission’s decision. See Tex. Lab.Code § 410.251.
In the district court, the parties filed cross motions for summary judgment. Manasco argued that his impairment rating and maximum medical improvement determinations should be modified based on evidence of his “substantial change of condition” under section 410.307. In opposition, Lumbermens contended that section 410.307 was an evi-dentiary tool that allowed additional medical evidence to be introduced at trial, rather than a substantive provision allowing a claimant’s impairment rating to be reopened after a final decision had been rendered. The district court granted Lumbermens’ summary judgment motion, and Manasco appealed.
The court of appeals reversed the trial court’s judgment. It concluded that section 410.307 permits the district court to consider evidence of a substantial change of condition even though a claimant previously did not file a timely notice of appeal. 951 S.W.2d at 286. We granted Lumbermens’ petition for review on the issue of whether Manasco was entitled to reopen the determination of his impairment rating despite his failure to appeal the September 22,1993 hearing officer’s decision.
Ill
Under section 410.169 of the Act, the hearing officer’s decision is final absent a timely appeal. Tex. Lab.Code § 410.169. A party has fifteen days after the decision is received *63from the hearing officer in which to appeal. Id. § 410.202.2 Manaseo chose not to appeal the September 22, 1993 decision assigning him a seven percent impairment rating.
The court of appeals held that the district court could consider evidence of Ma-nasco’s substantial change of condition under section 410,307, even though he did not appeal his original impairment rating. Section 410.307states, “evidence of the extent of impairment is not limited to that presented to the commission if the court, after a hearing,-finds that there is a substantial change of condition.” Tex. Lab.Code § 410.307(a). The court of appeals treated this section as a substantive grant of review, giving a party the right of access to the court for a hearing to reopen a previous impairment rating decision if the worker subsequently develops a “substantial change of condition.” 951 S.W.2d at 290-91. We disagree with this interpretation of section 410.307.
Based on the wording and placement of section 410.307 in the statutory framework, it is clear that section 410.307 is a rule of evidence that applies only in the judicial review of a properly appealed impairment rating decision. Section 410.307 is in the sub-chapter governing judicial review and is placed immediately after the provision governing the general rules of evidence for judicial review. Section 410.307 is an exception to the general rules of evidence in section 410.306, which states that “evidence shall be adduced as in other civil trials.” Tex. Lab. Code § 410.306(a). Section 410.306 provides that the evidence is limited to that presented to the Commission, “except as provided in Section bló.807.” Id. § 410.306(c) (emphasis added). Under section 410.307, the evidence on judicial review regarding the extent of impairment is not limited to that presented to the Commission if the court, after a hearing, finds a substantial change of condition. Id. § 410.307(a).
The review provided by section 410.307is available only to those parties who have already appealed the contested case hearing officer’s decision to an appeals panel and wish to appeal the panel’s decision to a court. The party must exhaust administrative remedies before seeking judicial review. Tex. Lab.Code § 410.251. In the absence of a timely appeal, the decision of the hearing officer regarding benefits is final. Id. § 410.169. Section 410.307 may be invoked only by a party who has exhausted administrative remedies, has sought judicial review of the Commission’s ruling, and has first learned of a substantial change of condition after the contested case hearing but before trial. See id. § 410.307(a)(2), (3)(requiring that the evidence have come to the party’s knowledge after the contested case hearing and that it could not have been discovered earlier). After a hearing in which new medical evidence of the substantial change of condition is presented,3 the trial court may admit the additional impairment evidence. Id. § 410.307(a)(1), (b).
Manaseo contends that section 410.307is a “safety valve” provision, which allows a party another hearing at any time upon discovery of a substantial change of condition, without regard to whether the party has exhausted his administrative remedies. He argues that restricting the “substantial change of condition” provision to only those claims that are in the appeals process will provide an incentive for parties to appeal merely to preserve the opportunity to argue a potential substantial change of condition if the need later arises. To reach this hypothetical result, Manaseo ignores other portions of the- Act. A claimant’s impairment rating is not final, and remains subject to revision, until the claimant reaches maximum medical improvement. Maximum medical improvement is the point when further material recovery or lasting improvement can no *64longer be reasonably anticipated, or two years after income benefits begin to accrue, whichever is sooner. Tex. Lab.Code § 401.011(30). Thus, until no further change of condition can be anticipated, maximum medical improvement has not been reached and no impairment rating will be decided until the two-year limit passes. Id. § 401.011(23). Manasco contends that insurance carriers’ doctors speed cases through the system to a claimant’s detriment. However, if an impairment rating is contested, the Commission designates a doctor of its— not the carrier’s — choosing. Id. § 401.011(15). The designated doctor’s determinations of whether the claimant has reached maximum medical improvement and the claimant’s impairment rating are accorded presumptive weight. See id. § 408.122(c)(report of the designated doctor has presumptive weight unless the great weight of the other medical evidence is to the contrary). In Manasco’s case, even his own treating physician concluded that Manasco had reached maximum medical improvement before the initial contested case hearing.
The statutory framework also undercuts the court of appeals’ reasoning that “no one would intentionally want to deprive an injured worker compensation where later there developed a ‘substantial change of condition’ from the original injury.” 951 S.W.2d at 291. If the Legislature had wanted to provide an open-ended means to challenge an impairment rating, it could have done so; instead, the Legislature provided a narrow exception to allow a claimant to present evidence of substantial change of condition that is discovered for the first time during the appeal process. Courts should not interpret a statute to provide broader rights than the Legislature intended.
The clear wording of section 410.307 dictates that Manasco’s attempt to reopen his impairment rating must fail. Manasco failed to appeal the impairment rating decided by the contested case hearing officer on September 22, 1993. Thus, he failed to exhaust administrative remedies, and the September 22, 1993 impairment rating of seven percent became final. See Tex. Lab.Code. § 410.169. Because Manasco failed to exhaust administrative remedies, he was not entitled to judicial review of his impairment rating. He cannot use a second set of administrative proceedings to bootstrap a belated appeal for judicial review of the unappealed impairment rating. ' Allowing claimants to do so would distort the Workers’ Compensation Act beyond its intent.
*****
We hold that Manasco cannot reopen his impairment rating under Texas Labor Code section 410.307 because he failed to timely appeal the original impairment rating. We therefore reverse the court of appeals’ judgment and render judgment that Manasco take nothing on his claim. Because of our holding, we do not reach Lumbermens’ other points of error.
SPECTOR, J., filed a dissenting opinion.. The designated doctor is one appointed by mutual agreement of the parties or by the Commission to recommend a resolution of a dispute as to the medical condition of an injured employee. Tex Lab.Code § 401.011(15).
. The opposing party has 15 days to respond after the copy of the request for appeal is served, and the appeals panel has 30 days in which to file its decision. Tex Lab.Code §§ 410.202(b), 410.204(a). A party has 40 days after the appeals panel files its decision in which to appeal to the district court. Id. § 410.252(a).
. Evidence of the substantial change of condition may be based on the opinion of the same doctor whose testimony was presented to the Commission, or, if the substantial change of condition is disputed, based on the designated doctor's findings. Tex. Lab Code § 410.307(a)(1), (b).