Negative X-Rays Cannot Rebut Legal Pneumoconiosis Under the Fifteen-Year Presumption, and Issues Not Raised to the Benefits Review Board Are Forfeited

1. Introduction

Sequoia Energy, LLC v. Amy Mitchell (6th Cir. Apr. 28, 2026) arises under the Black Lung Benefits Act (“BLBA”), which provides federal benefits to coal miners (and certain survivors) disabled by pneumoconiosis. Delbert Mitchell, an underground coal miner for at least 22 years (including substantial time with Sequoia Energy), stopped mining work in 2015 after a diagnosis of chronic obstructive pulmonary disease and was later described as having a “very severe” pulmonary impairment. He filed a BLBA claim in 2019.

The central dispute on appeal was narrow but consequential: once the “fifteen-year presumption” applied (15+ years qualifying coal mine work plus total pulmonary disability), did Sequoia rebut the presumption with medical opinions that relied heavily on negative chest x-rays and alternative causation theories?

The petition was brought by Sequoia Energy, LLC (and insurer National Union Fire/AIG) against respondents Amy Mitchell (surviving spouse receiving survivor’s benefits after Delbert Mitchell’s death) and the Director, Office of Workers’ Compensation Programs.

2. Summary of the Opinion

The Sixth Circuit denied Sequoia’s petition for review and affirmed the benefits award as upheld by the Benefits Review Board. The court held:

• Sequoia forfeited its appellate argument that Mitchell’s disability was caused by obesity and prescription narcotics because it did not raise that issue to the Benefits Review Board.
• Substantial evidence supported the ALJ’s decision to discount the employer’s medical opinions to the extent they relied on negative x-rays to rule out legal pneumoconiosis; negative x-rays may bear on clinical pneumoconiosis but do not preclude legal pneumoconiosis under the BLBA’s broader definition.
• Because Sequoia failed to rebut the fifteen-year presumption through either statutory route, the presumption controlled and benefits were properly awarded.

3. Analysis

A. Precedents Cited

The opinion is largely an application of established Sixth Circuit BLBA doctrine. The court uses prior cases to define (i) the claimant’s burden (and how the presumption alters it), (ii) the employer’s rebuttal burden, (iii) the scope of appellate review, and (iv) issue-preservation rules.

1) Elements of entitlement and overlap of pneumoconiosis concepts

• Island Creek Coal Co. v. Wilkerson, 910 F.3d 254 (6th Cir. 2018): Cited for the four elements of entitlement—total disability, pneumoconiosis, disease arising from coal mine employment, and contribution to disability—while recognizing the regulatory framing of causation.
• Arch on the Green, Inc. v. Groves, 761 F.3d 594 (6th Cir. 2014): Used to explain that the second and third elements often “overlap” because the statutory definition of pneumoconiosis already embeds an “arising out of coal mine employment” concept. This sets up why rebuttal commonly focuses on whether the miner has “legal pneumoconiosis” and whether it contributed to disability.

2) The fifteen-year presumption and burden shifting

• Incoal, Inc. v. Dir., Off. of Workers' Comp. Programs, U.S. Dep't of Lab., 123 F.4th 808 (6th Cir. 2024): Cited to describe the “powerful” burden-shifting of the “fifteen-year presumption,” under which proof of qualifying employment and total disabling respiratory impairment triggers presumed satisfaction of the remaining entitlement elements.
• Big Branch Res., Inc. v. Ogle, 737 F.3d 1063 (6th Cir. 2013): Quoted (via Incoal) for the formulation that once the presumption applies, the remaining elements are presumed. Later, Ogle is central to the court’s treatment of negative x-rays and legal pneumoconiosis.

3) Rebuttal standards: “de minimis” and “no part” requirements

• Island Creek Coal Co. v. Young, 947 F.3d 399 (6th Cir. 2020): The principal authority for the “tall order” of rebuttal. The court relies on Young to articulate the rigorous standards:
  • To rebut by disproving pneumoconiosis, the employer must show coal-dust exposure had “no more than a de minimis impact” on the impairment.
  • To rebut by disproving disability causation, the employer must show pneumoconiosis played “no part”—not even a de minimis one—in disability.
  These standards frame why equivocal medical opinions or those resting on legally insufficient premises fail to rebut the presumption.

4) Issue preservation (forfeiture) before the Benefits Review Board

• Island Creek Coal Co. v. Bryan, 937 F.3d 738 (6th Cir. 2019): Cited for the rule that arguments must be presented to the Benefits Review Board to be preserved for Sixth Circuit review; also cited for the substantial-evidence framing (“reasonable mind”) and deference to ALJ factfinding.
• Samons v. Nat'l Mines Corp., 25 F.4th 455 (6th Cir. 2022): Reinforces that issue-exhaustion/preservation principles apply in this BLBA review posture. Together with Bryan, it supports the panel’s conclusion that Sequoia forfeited its obesity/narcotics causation argument.

5) Appellate review: “exceedingly narrow” substantial evidence review

• S. Ohio Coal Co. v. Dir., Off. of Workers' Comp. Programs, U.S. Dep't of Lab., 128 F.4th 809 (6th Cir. 2025): Cited for the substantial-evidence standard and (elsewhere in the opinion) for describing clinical vs. legal pneumoconiosis.
• Huscoal, Inc. v. Dir., Off. of Workers' Comp. Programs, U.S. Dep't of Lab., 48 F.4th 480 (6th Cir. 2022): Quoted for the proposition that Sixth Circuit review is “exceedingly narrow,” signaling strong deference to ALJ evidentiary weighing.
• Big Branch Res., Inc. v. Ogle, 737 F.3d 1063 (6th Cir. 2013): Also used for the rule that an ALJ’s credibility/evidentiary decisions stand unless inadequately explained—an important constraint on operators’ challenges to ALJ treatment of medical opinions.

