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N.D. Cal.Procedural orderFiled Aug. 17, 2026

Libbey v. John Muir Health

Judge
Martinez-Olguin
Docket
4:26-cv-03228
Court
U.S. District Court · Northern District of California
Pages
7
EmploymentCivil ProcedureMotion to Dismiss
In one sentence

In Diana Libbey v. John Muir Health, Judge Martinez-Olguin granted remand, finding no federal jurisdiction, and terminated the dismissal motion as moot.

Who this affects

Diana Libbey and John Muir Health; the case was remanded to state court, and the federal motion to dismiss was not decided on its merits.

What happened

Diana Libbey, a former hourly employee, sued John Muir Health in California state court, alleging underpayment and other wage-and-hour violations, including an overtime claim. John Muir Health moved the case to federal court, arguing that a collective bargaining agreement made the claim a federal claim.

Libbey asked the federal court to send the case back to state court. The court ruled that her overtime right came from California law, not the collective bargaining agreement, and that John Muir Health had not shown the claim required interpreting a specific agreement term. Without federal jurisdiction over the overtime claim, the court also could not exercise related jurisdiction over her other claims.

Judge Araceli Martinez-Olguin granted Libbey’s motion to remand and terminated John Muir Health’s motion to dismiss as moot, without prejudice to raising those arguments after remand. The clerk was directed to close the federal case.

The detailed version

For law students, journalists, and other readers who want the full reasoning

Case
Libbey v. John Muir Health · No. 4:26-cv-03228
Judge
Martinez-Olguin
Date
Aug. 17, 2026

Background

This was a putative wage-and-hour class action. Diana Libbey, a former hourly employee of John Muir Health, sued John Muir Health in California state court. Her operative complaint included an overtime claim under California Labor Code section 510 and other wage-and-hour claims.

John Muir Health removed the case to federal court. It asserted federal-question jurisdiction under the Labor Management Relations Act (LMRA), arguing that section 301 of that law preempted Libbey’s overtime claim because her employment was governed by a collective bargaining agreement (CBA). John Muir Health also asserted supplemental jurisdiction over Libbey’s non-overtime claims. Libbey moved to remand the case to state court, and John Muir Health moved to dismiss.

Court’s Analysis

The court explained that federal-question jurisdiction ordinarily must appear on the face of the plaintiff’s properly pleaded complaint. A narrow exception applies when federal law completely preempts a state-law claim, converting it into a federal claim. The LMRA can have that effect, but the court stated that the claim must be facially preempted; a federal defense alone does not create federal jurisdiction.

The court applied the two-step test used to determine whether section 301 preempts a state-law claim. First, it asks whether the claimed right comes from state law or exists only because of the CBA. The court held that Libbey’s right to overtime came from California Labor Code section 510, so the claim was not preempted at the first step.

John Muir Health argued that section 510 did not apply because California Labor Code section 514 can exempt employees covered by qualifying CBAs. The court rejected that argument for jurisdictional purposes, explaining that section 514 is an affirmative defense and that its possible application could not create federal jurisdiction at this stage. The court noted that section 514 might eventually affect the overtime claim, but it did not decide that issue.

At the second step, the court asked whether resolving the claim would require interpretation of the CBA because of an active dispute about the meaning of contract terms. John Muir Health had asserted that interpretation might be required, but the court found that it had waived that argument by failing to defend it in opposition to the remand motion. The court further stated that, even if the argument had not been waived, John Muir Health had not identified an active dispute over the meaning of any specific CBA term.

Because John Muir Health had not established original federal jurisdiction over the overtime claim, the court held that supplemental jurisdiction over Libbey’s other claims was unavailable.

Disposition

The court GRANTED Libbey’s motion to remand. It TERMINATED AS MOOT John Muir Health’s motion to dismiss, without prejudice to raising those arguments upon remand. The clerk was directed to close the federal case.

The authoritative version

Read the full 7-page opinion on CourtListener, the free public archive maintained by the Free Law Project.

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