Doe v. Dynamic Physical Therapy, LLC
The Court reversed a Louisiana ruling that had used a state healthcare-emergency immunity law to erase a patient's federal claims, holding that states have no power to grant immunity from liability under federal law.
The decision reaffirms a bedrock principle of American constitutional law: state legislatures can limit who gets sued under state law, but they cannot wipe out rights that federal law creates.
How it got here: The Louisiana Court of Appeal ruled the state immunity law barred plaintiff's federal claims; the Louisiana Supreme Court denied review; the patient then asked the U.S. Supreme Court to step in.
The Case in Depth
What happened
A patient identified only as John Doe filed suit, including federal claims, against a Louisiana physical therapy company. Louisiana law shields healthcare providers from civil liability during public health emergencies. The Louisiana Court of Appeal applied that state immunity law to knock out all of the patient's claims — including the ones grounded in federal law, not just state law.
The question before the Court
Can a state law that shields healthcare workers from lawsuits during a public health emergency also block patients' claims that arise under federal law?
The Court's answer
No — a state cannot use its own immunity law to block claims that arise under federal law. The Court held that Louisiana's healthcare-emergency immunity statute had no power over the patient's federal claims, because the Constitution's Supremacy Clause (Article VI) makes federal law binding on every state court, regardless of what state law says. States are free to define the limits of liability under their own laws — including granting immunity to healthcare providers during emergencies — but that authority stops at the boundary of federal law.
The Court was careful to note that the patient's federal claims may still fail. There are separate questions under federal law about whether those claims can even be brought — questions the Louisiana courts never had a chance to address because they wrongly dismissed everything under the state immunity statute. Those questions go back to Louisiana's courts to be decided first.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Patients who believe their federal rights were violated by healthcare providers cannot have those federal claims blocked by a state's own immunity rules. This applies broadly: any state that writes immunity statutes — whether for healthcare emergencies or anything else — still must leave federal claims intact. State law ends where federal law begins.
What changes now
The case returns to Louisiana's courts, which must now consider the patient's federal claims on their merits — the state immunity law cannot be used to dismiss them. However, the Supreme Court specifically signaled that those federal claims may face other obstacles under federal law itself, and Louisiana courts will address those questions first. This is a final ruling on the immunity issue, but not on whether the patient ultimately wins.
What this does not decide
The Court did not decide whether the patient's federal claims are valid or will succeed on remand. Louisiana courts must still evaluate whether the applicable federal statutes allow this type of lawsuit at all — a question the Court flagged as genuinely open and potentially outcome-determinative.
How the Court got there
The legal reasoning, step by step
- The Court applied the Supremacy Clause — the constitutional rule in Article VI declaring federal law 'the supreme Law of the Land,' binding on state courts regardless of conflicting state provisions. When a state law purports to extinguish a right or remedy created by federal law, the state law loses.
- States have genuine authority to shape their own tort systems, including writing immunity protections for healthcare workers during emergencies. That authority is real and uncontested here. But it only reaches claims that arise under state law; it cannot strip courts of the obligation to enforce federal law.
- Louisiana's immunity statute had been applied by the lower court to bar the patient's federal causes of action outright — not just state-law claims. The Court held, consistent with a clear line of its own prior decisions, that a state simply has no power to grant immunity from federal claims.
- The Court flagged that the patient's federal claims may still face an independent hurdle: whether the relevant federal statutes even allow this type of lawsuit in the first place (citing its 2022 decision in Cummings v. Premier Rehab Keller, which addressed the remedies available under certain federal disability and rehabilitation laws). That question was not decided here and is for the Louisiana courts to address on remand.
Doctrinal impact
Cases affected by this decision
Reaffirms Howlett v. Rose (496 U. S. 356)
Reaffirms that states cannot use their own law to block courts from enforcing federal rights.
Reaffirms Haywood v. Drown (556 U. S. 729)
Reaffirms that state laws stripping courts of authority over federal claims are invalid under the Supremacy Clause.
Reaffirms Williams v. Reed (604 U. S. 168)
Reaffirms the same Supremacy Clause principle that state law cannot override federal causes of action.