Federal District Court Jurisdiction Before Discovery Sanctions

Puerto Rico Law Controversies

Federal District Court Must Resolve Jurisdiction Before Imposing Discovery Sanctions in Puerto Rico Medical Malpractice Action

Prepared March 15, 2026

Court: United States Court of Appeals for the First Circuit

Date: March 9, 2026

Citation: Villanueva Pérez v. Hospital Damas, Inc., 2026 WL 693346 (1st Cir. 2026)

Summary of Relevant Facts

Marilix Villanueva Pérez and Luis Angel Román Peña brought suit against Hospital Damas, Inc. and individual physicians in the United States District Court for the District of Puerto Rico. The defendant hospital filed a motion to dismiss for lack of diversity jurisdiction.

Procedural Background

Despite the pending jurisdictional challenge, the district court did not rule on Hospital Damas's motion to dismiss for lack of jurisdiction. Instead, the court dismissed the case on substantive grounds for the plaintiffs' failure to support their claims with necessary expert witness testimony. The plaintiffs appealed.

Main Controversies

The central controversy was whether the district court erred by bypassing a pending motion to dismiss for lack of diversity jurisdiction and instead dismissing the case on the merits. The case also raised the question of whether a Puerto Rico medical malpractice action brought in federal court under diversity jurisdiction must comply with the expert witness requirements applicable to such claims.

Position of the Parties

The plaintiffs argued the district court erred by resolving the merits before addressing the threshold jurisdictional challenge. Hospital Damas raised jurisdictional defenses while also defending on the merits.

Holding or Decision

The First Circuit vacated the district court's decision and remanded. It held that a court's authority to hear a particular case is a necessary precondition to proper performance of judicial function, and that when confronted with motions under both Rule 12(b)(1) (lack of jurisdiction) and Rule 12(b)(6) (failure to state a claim), the court ordinarily ought to decide the jurisdictional question before addressing the merits.

Reasons for the Decision

The court applied the well-established principle that subject matter jurisdiction is a threshold issue that must be resolved before a court can properly exercise any of its other powers. If the district court lacks diversity jurisdiction, its merits ruling would be a nullity. On remand, the court was encouraged to first determine whether diversity jurisdiction exists and, if so, to reassess the discovery sanction imposed on the plaintiffs. The case highlights the particular complexities of Puerto Rico medical malpractice litigation in federal court, where the intersection of federal diversity jurisdiction requirements with Puerto Rico's substantive medical malpractice standards creates procedural obligations that courts must navigate in proper sequence.