Nohr v. McDonald — Board must address reasonably raised competence, adequacy, and duty-to-assist issues tied to a VHA opinion

The veteran sought service connection for disabilities allegedly related to herbicide exposure. During adjudication, the Board relied heavily on findings from reports by the National Academy of Sciences (NAS) and other scientific materials when evaluating the probative value of competing medical opinions.

The Court found that the Board inadequately explained how it used the medical literature and scientific studies in its analysis. The Court emphasized that while the Board may consider recognized medical treatise evidence, it must explain how that evidence applies to the specific facts of the veteran’s case rather than relying on generalized scientific conclusions.

The Court also addressed fair-process concerns. It explained that when the Board intends to rely on extra-record evidence or medical treatise materials not previously provided to the claimant, the claimant generally must receive notice and an opportunity to respond.

Nohr became an important case governing the Board’s use of scientific literature, NAS reports, and medical treatise evidence in veterans claims adjudication.

• The Board must adequately explain reliance on medical treatise evidence.
• Generalized scientific studies must be connected to the facts of the individual case.
• Claimants are entitled to fair process when the Board relies on extra-record evidence.
• The Board must provide adequate reasons and bases concerning competing medical evidence.
• Medical literature does not automatically outweigh individualized medical opinions.

Nohr reinforces that the Board cannot rely on generalized medical studies or scientific reports without adequately explaining their relevance and ensuring fair process protections.

Nohr is frequently important in herbicide, toxic exposure, environmental exposure, and complex medical causation claims involving NAS reports and scientific literature.

• Blind reliance on NAS findings without individualized analysis.
• Failure to provide notice regarding extra-record medical literature.
• Conclusory weighing of scientific evidence.
• Inadequate reasons and bases concerning competing medical opinions.

The Board denies a toxic exposure claim by citing generalized NAS findings without addressing a favorable specialist opinion tailored to the veteran’s medical history. Under Nohr, the Board may have failed to adequately explain its analysis.

Use Nohr when:
• VA relies heavily on generalized scientific studies.
• Challenging improper use of NAS reports.
• Arguing fair-process violations involving extra-record evidence.
• Contesting inadequate analysis of competing medical literature.

Austin v. Brown, Thurber v. Brown