Questão jurídica principal
Whether the federal appeal against the cantonal decision on ordering a medical expert opinion is admissible as a separate appeal against an interlocutory decision.
Decisão extraída
The appeal is not separately admissible because the challenged decision concerns an interlocutory matter; such review is reserved for the final decision unless formal recusal grounds are raised.
Fundamentação extraída
Decisions concerning medical expert opinions in social insurance cases are generally not independently appealable to the Federal Supreme Court. The appellant alleged no formal bias or recusal grounds, only substantive objections to the expert office's conduct, which can be raised later against the final decision.