6) Negative x-rays and legal pneumoconiosis

• Big Branch Res., Inc. v. Ogle, 737 F.3d 1063 (6th Cir. 2013): The key precedent for the proposition that an ALJ may “devalue” physician opinions that “relied heavily on negative x-ray findings” to find no legal pneumoconiosis. The panel treats Ogle as effectively dispositive of Sequoia’s x-ray-based rebuttal theory.

B. Legal Reasoning

The court’s reasoning proceeds in three steps.

Step 1: The presumption applies, shifting the burden to the employer

The ALJ found (and Sequoia did not contest) (i) 15+ years of qualifying coal mine employment and (ii) total pulmonary disability. That triggered the fifteen-year presumption under 30 U.S.C. § 921(c)(4) and 20 C.F.R. § 718.305, meaning pneumoconiosis, coal-mine causation, and disability causation were presumed.

Step 2: One rebuttal argument was forfeited

Sequoia sought on appeal to argue that Mitchell’s disability stemmed from obesity and prescription narcotics. The Sixth Circuit refused to consider that argument because Sequoia did not present it to the Benefits Review Board. Relying on Island Creek Coal Co. v. Bryan and Samons v. Nat'l Mines Corp., the court treated the omission as forfeiture, restricting the appeal to the x-ray-based rebuttal issue.

Step 3: The remaining rebuttal effort fails under the BLBA’s legal/clinical distinction and the operator’s heavy rebuttal burdens

Sequoia’s doctors reasoned that if Mitchell had pneumoconiosis, his chest x-ray should show substantial abnormalities, but his x-rays were negative. The ALJ discounted that reasoning, and the Sixth Circuit upheld the ALJ because:

• The BLBA recognizes clinical pneumoconiosis (traditionally associated with fibrotic changes and radiographic evidence) and legal pneumoconiosis (broader: “any chronic lung disease or impairment . . . arising out of coal mine employment”). See 20 C.F.R. § 718.201(a).
• Negative x-rays may weigh against clinical pneumoconiosis, but do not rule out legal pneumoconiosis. The ALJ’s observation tracked Sixth Circuit law (especially Big Branch Res., Inc. v. Ogle), which permits ALJs to discount opinions that use negative x-rays as a major reason to reject legal pneumoconiosis.
• Even if the doctors meant the x-rays were only one “factor,” Sequoia still bore the rebuttal burden—either to disprove pneumoconiosis under the stringent “de minimis” standard or to prove pneumoconiosis played “no part” in disability. The x-ray evidence and the doctors’ x-ray-centered rationale did not satisfy those burdens.

Finally, under the “exceedingly narrow” substantial-evidence review, the panel concluded a reasonable mind could accept the ALJ’s explanation and evidentiary weighting; therefore, the ALJ’s credibility determinations stood.

C. Impact

Although unpublished (“Not Recommended for Publication”), the decision reinforces several practical rules that will predictably shape BLBA litigation in the Sixth Circuit:

• Issue preservation is outcome-determinative. Operators must raise all substantive rebuttal theories to the Benefits Review Board or risk forfeiture on judicial review. This encourages fuller administrative development and narrows appellate disputes.
• Negative x-rays have limited rebuttal utility once the presumption applies. The opinion reiterates that negative imaging cannot, by itself (or as a central rationale), defeat legal pneumoconiosis, which often manifests as obstructive disease (e.g., COPD) that may not appear radiographically as classic coal workers’ pneumoconiosis.
• Medical opinions must be tailored to the legal definitions. Physicians who implicitly equate pneumoconiosis with radiographic changes risk having their opinions discounted as inconsistent with the BLBA’s definition of legal pneumoconiosis.
• Deference to ALJs remains strong. The “reasonable mind” and “exceedingly narrow” review language signals that most operator challenges will rise or fall on whether the ALJ adequately explained the reasoning, not on reweighing medical evidence.

4. Complex Concepts Simplified

• Fifteen-year presumption (30 U.S.C. § 921(c)(4)): If a miner worked at least 15 years in qualifying coal mine conditions and has a totally disabling respiratory impairment, the law presumes the disability is due to pneumoconiosis. The operator then must disprove pneumoconiosis or disprove that it contributed at all to disability.
• Clinical vs. legal pneumoconiosis:
  • Clinical pneumoconiosis is the traditional, medical-category disease often associated with lung scarring and abnormalities that may show on x-rays.
  • Legal pneumoconiosis is broader and includes chronic lung diseases (including obstructive impairments) caused or aggravated by coal-mine dust exposure—even if imaging is negative.
• Rebuttal standards (“de minimis” / “no part”): The operator’s burden is not to show coal dust is “probably not” the cause, but to show coal dust had no more than a minimal effect (for disease existence) or no effect whatsoever (for disability causation).
• Forfeiture (issue preservation): If a party does not present an argument to the Benefits Review Board, the court of appeals generally will not consider it later.
• Substantial evidence review: The court does not decide the case anew; it asks only whether the ALJ’s decision is reasonably supported by the record and adequately explained.

5. Conclusion

Sequoia Energy, LLC v. Amy Mitchell reaffirms two controlling, practice-shaping principles in Sixth Circuit BLBA adjudication: (1) operators must preserve rebuttal arguments before the Benefits Review Board or they will be forfeited on appeal; and (2) negative chest x-rays cannot carry an operator’s rebuttal burden against legal pneumoconiosis under the fifteen-year presumption, particularly where medical opinions treat radiographic negativity as inconsistent with the Act’s broader definition. The decision underscores the presumption’s strength, the importance of legally accurate medical reasoning, and the high level of deference appellate courts give to ALJ evidentiary assessments.