The veteran served from 1974 to 1975 and was service connected for residuals of a low back injury. After an industrial accident in 1984, he underwent two laminectomies and sought service connection for the disc disorder causing the surgeries, an increased rating, a temporary total rating for hospitalization, and service connection for a personality disorder. The Board denied the laminectomy-related claim, reasoning that the service injury in and of itself did not require the surgeries, and denied the psychiatric claim because personality disorder is not a ratable disability. It also denied temporary total benefits because the hospitalization was for non-service-connected conditions.

The Court affirmed the personality-disorder ruling, relying on the regulatory exclusion of personality disorders from ratable disabilities. But it vacated and remanded the laminectomy-related issue because the Board had drawn a medical causation conclusion without independent medical evidence. The Court emphasized that judges may not make their own medical determinations and that the record lacked medical evidence explaining whether the service injury, the industrial injury, or both caused the surgeries. Because the temporary total rating claim depended on the service-connection outcome for the disc disorder, that issue was also remanded as inextricably intertwined.

The Board must support medical causation findings with independent medical evidence and may not supply its own medical judgment; when a downstream benefit turns on that causation question, the downstream claim may be remanded as intertwined.

If the Board decides a medical causation issue on its own, without competent medical support, that is reversible error. Practitioners should also look for any related temporary total, secondary, or downstream claim that rises or falls with the unresolved service-connection issue.

Johnson is an early and useful reminder that medical causation findings require competent evidence, not Board speculation. It also illustrates how a remand on one issue can preserve and reopen related benefits claims that depend on the same factual medical question.

Board Medical Judgment

A veteran has a service-connected back injury and later undergoes spine surgery after a post-service work accident. If the Board concludes, without a supportive medical opinion, that only the work accident caused the surgery, Johnson supports remand.

Use this case to challenge Board findings that attribute medical causation, onset, or surgical necessity without an adequate medical opinion. It is especially helpful where a related hospitalization, temporary total, or secondary-benefit claim depends on the unresolved medical nexus question.

Colvin v. Derwinski